Addon submission

[SevenSpheres]

Submit your add-ons in this issue, thanks for your contribution! Submission template:

**Title:**
**Description:** (a short description to be shown on the addon download window)
**Proposed category:** (pick one of the existing categories (https://celestia.mobi/resources/), or suggest a new one)
**Demo Object Name:** (optional, the name of the main object used for Go to command)
**Author(s):**
**Release date:**
**Link to download:**
**Image:** (optional, preferable with no UI control element, HUD display, size <= 800 * 400)

Check before uploading an add-on

Your add-on will be running on Android/iOS/macOS/Windows, to enable maximum compatibility, please ensure that

1. files names referenced in models, ssc, dsc files, etc are exactly the same as the actual file names (some file systems are case sensitive. For example if in your .ssc there is Mesh "Progress.cmod", then the file name should be exactly Progress.cmod not progress.cmod).
2. Textures should have width/height of power of 2 (for example: 1024 512, a texture of 1000 500 will not work on many mobile devices).

Example:

Title: HD 189733 b Description: Three textures for the exoplanet HD 189733 b, including a true-color fictional texture and two temperature maps. Proposed category: Exoplanets Demo Object Name: HD 189733 b Author(s): SevenSpheres (credit to: NASA, Askaniy, Eric Anderson, Andrew Tribick, nussun) Release date: 2020-10-16 Link to download: hd189733.zip Image:

[DaveBowman2001]

Title: Chandra Description: The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a NASA space telescope launched aboard the Space Shuttle Columbia during STS-93 by NASA on July 23, 1999. It is the third of the Great Observatories (after Hubble and Compton) to be launched. Its mission is still ongoing as of 2021 Proposed category: Spacecraft Demo Object Name: Chandra Author(s): toutatis Release date: 2018-Oct-16 Link to download: Chandra.zip Image:

[DaveBowman2001]

Title: Ulysses Description: Ulysses was a NASA/ESA space probe whose primary mission was to orbit the Sun and study it at all latitudes. It was launched in 1990 and made three "fast latitude scans" of the Sun in 1994/1995, 2000/2001, and 2007/2008. In addition, the probe studied several comets until it is decommissioned in 2009 Proposed category: Spacecraft Demo Object Name: Ulysses Author(s): FarGetaNik Release date: 2016-Aug-5 Link to download: Ulysses.zip Image:

[DaveBowman2001]

Title: Spektr-R Description: Spektr-R was a Russian scientific satellite with a 10 m (33 ft) radio telescope on board. It was launched on 2011-Jul-18 on a Zenit-3F rocket from Baikonur Cosmodrome, and was designed to perform research on the structure and dynamics of radio sources within and beyond the Milky Way. It lost contact with Earth on 2019-Jan-11 Proposed category: Spacecraft Demo Object Name: Spektr-R Author(s): Snowfall-The-Cat Release date: 2017-Aug-14 Link to download: Spektr-R.zip Image:

[levinli303]

@SevenSpheres @DaveBowman2001 all added

[DaveBowman2001]

Title: Rosetta Description: Rosetta was an ESA space probe launched on 2004-Mar-2. Along with Philae, its lander module, Rosetta performed a detailed study of comet 67P/Churyumov–Gerasimenko until the latter crashed intentionally on the comet's nucleus on 2016-Sept-30. Philae performed the first successful landing of a comet's nucleus on 2014-Nov-12

(NOTE: This addon also includes the comet 67P/Churyumov-Gerasimenko, and the asteroids Steins and Lutetia) Proposed category: Spacecraft Demo Object Name: Rosetta Author(s): toutatis, DaveBowman2001, FarGetaNik, Greg Frieger Release date: 2021-Jul-21 Link to download: Rosetta.zip Image:

[DaveBowman2001]

Title: Viking 1 and 2 Description: The Viking program consisted of a pair of identical NASA space probes, Viking 1 and Viking 2, which orbited/landed on Mars in 1976. Each spacecraft was composed of two main parts: an orbiter designed to photograph the surface of Mars from orbit, and a lander designed to study the planet from the surface. The orbiters also served as communication relays for the landers once they touched down. Viking 1 lasted from 1975-1982, while Viking 2 lasted from 1975-1980.

