|Discovered by||Pablo Cottenot|
|Discovery date||February 2, 1878|
|Minor planet category||Main belt|
|Epoch June 14, 2006 (JD 2453900.5)|
|Aphelion||562.742 Gm (3.762 AU)|
|Perihelion||376.603 Gm (2.517 AU)|
|469.672 Gm (3.140 AU)|
|2031.902 d (5.56 a)|
Average orbital speed
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. 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. 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.
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.
- Yeomans, Donald K., "181 Eucharis", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30.
- Stephens, Robert D. (March 2008), "Long Period Asteroids Observed from GMARS and Santana Observatories", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 35 (1): 21–22, Bibcode:2008MPBu...35...21S.
- 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, 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): 69-81, arXiv:1108.3740, Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016.
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