181 Eucharis

Eucharis (minor planet designation: 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.[5] It was his only asteroid discovery. This object was named after Eucharis, a Greek nymph.

181 Eucharis
Discovery
Discovered byPablo Cottenot
Discovery date2 February 1878
Designations
(181) Eucharis
Pronunciation/ˈjkərɪs/[1]
A906 GA
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.63 yr (45157 d)
Aphelion3.7664 AU (563.45 Gm)
Perihelion2.49280 AU (372.918 Gm)
3.12958 AU (468.179 Gm)
Eccentricity0.20347
5.54 yr (2022.2 d)
16.64 km/s
32.3207°
0° 10m 40.879s / day
Inclination18.890°
143.224°
318.943°
Earth MOID1.53686 AU (229.911 Gm)
Jupiter MOID1.47086 AU (220.038 Gm)
TJupiter3.099
Physical characteristics
Dimensions106.66±2.2 km
52.23 h (2.176 d)[2][3]
0.1135±0.0054
S (Tholen)
Xk (Bus)[4]
7.84

    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.[4] 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.[3]

    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.[6]

    References

    1. "eucharis". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
    2. Yeomans, Donald K., "181 Eucharis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. 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.
    4. 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, archived from the original (PDF) on 17 March 2014, retrieved 8 April 2013. See appendix A.
    5. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    6. 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.


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