Long after the program ended, it is predicted that the Viking 1 orbiter will enter the Martian atmosphere sometime in 2019 Proposed category: Spacecraft Demo Object Name: N/A Author(s): toutatis, Jack Higgins Release date: 2020-Aug-1 Link to download: Viking 1 and 2.zip Image:

[DaveBowman2001]

Title: INTEGRAL Description: The INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) is a space telescope for observing gamma rays of energies up to 8 MeV that was launched by the European Space Agency (ESA) into Earth orbit in 2002. Despite its many mechanical failures and the launches of its successors (e.g. Fermi, Swift, etc.), it is still currently active as of 2021 Proposed category: Spacecraft Demo Object Name: INTEGRAL Author(s): Jestr Release date: 2008-Aug-12 Link to download: INTEGRAL.zip Image:

[DaveBowman2001]

Title: Buran Description: Buran was the first spaceplane to be produced as part of the Soviet/Russian Buran programme. Besides describing the first operational Soviet/Russian shuttle orbiter, "Buran" was also the designation for the entire Soviet/Russian spaceplane project and its orbiters, which were known as "Buran-class orbiters". It only flew once on 1988-Nov-15 which lasted approximately two hours (03:00:02 to 06:25:24 UTC) before the program was cancelled in 1993, following the collapse of the Soviet Union Proposed category: Spacecraft Demo Object Name: Buran Author(s): ElChristou Release date: 2008-Feb-13 Link to download: Buran.zip Image:

[DaveBowman2001]

Title: SAC-D (Aquarius) Description: SAC-D, also known as Aquarius after its primary instrument, is an Argentine Earth science satellite built by INVAP and operated by CONAE. SAC-D was launched from Vandenberg Air Force Base on 2011-Jun-10, with a planned mission life of five years. Due to a power system failure, the mission was ended on 2015-Jun-8 Proposed category: Spacecraft Demo Object Name: Aquarius Author(s): gironde, DaveBowman2001, toutatis Release date: 2021-Jul-1 Link to download: Aquarius.zip Image:

[DaveBowman2001]

Title: Lunar Reconnaissance Orbiter Description: The Lunar Reconnaissance Orbiter (LRO) is a NASA space probe launched in 2009-Jun-18 and sent to a polar orbit around the Moon to collect data from the lunar surface to aid future manned and robotic missions there. It is still currently active as of 2021, making it the longest lunar mission ever attempted.

(NOTE: This should not be confused with the earlier Lunar Orbiter program that saw five spacecraft that orbited the Moon between 1966 and 1968) Proposed category: Spacecraft Demo Object Name: LRO Author(s): toutatis Release date: 2021-Jul-23 Link to download: LRO.zip Image:

[DaveBowman2001]

Title: Mars Reconnaissance Orbiter Description: Mars Reconnaissance Orbiter (MRO) is a spacecraft designed to study the geology and climate of Mars, provide reconnaissance of future landing sites, and relay data from surface missions back to Earth. It was launched on 2005-Aug-12 and reached Mars on 2006-Mar-10. The spacecraft continues to operate at Mars, far beyond its intended design life. Due to its critical role as a high-speed data-relay for ground missions, NASA intends to continue the mission as long as possible, at least through the late 2020s Proposed category: Spacecraft Demo Object Name: MRO Author(s): toutatis Release date: 2021-Jul-12 Link to download: MRO.zip Image:

[DaveBowman2001]

Title: Giotto Description: Giotto was an ESA robotic spacecraft that flew as part of an international fleet of space probes called the "Halley Armada". The spacecraft flew by and studied Halley's Comet and in doing so became the first spacecraft to make close up observations of a comet on 1986-Mar-13. Six years later, after performing the first ever Earth gravity assist maneuver, it flew past another comet, called Grigg-Skjellerup, on 1992-Jul-10. Shortly after this encounter, Giotto was finally decommissioned

