52872 Okyrhoe
Centaur
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52872 Okyrhoe /oÊËkɪroÊ.iË/ 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.
| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery site | Kitt Peak Obs. |
| Discovery date | 19 September 1998 |
| Designations | |
| (52872) Okyrhoe | |
| Pronunciation | /oÊËkɪroÊ.iË/[1] |
Named after | Î©ÎºÏ ÏÏη, Î©ÎºÏ ÏÏÏη ÅkyroÄ, ÅkyrroÄ |
| 1998 SG35 | |
| centaur[2][3][4] | |
| Symbol | .svg){kind=small} (astrological) |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5393 days (14.77 yr) |
| Aphelion | 10.908 AU (1.6318 Tm) |
| Perihelion | 5.7875 AU (865.80 Gm) |
| 8.3478 AU (1.24881 Tm) | |
| Eccentricity | 0.30670 |
| 24.12 yr (8809.66 d) | |
| 118.92° | |
| 0° 2m 27.11s / day | |
| Inclination | 15.665° |
| 173.03° | |
| 337.79° | |
| Jupiter MOID | 0.468729 AU (70.1209 Gm) |
| TJupiter | 2.945 |
| Physical characteristics | |
| 49 km[5] | |
| 8.3 h[6] | |
| 0.03[7] | |
| BâV = 0.743±0.065[8] | |
| 10.8[2] | |
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),[4] JPL,[2] and the Deep Ecliptic Survey (DES),[3] Okyrhoe has the second smallest perihelion distance of a numbered centaur. Numbered centaur (315898) 2008 QD4 has a smaller perihelion distance.
Naming
Physical characteristics
Sublimation
Okyrhoe passed perihelion in early 2008,[2] and exhibited significant magnitude variations during March and April 2008.[10] This could be a sign of sublimation of volatiles.