| Minorplanet | yes |
|---|---|
| Background |
|
| Discoverer | NEAT |
| Discovery site | Palomar |
| Discovered | 8 April 2002 |
| Mpc name | (55576) Amycus |
| Pronounced | /ˈæmᵻkəs/[1] |
| Adjectives | Amycian /@ˈmIsiən/ |
| Named after | Amycus |
| Mp category | Centaur[2][3] |
| Epoch | 13 January 2016 (JD 2457400.5) |
| Aphelion | 35.019 AU (Q) |
| Perihelion | 15.178 AU (q) |
| Semimajor | 25.098 AU (a) |
| Eccentricity | 0.39526 (e) |
| Period | 125.74 yr (45926.7 d) |
| Inclination | 13.352° (i) |
| Asc node | 315.45° (Ω) |
| Mean anomaly | 37.041° (M) |
| Arg peri | 239.17° (ω) |
| Dimensions | 76.3 ± 12.5 km[4][5] |
| Albedo | ~ 0.18[4] |
| Magnitude | ~ 20[6] |
| Abs magnitude | 7.8[2] |
| Mean motion | / day (n) |
| Rotation | 9.76 h |
| Observation arc | 7204 days (19.72 yr) |
| Uncertainty | 2 |
| Jupiter moid | 9.92261 AU |
| Tisserand | 4.133 |
55576 Amycus /ˈæmᵻkəs/ is a centaur discovered on 8 April 2002 by the NEAT at Palomar.[2]
The minor planet was named for Amycus, a male centaur in Greek mythology.
It came to perihelion in February 2003.[2] Data from the Spitzer Space Telescope gave a diameter of 76.3 ± 12.5 km.[4][5]
A low probability asteroid occultation of star UCAC2 17967364 with an apparent magnitude of +13.8 was possible on 11 February 2009.[7] Another such event involving a star with an apparent magnitude of +12.9 occurred on 10 April 2014 at about 10:46 Universal Time, visible for observers in the southwest US and western Mexico.[8]
Near 3:4 resonance of Uranus
Amycus lies within 0.009 AU of the 3:4 resonance of Uranus and is estimated to have a long orbital half-life of about 11.1 Myr.[9][10]
See also
References
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
- ^ "JPL Small-Body Database Browser: 55576 Amycus (2002 GB10)" (2007-08-15 last obs). Retrieved 12 April 2016.
- ^ Marc W. Buie. "Orbit Fit and Astrometric record for 55576" (2003-06-22 using 73 of 81 observations). SwRI (Space Science Department). Archived from the original on 4 June 2011. Retrieved 2009-02-28.
- ^ John Stansberry; Will Grundy; Mike Brown; Dale Cruikshank; John Spencer; David Trilling; Jean-Luc Margot (2007-02-20). "Physical Properties of Kuiper Belt and Centaur Objects: Constraints from Spitzer Space Telescope". arXiv:astro-ph/0702538
- ^ Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived 13 February 2009 at the Wayback Machine. Retrieved 2009-02-28.
- ^ "AstDys (55576) Amycus Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2011-05-26. Retrieved 2009-03-15.
- ^ Steve Preston (2009-01-08). "Star occultation by asteroid 55576 Amycus". IOTA (International Occultation Timing Association). Retrieved 2009-12-28. [dead link]
- ^ Hans-J. Bode; Filipe Braga Ribas; B. Sicardy (2013). "Bright Star Occultations by TNOs in 2014. J. Occultation Astronomy 2014-1.". IOTA (International Occultation Timing Association)
- ^ Horner, J.; Evans, N.W.; Bailey, M. E. (2004). "Simulations of the Population of Centaurs I: The Bulk Statistics". Monthly Notices of the Royal Astronomical Society. 354 (3): 798–810. arXiv:astro-ph/0407400. Bibcode:2004MNRAS.354..798H. doi:10.1111/j.1365-2966.2004.08240.x. S2CID 16002759
- ^ Showalter, Mark R.; Benecchi, Susan D.; Buie, Marc W.; Grundy, William M.; Keane, James T.; Lisse, Carey M.; Olkin, Cathy B.; Porter, Simon B.; Robbins, Stuart J.; Singer, Kelsi N.; Verbiscer, Anne J.; Weaver, Harold A.; Zangari, Amanda M.; Hamilton, Douglas P.; Kaufmann, David E. (2021). "A statistical review of light curves and the prevalence of contact binaries in the Kuiper Belt". Icarus. 356. arXiv:2105.03543. Bibcode:2021Icar..35614098S. doi:10.1016/j.icarus.2020.114098. S2CID 225284888