(NOTE: This modifies Halley's Comet and adds Comet Grigg-Skjellerup into Celestia) Proposed category: Spacecraft Demo Object Name: Giotto Author(s): BrianJ Release date: 2010-May-7 Link to download: Giotto.zip Image:

[DaveBowman2001]

Title: Inspiration4 Description: Inspiration4 (stylized as Inspirati④n) was a human orbital spaceflight operated by SpaceX on behalf of Shift4 Payments CEO Jared Isaacman. The mission launched the Crew Dragon Resilience on 2021-Sept-16, 00:02:56 UTC into LEO, and ended successfully on 2021-Sept-18, 23:06:49 UTC upon the splash down of the capsule in the Atlantic Ocean.

The mission successfully completed the first orbital spaceflight with only private citizens aboard and was part of a charitable effort on behalf of St. Jude's in Memphis, Tennessee. The crew consisted of Jared Isaacman, Hayley Arceneaux, Chris Sembroski, and Sian Proctor Proposed category: Spacecraft Demo Object Name: Inspiration4 Author(s): DaveBowman2001 Release date: 2021-Dec-29 Link to download: Inspiration4.zip Image:

[DaveBowman2001]

Title: NEAR-Shoemaker Description: Near Earth Asteroid Rendezvous – Shoemaker (NEAR Shoemaker), renamed after its 1996 launch in honor of planetary scientist Eugene Shoemaker, was a NASA space probe that studied the near-Earth asteroid Eros from close orbit over a period of a year. It was the first spacecraft to successfully orbit and land on an asteroid.

(NOTE: This modifies the asteroid Eros, and adds the asteroid Mathilde into Celestia) Proposed category: Spacecraft Demo Object Name: NEAR Author(s): FarGetaNik Release date: 2016-Oct-19 Link to download: NEAR.zip Image:

[levinli303]

All uploaded

[SevenSpheres]

Since Haumea's rings are included by default, the "Haumea's Rings" addon adds nothing and should be removed. Here's a replacement.

The "Extreme TNOs" addon should be moved to the new "TNOs" category.

Title: Haumea artistic impression Description: This addon adds fictional (but realistic) textures by Snowfall-The-Cat for the dwarf planet Haumea and its rings. It also simulates the precession of Haumea's rings. Proposed category: TNOs Demo Object Name: Haumea Author(s): Snowfall-The-Cat, SevenSpheres Release date: 2020-05-19 [updated 2021-12-31] Link to download: Haumea_Snowfall.zip Image:

[SevenSpheres]

With the default exoplanet catalog being updated, some of the exoplanet addons (those that just add the planets, without custom textures) are going to become redundant. The ones I uploaded use Replace, so they should be fine. HD 189733 will need an update though, since the system is now (correctly) defined as a binary star.

How could we get a monthly-updating "Unconfirmed Exoplanets" addon added?

[levinli303]

new categories added: Stars Trans-Neptunian Objects (TNOs)

How could we get a monthly-updating "Unconfirmed Exoplanets" addon added?

we cannot do auto updating on the client side so two approaches:

1. for every new update, make a new entry, and remove the old entry (can still be uninstalled in INSTALLED), in the description, mention the need to uninstall old add-on.
2. reuse the old entry, but update the title to indicate the version, same in the description, mentioning it needs to be reinstalled when there is an update

[levinli303]

I'm planning to add version control to add-ons though. it would be... if you are at the category page and an add-on has an version newer than installed, a red badge will display next to the add-on's name. inside the addon's detail page, the uninstall button will be replaced with update button.

