181 Eucharis

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181 Eucharis
Orbita asteroida 181.png
Orbital diagram
Discovery
Discovered by Pablo Cottenot
Discovery date2 February 1878
Designations
(181) Eucharis
Pronunciation /ˈjkərɪs/ [1]
Named after
Eucharis
A878 CB; 1906 GA
Main belt
Orbital characteristics [2]
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)
TJupiter 3.099
Physical characteristics
Dimensions106.66±2.2  km
52.23  h (2.176  d) [2] [3]
0.1135±0.005 4
S (Tholen)
Xk (Bus) [4]
7.84

    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 nymph from the 17th-century novel Les Aventures de Télémaque .

    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]

    Related Research Articles

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    686 Gersuind is a minor planet orbiting the Sun that was discovered by German astronomer August Kopff on 15 August 1909 from Heidelberg. It was named after a character in Gerhart Hauptmann's play Gersuind.

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    781 Kartvelia is a minor planet orbiting the Sun that was discovered by Russian astronomer Grigory Neujmin on January 25, 1914. Kartvelia comes from the historic name for the inhabitants of the nation of Georgia. This object is orbiting at a distance of 3.22 AU with an eccentricity (ovalness) of 0.12 and a period of 5.78 yr. The orbital plane is inclined at an angle of 19.1° to the plane of the ecliptic.

    References

    1. "eucharis" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    2. 1 2 Yeomans, Donald K., "181 Eucharis", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 12 May 2016.
    3. 1 2 Stephens, Robert D. (March 2008), "Long Period Asteroids Observed from GMARS and Santana Observatories", The Minor Planet Bulletin, vol. 35, no. 1, pp. 21–22, Bibcode:2008MPBu...35...21S.
    4. 1 2 DeMeo, Francesca E.; et al. (July 2009), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus, vol. 202, no. 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, vol. 216, no. 1, pp. 69–81, arXiv: 1108.3740 , Bibcode:2011Icar..216...69N, doi:10.1016/j.icarus.2011.08.016.