52872 Okyrhoe
| Discovery | |
|---|---|
| Discovered by | Spacewatch |
| Discovery date | 19 September 1998 |
| Designations | |
| 1998 SG35 | |
| centaur | |
| Orbital characteristics | |
| 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° | |
| Earth MOID | 4.80423 AU (718.703 Gm) |
| Jupiter MOID | 0.468729 AU (70.1209 Gm) |
| Jupiter Tisserand parameter | 2.945 |
| Physical characteristics | |
| Dimensions | 49 km |
| 8.3 h | |
| 0.03 | |
| 10.8 | |
52872 Okyrhoe (/əˈkɪroʊ.iː/; from Greek: Ωκυρόη, Ωκυρρόη) is a centaur orbiting in the outer Solar System between Jupiter and Saturn. It was discovered on September 19, 1998, by Spacewatch.
Centaurs have short dynamical lives due to strong interactions with the giant planets. Okyrhoe (1998 SG35) is estimated to have an orbital half-life of about 670 kiloannum.
Of objects listed as a centaur by the Minor Planet Center (MPC),JPL, and the Deep Ecliptic Survey (DES), Okyrhoe has the second smallest perihelion distance of a numbered centaur. Numbered centaur (315898) 2008 QD4 has a smaller perihelion distance.
Okyrhoe passed perihelion in early 2008, and exhibited important magnitude variations during March and April 2008. This could be a sign of sublimation of volatiles.
It was named after Ocyrhoe, Greek mythology.
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