[DaveBowman2001]

XYZV Update for Europa Clipper

Title: Europa Clipper Description: Europa Clipper is a NASA interplanetary mission currently in development. Planned for launch in 2024-Oct-6, the spacecraft is being developed to study the Galilean moon Europa through a series of flybys while in orbit around Jupiter. It will serve as a direct follow-up to the Galileo mission, which also studied the four Galilean moons of Jupiter in detail from 1995 to 2003

(NOTE: The XYZV trajectory still follows the earlier SLS direct injection plan plotted out in 2017, which runs from 2022-2028. Will replace when data for the new trajectory using the Falcon Heavy from 2024-2030 becomes available) Proposed category: Spacecraft Demo Object Name: Europa Clipper Author(s): Endeavor35, toutatis Release date: 2021-Jul-4 Link to download: Europa Clipper.zip Image:

[DaveBowman2001]

SSC Update for Mars Pathfinder

Title: Mars Pathfinder Description: Mars Pathfinder, the second mission under NASA's Discovery Program, is the first successful US mission to Mars since the Viking probes of the 1970s. Upon landing on Ares Vallis on 1997-Jul-4. it also carried Sojourner, the first rover to move on the Martian surface Proposed category: Spacecraft Demo Object Name: Mars Pathfinder Author(s): DaveBowman2001 Release date: 2021-Nov-11 Link to download: Mars Pathfinder.zip Image:

[DaveBowman2001]

SSC Update for Viking 1 and 2

Title: Viking 1 and 2 Description: The Viking program consisted of a pair of identical NASA space probes, Viking 1 and Viking 2, which orbited/landed on Mars in 1976. Each spacecraft was composed of two main parts: an orbiter designed to photograph the surface of Mars from orbit, and a lander designed to study the planet from the surface. The orbiters also served as communication relays for the landers once they touched down. Viking 1 lasted from 1975-1982, while Viking 2 lasted from 1975-1980.

Long after the program ended, it is predicted that the Viking 1 orbiter will enter the Martian atmosphere sometime in 2019 Proposed category: Spacecraft Demo Object Name: N/A Author(s): toutatis, Jack Higgins Release date: 2020-Aug-1 Link to download: Viking 1 and 2.zip Image:

[DaveBowman2001]

Title: Pioneer 10 and 11 Description: Pioneer 10 and Pioneer 11 were the twin NASA spacecraft that became the first spacecraft to visit Jupiter and Saturn, and the first of (so far only) five spacecraft that achieve escape velocity from the Sun. Although the data sent back were of relatively poor quality compared to modern standards, and did not reach interstellar space while operational, it laid the groundwork for the success of all future missions to the outer solar system, starting with the Voyager program. Proposed category: Spacecraft Demo Object Name: N/A Author(s): toutatis Release date: 2019-Oct-2 Link to download: Pioneer 10 and 11.zip Image:

[DaveBowman2001]

Title: Spitzer Space Telescope Description: The Spitzer Space Telescope, formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space telescope operating from 2003-2020. The fourth of NASA's five Great Observatories, It was the third spacecraft dedicated to infrared astronomy, following IRAS (1983) and ISO (1995–98). It was the first spacecraft to use an Earth-trailing orbit, later used by the Kepler planet-finder in 2009 Proposed category: Spacecraft Demo Object Name: Spitzer Author(s): Jack Higgins Release date: 2007-Dec-9 Link to download: Spitzer.zip Image:

[DaveBowman2001]

Title: Lunar Prospector Description: Lunar Prospector was a NASA/Ames spacecraft that orbited the Moon for a year (1998-1999). It measured the surface composition and gravity fields of the Moon from a polar orbit around 100 km in altitude, consequently discovering the existence of water ice on the permanently shadowed craters of the lunar poles. As it deliberately crashed onto the Moon at the end of its mission in 1999-Jul-31, it carried along with it are the ashes of the late Dr. Eugene Shoemaker. Proposed category: Spacecraft Demo Object Name: Lunar Prospector Author(s): toutatis Release date: 2021-Jul-24 Link to download: Lunar Prospector.zip Image:

[DaveBowman2001]

