| Minorplanet | yes |
|---|---|
| Background |
|
| Discoverer | Viktor Knorre |
| Discovered | 4 January 1876 |
| Mpc name | (158) Koronis |
| Pronounced | /kɒˈroʊnᵻs/[1] |
| Adjective | Koronidian /kɒrəˈnɪdiən/[2] |
| Alt names | A876 AA; 1893 PA; 1911 HB; 1955 HA1 |
| Mp category | Main belt |
| Epoch | 31 July 2016 (JD 2457600.5) |
| Semimajor | 2.86858 AU (429.133 Gm) |
| Perihelion | 2.71904 AU (406.763 Gm) |
| Aphelion | 3.0181 AU (451.50 Gm) |
| Eccentricity | 0.052130 |
| Period | 4.86 yr (1774.6 d) |
| Inclination | 1.0015° |
| Asc node | 277.96° |
| Mean anomaly | 15.346° |
| Avg speed | 17.80 km/s |
| Dimensions | 35.37 ± 1.4 km |
| Sidereal day | 14.218 h (0.592 d) |
| Abs magnitude | 9.27 |
| Albedo | 0.2766 ± 0.024 |
| Arg peri | 142.37° |
| Mean motion | / day |
| Observation arc | 122.53 yr (44755 d) |
| Uncertainty | 0 |
| Rotation | 14.218 h |
| Moid | 1.7299 AU (258.79 Gm) |
| Jupiter moid | 2.16233 AU (323.480 Gm) |
| Tisserand | 3.297 |
158 Koronis is a main-belt asteroid that was discovered by Russian astronomer Viktor Knorre on January 4, 1876, from the Berlin observatory.[3] It was the first of his four asteroid discoveries. The meaning of the asteroid name is uncertain, but it may come from Coronis, the mother of Asclepius from Greek mythology. Alternatively, it may come from Coronis, a nymph of the Hyades sisterhood.[4] The Koronis family is named after this asteroid.
From its spectrum this is classified as an S-type asteroid,[5] indicating a stony composition. Photometric observations show a synodic rotation period of 14.206 ± 0.002 hours with a brightness variation of 0.28–0.43 in magnitude.[6] A subsequent study at the Altimira Observatory during 2010 was in agreement with this estimate, yielding a rotation period of 14.208 ± 0.040 hours.[7] Based on a model constructed from the lightcurve, the shape of Koronis resembles that of 243 Ida, an asteroid in the same family, although it is a bit larger. [1]
A collision involving 158 Koronis 15 million years ago created a cluster of 246 objects. 158 Koronis itself retained 98.7% of the total mass. These new objects formed the Koronis(2) family. Koronis(2) is a subfamily of the much larger Koronis family.[8]
References
- ^
- ^ McClintock & Strong (1894) Cyclopaedia of Biblical, Theological, and Ecclesiastical Literature
- ^ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 2013-04-07
- ^ Schmadel, Lutz D. (2012), Dictionary of Minor Planet Names, 6th ed., Springer, p. 27, ISBN 978-3642297182
- ^ DeMeo, Francesca E. et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared", Icarus. 202 (1): 160–180, Bibcode:2009Icar..202..160D. doi:10.1016/j.icarus.2009.02.005, archived from the original on March 17, 2014, retrieved 2013-04-08 See appendix A.
- ^ Slivan, Stephen M. et al. (April 2003), "Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves", Icarus. 162 (2): 285–307, Bibcode:2003Icar..162..285S. CiteSeerX 10.1.1.136.468. doi:10.1016/S0019-1035(03)00029-0
- ^ Buchheim, Robert K. (July 2011), "Phase Curves of 158 Koronis and 535 Montague", The Minor Planet Bulletin. 38 (3): 128–130, Bibcode:2011MPBu...38..128B
- ^ Molnar, Lawrence A. & Haegert, M. J. (September 2009), "Details of Recent Collisions of Asteroids 832 Karin and 158 Koronis", American Astronomical Society, DPS meeting #41, #27.05. Vol. 41, pp. 27.05, Bibcode:2009DPS....41.2705M