38628 Huya
38628 Huya, previously known by its provisional designation 2000 EB173) is a trans-Neptunian object (TNO). It was found in March 2000 by Ignacio Ferrin and announced on October 24, 2000. It was given the name Huya, after Juyá, the Wayuu rain god, in August 2003 by the International Astronomical Union.
 Artist's impression of Huya | |
| Discovery | |
|---|---|
| Discovered by | Ignacio Ferrin |
| Discovery date | March 10, 2000 |
| Designations | |
| MPC designation | 38628 Huya |
| 2000 EB173 | |
| TNO Plutino[1][2] | |
| Orbital characteristics[1][3] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 7627.387 Gm (50.986 AU) |
| Perihelion | 4269.292 Gm (28.538 AU) |
| 5948.340 Gm (39.762 AU) | |
| Eccentricity | 0.282 |
| 91580.694 d (250.73 a) | |
Average orbital speed | 4.63 km/s |
| 348.506° | |
| Inclination | 15.463° |
| 169.296° | |
| 67.637° | |
| Physical characteristics | |
| Dimensions | 480±50 km[4] 532±25 km[5] |
| Mass | 6.5×1019–1.8×1020 kg[6] |
Mean density | 2.0? g/cm³ |
| 0.12–0.15? m/s² | |
| 0.23–0.28? km/s | |
Sidereal rotation period | ? d |
| Albedo | 0.11±0.02[4] |
| Temperature | ~44 K |
Spectral type | (moderately red) B-V=1.00; V-R=0.65[7] |
| 19.3 (opposition) | |
| 4.7[3] | |
| 0.024" (max)[8] | |
Size
At the time when it was found, Huya was the biggest and brightest TNO yet found. It was found using data collected by at the CIDA Observatory in Venezuela. Astronomers think it's about 530 km in diameter.[5]
Surface
The object has a red-sloped reflectance spectrum, saying that the surface could be rich in organic material such as tholins.[9]
Orbit
Given the long orbit that TNOs have around the sun, Huya comes to opposition in early May of each year at an apparent magnitude of 19.3.
38628 Huya Media
Polar view of Huya's orbit around the Sun, with the outer planets' orbits shown for comparison.
Artist's rendition of Huya and its satellite. Huya is unlikely to be spherical according to Grundy et al., who propose that dark, mid-sized TNOs such as Huya are unlikely to be in hydrostatic equilibrium.
References
- ↑ 1.0 1.1 Marc W. Buie (April 22, 2007). "Orbit Fit and Astrometric record for 38628". SwRI (Space Science Department). Retrieved July 17, 2008.
- ↑ "MPEC 2006-X45 : Distant Minor Planets". Minor Planet Center & Tamkin Foundation Computer Network. December 21, 2006. Retrieved July 18, 2008.
- ↑ 3.0 3.1 "JPL Small-Body Database Browser: 38628 Huya (2000 EB173)". May 12, 2007. Retrieved July 17, 2008.
- ↑ 4.0 4.1 Stansberry (2005). "TNO/Centaur diameters and albedos". Retrieved November 8, 2006.
- ↑ 5.0 5.1 John Stansberry, Will Grundy, Mike Brown, Dale Cruikshank, John Spencer, David Trilling, Jean-Luc Margot (2007). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". .
- ↑ Radius of 253 km and density of 0.97 = 6.5×1019 kg mass. Radius of 279 km and density of 2.0 = 1.8×1020 kg mass
- ↑ "TNO and Centaur Colors". Archived from the original on September 8, 2006. Retrieved November 8, 2006.
- ↑ Huya Angular Size @ May 2015 Opposition: 480 km dia / (27.5543AU * 149 597 870 km) * 206265 = 0.024"
- ↑ Licandro, J; Oliva, E (2001). "NICS-TNG infrared spectroscopy of trans-neptunian objects 2000 EB173 and 2000 WR106". Astronomy and Astrophysics. 373 (3): L29–L32. arXiv:astro-ph/0105434. Bibcode:2001A&A...373L..29L. doi:10.1051/0004-6361:20010758. S2CID 15690206. Retrieved January 2, 2022.
Other websites
- Orbital simulation from JPL (Java) / Ephemeris
- 37th DPS: Albedos, Diameters (and a Density) of Kuiper Belt and Centaur Objects Archived 2006-11-07 at the Wayback Machine
- Planet 10? Tiny 'Plutino' Almost Qualifies Archived 2000-11-10 at the Wayback Machine
- Discovery of a bright Trans-Neptunian Object (Yale) Archived 2000-12-04 at Archive.today
- From the Rain Forest to Planet Huya Archived 2006-10-15 at the Wayback Machine