Title: Kaguya Description: SELENE, better known in Japan by its nickname Kaguya (かぐや), was the second Japanese lunar orbiter spacecraft following the Hiten probe. Produced by the Institute of Space and Astronautical Science (ISAS) and the National Space Development Agency (NASDA), the spacecraft was launched on 2007-Sept-14. After successfully orbiting the Moon for a 20 months, the main orbiter was instructed to impact on the lunar surface near the crater Gill on 2009-Jun-10 Proposed category: Spacecraft Demo Object Name: Kaguya Author(s): gironde Release date: 2018-Jun-27 Link to download: Kaguya.zip Image:

[DaveBowman2001]

Title: M 42 (Orion Nebula) Description: The Orion Nebula (also known as Messier 42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae and is visible to the naked eye in the night sky. It is 1,344 ± 20 light-years away and is the closest region of massive star formation to Earth. This nebula is estimated to be 24 light-years across and has a mass of about 2,000 times that of the Sun Proposed category: Nebulae Demo Object Name: Orion Nebula Author(s): gradius_fanatic Release date: 2009-Mar-5 Link to download: Messier 42.zip Image:

[DaveBowman2001]

Title: M 57 (Ring Nebula) Description: The Ring Nebula (also catalogued as Messier 57, and NGC 6720) is a planetary nebula in the mildly northern constellation of Lyra around 2,567±115 light-years away. Such a nebula is formed when a star, during the last stages of its evolution before becoming a white dwarf, expels a vast luminous envelope of ionized gas into the surrounding interstellar space Proposed category: Nebulae Demo Object Name: M 57 Author(s): jll Release date: 2008-Jan-21 Link to download: Messier 57.zip Image:

[DaveBowman2001]

Title: M 97 (Owl Nebula) Description: The Owl Nebula (also known as Messier 97 or NGC 3587) is a starburst ("planetary") nebula approximately 2,030 light years away in the northern constellation Ursa Major Proposed category: Nebulae Demo Object Name: M 97 Author(s): AstroBoy Release date: 2008-Jan-21 Link to download: Messier 97.zip Image:

[DaveBowman2001]

Title: M 1 (Crab Nebula) Description: The Crab Nebula (also known as Messier 1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus. The nebula was discovered by English astronomer John Bevis in 1731, and it corresponds with a bright supernova recorded by Chinese astronomers in 1054, making it the first astronomical object identified that corresponds with a historical supernova explosion. It is located around 6,500 away from the Solar System Proposed category: Nebulae Demo Object Name: M 1 Author(s): Luigi C. Release date: 2011-Jun-4 Link to download: Messier 1.zip Image:

[DaveBowman2001]

Title: NGC 7293 (Helix Nebula) Description: The Helix Nebula (also known as NGC 7293 or Caldwell 63) is a planetary nebula located in the constellation Aquarius. The distance, measured by the Gaia mission, is 655±13 light-years. This nebula has sometimes been referred to as the "Eye of God" in pop culture, as well as the "Eye of Sauron" Proposed category: Nebulae Demo Object Name: NGC 7293 Author(s): jll Release date: 2008-Jan-22 Link to download: NGC 7293.zip Image:

[DaveBowman2001]

Title: M2-9 (Minkowski's Butterfly) Description: Minkowski 2-9 (also known as Minkowski's Butterfly, Twin Jet Nebula, the Wings of a Butterfly Nebula, or just Butterfly Nebula) is a planetary nebula located about 2,100 light-years away from Earth in the constellation Ophiuchus. The nebula was imaged by the Hubble Space Telescope in the 1990s Proposed category: Nebulae Demo Object Name: M2-9 Author(s): jll Release date: 2008-Nov-9 Link to download: M2-9.zip Image:

[DaveBowman2001]

Title: NGC 2818 Description: NGC 2818 is a planetary nebula located 10,400 light-years away in the southern constellation Pyxis. It is often cited as a member of the open cluster NGC 2818A framing it, however, radial velocity differences between the planetary nebula and open cluster suggest a chance alignment. The case is an example of a superimposed pair, similar to NGC 2438 and Messier 46 Proposed category: Nebulae Demo Object Name: NGC 2818 Author(s): Bob Hegwood Release date: 2009-Feb-9 Link to download: NGC 2818.zip Image:

