Global Information38628 Huya information
 Huya and its satellite, imaged by the Hubble Space Telescope on 6 May 2012 | |
| Discovery[1] | |
|---|---|
| Discovered by | Ignacio R. Ferrín et al. |
| Discovery site | Llano del Hato Obs. |
| Discovery date | 10 March 2000 |
| Designations | |
MPC designation | (38628) Huya |
| Pronunciation | /huːˈjɑː/ hoo-YAH |
Named after | Huya |
Alternative designations | 2000 EB173 |
Minor planet category | TNO · plutino[2] Kozai res.[3] · distant[4] |
| Orbital characteristics[1][2] | |
| Epoch 17 December 2021 (JD 2459200.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 24.44 yr (8,926 days) |
| Earliest precovery date | 9 April 1996 |
| Aphelion | 50.835 AU |
| Perihelion | 28.552 AU |
Semi-major axis | 39.694 AU |
| Eccentricity | 0.28068 |
Orbital period (sidereal) | 250.09 yr (91,345 d) |
Mean anomaly | 8.038° |
Mean motion | 0° 0m 14.188s / day |
| Inclination | 15.474° |
Longitude of ascending node | 169.420° |
Time of perihelion | 14 December 2014[5] |
Argument of perihelion | 68.485° |
| Known satellites | 1 |
| Physical characteristics | |
Mean diameter | 411.0±7.3 km (primary only)[6] 406±16 km (primary only)[7] 458±9.2 km (primary and secondary, estimate)[7][8] |
| Mass | >5.01×1019 kg[a] |
Mean density | >1.43 g/cm3[9][10] ≈0.8 g/cm3 (assuming hydrostatic equilibrium)[6] |
Synodic rotation period | 6.725±0.006 h[6] 5.28 h (fragmentary)[9] 4.45±0.07 h (fragmentary)[11] 6.75±0.01 h (fragmentary)[12] |
Geometric albedo | 0.079±0.004 (primary only)[6] 0.083±0.004 (primary and secondary)[7][6] 0.081±0.008[8] |
Spectral type | IR (moderately red)[13][14] B−V=0.96±0.01[15][16] V−R=0.57±0.02[15] V−I=1.2±0.02[15] |
Apparent magnitude | 19.8 (opposition)[17] 19.11 (opposition, R-band)[18] |
Absolute magnitude (H) | 5.04±0.03[7] 5.048±0.021[19] 4.8 (assumed)[1][4] |
38628 Huya (/huːˈjɑː/ hoo-YAH; provisional designation 2000 EB173) is a binary trans-Neptunian object located in the Kuiper belt, a region of icy objects orbiting beyond Neptune in the outer Solar System. Huya is classified as a plutino, a dynamical class of trans-Neptunian objects with orbits in a 3:2 orbital resonance with Neptune. It was discovered by the Quasar Equatorial Survey Team and was identified by Venezuelan astronomer Ignacio Ferrín in March 2000. It is named after Juyá, the mythological rain god of the Wayuu people native to South America.
Huya's surface is moderately red in color due to the presence of complex organic compounds on its surface. Water ice has been suspected to be also present on its surface, although water ice has not been directly detected on Huya. Huya is considered as a mid-sized trans-Neptunian object, with an estimated diameter of about 400 km (250 mi). Huya has been considered to be a possible dwarf planet, though its relatively small size and dark surface may imply that it never collapsed into a solid body and was thus never in hydrostatic equilibrium.[20]
Huya has one known natural satellite, designated S/2012 (38628) 1. The satellite is relatively large compared to Huya and is expected to have slowed its rotation, although measurements of Huya's brightness variations have indicated that Huya's rotation may not be synchronous with the satellite's orbit.
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