156 Xanthippe

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156 Xanthippe
Discovery [1]
Discovered by J. Palisa
Discovery site Austrian Naval Obs.
Discovery date22 November 1875
Designations
(156) Xanthippe [2]
Pronunciation /zænˈθɪpiː/ [3]
Named after
 Xanthippe
(wife of Socrates) [4]
A875 WA; 1901 SA;
1902 VA; 1936 FG1;
1942 RP; 1949 BN
main-belt [1] [5]  ·(middle)
background [6]
Orbital characteristics [5]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 116.46 yr (42,537 d)
Aphelion 3.3475 AU
Perihelion 2.1069 AU
2.7272 AU
Eccentricity 0.2274
4.50 yr (1,645 d)
34.237°
0° 13m 7.68s / day
Inclination 9.7818°
241.83°
338.29°
Physical characteristics
Mean diameter
110.409  km [7] [8]
110.718±2.187 km [9]
115.49±1.74 km [10]
116.34±4.14 km [11]
120.99±2.5 km [12]
121.68±41.10 km [13]
122.02±31.66 km [14]
143.346±0.903 km [15]
143.35±0.90 km [15]
Mass (6.49±3.71)×1018 kg [11]
Mean density
7.86±4.57 g/cm3 [11]
22  h [16]
22.104±0.006 h [16]
22.37±0.01 h [17]
22.5 h [18]
0.030±0.004 [15]
0.03±0.03 [14]
0.04±0.03 [13]
0.0422±0.002 [12]
0.047±0.002 [10]
0.0504±0.0120 [9]
0.0687 [7]
Tholen = C [5]
SMASS = Ch [5] [8]
B–V = 0.713 [5]
U–B = 0.315 [5]
8.31 [8]
8.31±0.09 [7] [17]
8.64 [5] [9] [10] [12] [14] [15]
8.65 [13]
8.83±0.30 [19]

    Xanthippe (minor planet designation: 156 Xanthippe) is a dark background asteroid from the central regions of the asteroid belt, approximately 120 kilometers (75 miles) in diameter. It was discovered on 22 November 1875, by Austrian astronomer Johann Palisa at the Austrian Naval Observatory, in what is now Croatia. [1] It is named after Xanthippe, the wife of the Greek philosopher Socrates. [4]

    Contents

    Orbit and classification

    Xanthippe is a non-family asteroid from the main belt's background population. [6] It orbits the Sun in the central main-belt at a distance of 2.1–3.3  AU once every 4 years and 6 months (1,645 days; semi-major axis of 2.73 AU). Its orbit has an eccentricity of 0.23 and an inclination of 10° with respect to the ecliptic. [5]

    Physical characteristics

    Photometric observations of this asteroid at the European Southern Observatory in La Silla, Chile during 1981 gave a light curve with a period of 22.5 hours. [18] Based upon its spectrum this is classified as a hydrated C-type asteroid (Ch-subtype) in the SMASS classification, indicating that it likely has a carbonaceous composition. [5] [6]

    Diameter and albedo

    According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Xanthippe measures between 110.409 and 143.35 kilometers in diameter and its surface has an albedo between 0.030 and 0.0687. [7] [9] [10] [12] [13] [14] [15]

    Naming

    This minor planet was named for Xanthippe, the wife of the Greek philosopher Socrates (c. 470–399 BC), after whom asteroid 5450 Sokrates was named. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 ( H 20 ). [4]

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    References

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    2. ↑ "Xantippe" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    3. ↑ Benjamin Smith (1903) The Century Dictionary and Cyclopedia
    4. 1 2 3 Schmadel, Lutz D. (2007). "(156) Xanthippe". Dictionary of Minor Planet Names – (156) Xanthippe. Springer Berlin Heidelberg. p. 29. doi:10.1007/978-3-540-29925-7_157. ISBN   978-3-540-00238-3.
    5. 1 2 3 4 5 6 7 8 9 "JPL Small-Body Database Browser: 156 Xanthippe" (2018-03-06 last obs.). Jet Propulsion Laboratory . Retrieved 29 May 2018.
    6. 1 2 3 "Asteroid 156 Xanthippe". Small Bodies Data Ferret. Retrieved 29 May 2018.
    7. 1 2 3 4 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus. 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026.
    8. 1 2 3 "LCDB Data for (156) Xanthippe". Asteroid Lightcurve Database (LCDB). Retrieved 29 May 2018.
    9. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID   35447010. (catalog)
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    19. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID   53493339.
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