[DaveBowman2001]

Title: NGC 6751 (Glowing Eye Nebula) Description: NGC 6751, also known as the Glowing Eye Nebula or the Dandelion Puffball Nebula, is a planetary nebula in the constellation Aquila. It is estimated to be about 6,500 light-years away from the Solar System Proposed category: Nebulae Demo Object Name: NGC 6751 Author(s): gradius_fanatic Release date: 2009-Feb-9 Link to download: NGC 6751.zip Image:

[DaveBowman2001]

Title: PK 164+31.1 (Headphone Nebula) Description: Jones-Emberson 1 (PK 164+31.1), also known as the Headphone Nebula, is a 14th magnitude planetary nebula in the constellation Lynx at a distance of 1,600 light years. The 16.8-magnitude central star is a very blue white dwarf Proposed category: Nebulae Demo Object Name: Jones-Emberson 1 Author(s): gradius_fanatic Release date: 2009-Feb-3 Link to download: PK 164+31.1.zip Image:

[DaveBowman2001]

Title: CoRoT Description: CoRoT was a French space telescope mission which operated from 2006 to 2013. The mission's two objectives were to search for extrasolar planets with short orbital periods, particularly those of large terrestrial size, and to perform asteroseismology by measuring solar-like oscillations in stars. It was the first spacecraft dedicated to the detection of transiting extrasolar planets, opening the way for more advanced probes such as Kepler and TESS. Proposed category: Spacecraft Demo Object Name: CoRoT Author(s): Carlytos Release date: 2008-Jun-17 Link to download: CoRoT.zip Image:

[levinli303]

all uploaded

[levinli303]

second thought I would probably not add update badge to mobile celestia. in the simplistic implementation user still has to go in to the specific category for the update badge to be shown, which would still be too many steps.

[SevenSpheres]

HD 189733 will need an update though, since the system is now (correctly) defined as a binary star.

Reuploaded: hd189733.zip

[SevenSpheres]

How could we get a monthly-updating "Unconfirmed Exoplanets" addon added?

Well, here's the first version; we'll see what happens next.

Title: Unconfirmed Exoplanets Description: Catalogue of unconfirmed exoplanets, supplementary to Celestia's default catalogue of confirmed exoplanets. Proposed category: Exoplanets Demo Object Name: N/A Author(s): Thomas Tarrants (Sirius_Alpha) Release date: 2022-01-01 Link to download: extrasolar_unconfirmed.zip

[DaveBowman2001]

SSC Update for Kepler-1520, now removes duplicate planet

Title: Kepler-1520 Description: This add-on adds a realistic, fully 3D model of the tail around Kepler-1520 b (KIC 12557548 b). A few exoplanets are known to have dust tails around them, because the planets' surfaces are literally evaporating off of them. KIC 12557548 b, now designated Kepler-1520 b, was the first known example of this. Proposed category: Exoplanets Demo Object Name: Kepler-1520 Author(s): LukeCEL, Gurren Lagann Release date: 2020-Jul-21 Link to download: Kepler-1520.zip Image:

[SevenSpheres]

...no, it was using Replace, no update should be needed

[DaveBowman2001]

@SevenSpheres it does use the Replace function, but it only duplicated the planet upon installation: The new SSC now defines Replace "b" instead of Replace "Kepler-1520 b:KOI 3794:KIC 12557548 b:b"

[DaveBowman2001]

Title: OSIRIS-REx Description: The third spacecraft under the New Frontiers program, OSIRIS-REx is a NASA asteroid mission launched in 2016 to retrieve 60-2000 g of material from asteroid 101955 Bennu. It reached the asteroid in late 2018, and made its sample collection in 2020. It is expected to return to Earth on 2023, and afterwards will go to the asteroid 99942 Apophis by 2029.

