Astronomy:52872 Okyrhoe
| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak Obs. |
| Discovery date | 19 September 1998 |
| Designations | |
| (52872) Okyrhoe | |
| Pronunciation | /oʊˈkɪroʊ.iː/[4] |
| Named after | Ωκυρόη, Ωκυρρόη Ōkyroē, Ōkyrroē |
| 1998 SG35 | |
| Minor planet category | centaur[1][2][3] |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5393 days (14.77 yr) |
| |{{{apsis}}}|helion}} | 10.908 astronomical unit|AU (1.6318 Tm) |
| |{{{apsis}}}|helion}} | 5.7875 AU (865.80 Gm) |
| 8.3478 AU (1.24881 Tm) | |
| Eccentricity | 0.30670 |
| Orbital period | 24.12 yr (8809.66 d) |
| Mean anomaly | 118.92° |
| Mean motion | 0° 2m 27.11s / day |
| Inclination | 15.665° |
| Longitude of ascending node | 173.03° |
| 337.79° | |
| Jupiter MOID | 0.468729 AU (70.1209 Gm) |
| TJupiter | 2.945 |
| Physical characteristics | |
| Mean diameter | 49 km[5] |
| Rotation period | 8.3 h[6] |
| Geometric albedo | 0.03[7] |
| B–V = 0.743±0.065[8] | |
| Absolute magnitude (H) | 10.8[1] |
52872 Okyrhoe /oʊˈkɪroʊ.iː/ is a centaur orbiting in the outer Solar System between Jupiter and Saturn. It was discovered on 19 September 1998, by the Spacewatch survey at Kitt Peak Observatory in Arizona, United States, and named after Ocyrhoe from Greek mythology.
Orbit and classification
Centaurs have short dynamical lives due to strong interactions with the giant planets. Okyrhoe is estimated to have an orbital half-life of about 670 thousand years.[9] Of objects listed as a centaur by the Minor Planet Center (MPC),[3] JPL,[1] and the Deep Ecliptic Survey (DES),[2] Okyrhoe has the second smallest perihelion distance of a numbered centaur. Numbered centaur (315898) 2008 QD4 has a smaller perihelion distance.
Naming
It was named after Ocyrhoe, the daughter of Chiron and Chariclo from Greek mythology.
Physical characteristics
Sublimation
Okyrhoe passed perihelion in early 2008,[1] and exhibited significant magnitude variations during March and April 2008.[10] This could be a sign of sublimation of volatiles.
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: 52872 Okyrhoe (1998 SG35)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=52872.
- ↑ 2.0 2.1 Marc W. Buie. "Orbit Fit and Astrometric record for 52872". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/52872.html.
- ↑ 3.0 3.1 "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. http://www.minorplanetcenter.org/iau/lists/Centaurs.html.
- ↑ 'Ocyroe' in Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html.
- ↑ Bauer, J. M.; Meech, K. J.; Fernandez, Y. R.; Pittichova, J.; Hainaut, O. R.; Boehnhardt, H.; Delsanti, A. C. (2003). "Physical Survey of 24 Centaurs with Visible Photometry". Icarus 166 (1): 195–211. doi:10.1016/j.icarus.2003.07.004. Bibcode: 2003Icar..166..195B.
- ↑ E. Dotto; M.A. Barucci. "Colours and composition of the Centaurs". Osservatorio Astronomico di Roma, Italy. https://www.google.com/search?q=cache:w2G_oO5mZVcJ:www.roe.ac.uk/~jkd/kbo_proc/dotto.doc+52872+Okyrhoe+albedo&hl=en&gl=us. (word format)
- ↑ Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited". Astronomy and Astrophysics 546: 20. doi:10.1051/0004-6361/201219566. Bibcode: 2012A&A...546A.115H. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012A&A...546A.115H. Retrieved 26 September 2019.
- ↑ 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. doi:10.1111/j.1365-2966.2004.08240.x. Bibcode: 2004MNRAS.354..798H.
- ↑ Trigo-Rodríguez; Melendo (2008). "A continuous follow-up of Centaurs, and dormant comets: looking for cometary activity.". European Planetary Science Congress. http://www.cosis.net/abstracts/EPSC2008/00291/EPSC2008-A-00291-1.pdf.
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