181 Eucharis
| Discovery | |
|---|---|
| Discovered by | Pablo Cottenot |
| Discovery date | 2 February 1878 |
| Designations | |
| A906 GA | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 123.63 yr (45157 d) |
| Aphelion | 3.7664 AU (563.45 Gm) |
| Perihelion | 2.49280 AU (372.918 Gm) |
| 3.12958 AU (468.179 Gm) | |
| Eccentricity | 0.20347 |
| 5.54 yr (2022.2 d) | |
Average orbital speed | 16.64 km/s |
| 32.3207° | |
| 0° 10m 40.879s / day | |
| Inclination | 18.890° |
| 143.224° | |
| 318.943° | |
| Earth MOID | 1.53686 AU (229.911 Gm) |
| Jupiter MOID | 1.47086 AU (220.038 Gm) |
| Jupiter Tisserand parameter | 3.099 |
| Physical characteristics | |
| Dimensions | 106.66±2.2 km |
| 52.23 h (2.176 d)[1][2] | |
| 0.1135±0.0054 | |
|
S (Tholen) Xk (Bus)[3] | |
| 7.84 | |
|
| |
181 Eucharis is a large, slowly rotating main-belt asteroid that was discovered by French astronomer Pablo Cottenot on February 2, 1878, from Marseille Observatory.[4] It was his only asteroid discovery. This object was named after Eucharis, a Greek nymph.
In the Tholen classification system, it is categorized as a stony S-type asteroid, while the Bus asteroid taxonomy system lists it as an Xk asteroid.[3] Photometric observations of this asteroid at the Goat Mountain Astronomical Research Station in Rancho Cucamonga, California during 2007 gave a light curve with a leisurely rotation period of 52.23 ± 0.05 hours.[2]
This object is the namesake of a family of 149–778 asteroids that share similar spectral properties and orbital elements; hence they may have arisen from the same collisional event. All members have a relatively high orbital inclination.[5]
References
- 1 2 Yeomans, Donald K., "181 Eucharis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- 1 2 Stephens, Robert D. (March 2008), "Long Period Asteroids Observed from GMARS and Santana Observatories", The Minor Planet Bulletin, 35 (1), pp. 21–22, Bibcode:2008MPBu...35...21S.
- 1 2 DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, 202 (1), pp. 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-04-08. See appendix A.
- ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 2013-04-07.
- ↑ Novaković, Bojan; et al. (November 2011), "Families among high-inclination asteroids", Icarus, 216 (1), pp. 69–81, arXiv:1108.3740
, Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016.