(NOTE: This addon also includes asteroid Bennu for Celestia) Proposed category: Spacecraft Demo Object Name: OSIRIS-REx Author(s): DaveBowman2001, toutatis, Askaniy Release date: 2021-Nov-12 Link to download: OSIRIS-REx.zip Image:

[DaveBowman2001]

Title: Deep Space 1 Description: Deep Space 1 was a NASA technology demonstration spacecraft which flew by asteroid 9969 Braille and comet 19P/Borrelly. It was part of the short-lived New Millennium Program, and operated from 1998 to 2001.

(NOTE: This addon modifies comet Borrelly and adds the asteroid Braille into Celestia) Proposed category: Spacecraft Demo Object Name: Deep Space 1 Author(s): FarGetaNik Release date: 2015-Jun-11 Link to download: Deep Space 1.zip Image:

[DaveBowman2001]

Title: Venus (Mariner 10) Description: A Venus cloud map made from that one iconic image taken by Mariner 10 in 1973. Proposed category: Basic Content Demo Object Name: Venus Author(s): cubicApoc Release date: 2021-Aug-13 Link to download: Venus.zip Image:

[DaveBowman2001]

Title: (231937) 2001 FO32 Description: (231937) 2001 FO32 is a 550-m potentially hazardous asteroid of the Apollo group. The asteroid safely passed by Earth on 2021-Mar-21 16:03 UTC from a closest approach distance of 0.0135 AU. It is the largest and one of the fastest asteroids to approach Earth within 3.8 million km in 2021. With an observation arc of 20 years, 2001 FO32 has a well-determined orbit, and its trajectory is well known through the year 2196. Proposed category: Asteroids & NEOs Demo Object Name: 2001 FO32 Author(s): John van Vilet Release date: 2021-Mar-7 Link to download: 2001 FO32.zip Image:

[DaveBowman2001]

Title: 99942 Apophis Description: 99942 Apophis is a 370-m potentially hazardous asteroid that caused a short period of concern in December 2004 when initial observations briefly indicated a probability up to 2.7% that it would hit Earth on 2029-Apr-13. Later observations refined Apophis' predicted trajectory and instead will fly past Earth about 36,530 km on that date. It is planned to be visited by OSIRIS-REx shortly after its Earth flyby in 2029, but wasn't funded yet Proposed category: Asteroids & NEOs Demo Object Name: Apophis Author(s): John van Vilet Release date: 2021-Mar-10 Link to download: 99942 Apophis.zip Image:

[DaveBowman2001]

Title: 2020 XL5 Description: 2020 XL5 is a near-Earth asteroid and Earth trojan discovered by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii on 2020-Dec-12. It oscillates around the Sun–Earth L4 point (leading 60°), one of the dynamically stable locations where the combined gravitational force acts through the Sun's and Earth's barycenter, making it the second known Earth trojan after 2010 TK7 Proposed category: Asteroids & NEOs Demo Object Name: 2020 XL5 Author(s): John van Vilet Release date: 2021-Feb-5 Link to download: 2020 XL5.zip Image:

[DaveBowman2001]

Title: M 20 (Trifid Nebula) Description: The Trifid Nebula (catalogued as Messier 20 or NGC 6514) is an H II region in the north-west of Sagittarius in a star-forming region in the Milky Way's Scutum-Centaurus Arm, which is about 4100±200 light-years distant. The object is an unusual combination of an open cluster of stars, an emission nebula (the relatively dense, reddish-pink portion), a reflection nebula (the mainly NNE blue portion), and a dark nebula (the apparent 'gaps' in the former that cause the trifurcated appearance, also designated Barnard 85). Viewed through a small telescope, the Trifid Nebula is a bright and peculiar object, and is thus a perennial favorite of amateur astronomers Proposed category: Nebulae Demo Object Name: M 20 Author(s): Killeen, Bob Hagwood, gradius_fanatic Release date: 2012-Jan-25 Link to download: Messier 20.zip Image: