2003 AZ84 and 2013 FY27

[AstroChara]

This commit adds 2 new trans-Neptunian objects: 2003 AZ84 and 2013 FY27. Both are some of the largest known objects orbiting beyond Neptune.

• 2003 AZ84 uses a hydrostatic equilibrium triaxial ellipsoid shape solution, with its meridian position referencing the 2014 occultation.
• Lacking rotational information, 2013 FY27 is given a placeholder rotation period of 9 hours, the average rotation period of TNOs. The reference source is mentioned in comments in outersys.ssc, and is also implemented for two other objects with no rotation periods: Albion and 2004 XR190.
• Both objects have satellite detections, but 2003 AZ84's satellite is lost while 2013 FY27's satellite does not have public solution; as such, neither are included in this commit.

[pedro-fixingstuff]

Huya's satellite doesn't have a published orbit either (hopefully not for long!). I think using this as a criterion on whether adding moons or not isn't a good precedent. Not adding 2003 AZ84's moon is understandable, though.

[AstroChara]

Huya's satellite doesn't have a published orbit either (hopefully not for long!). I think using this as a criterion on whether adding moons or not isn't a good precedent. Not adding 2003 AZ84's moon is understandable, though.

Huya's moon at least have separation and orbital period; 2013 FY27's is even more unconstrained, so I decided to leave it out.

[pedro-fixingstuff]

Huya's moon at least have separation and orbital period; 2013 FY27's is even more unconstrained, so I decided to leave it out.

The Huya system's period is also an estimate (see Johnston's Archive, where it is marked with the [*E] code). I presume what Wikipedia is saying isn't supported by this source.