31192 Aigoual

31192 Aigoual, provisional designation 1997 YH16, is a Xizang asteroid from the central region of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 29 December 1997, by staff members of the Pises Observatory in southern France.[7] The asteroid was named after Mont Aigoual in France.[2]

31192 Aigoual
Discovery [1]
Discovered byPises Obs.
Discovery sitePises Obs.
Discovery date29 December 1997
Designations
(31192) Aigoual
Named after
Mont Aigoual
(French mountain)[2]
1997 YH16 · 1978 UB4
1994 CG10 · 1996 RW26
2001 QS93
main-belt · (middle) [3]
Xizang [4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc38.50 yr (14,063 days)
Aphelion3.2655 AU
Perihelion2.2442 AU
2.7549 AU
Eccentricity0.1854
4.57 yr (1,670 days)
224.26°
0° 12m 56.16s / day
Inclination3.4534°
65.575°
278.23°
Physical characteristics
Dimensions7.34 km (calculated)[3]
4.3291±0.0009 h[5]
0.057 (assumed)[3]
C (assumed)[3]
13.9[1] · 13.948±0.003 (R)[5] · 14.00±0.24[6] · 14.4[3]

    Orbit and classification

    Aigoual is a member of the small Xizang family (536),[4] named after 2344 Xizang.[8] It orbits the Sun in the central main-belt at a distance of 2.2–3.3 AU once every 4 years and 7 months (1,670 days). Its orbit has an eccentricity of 0.19 and an inclination of 3° with respect to the ecliptic.[1] The asteroid was first identified as 1978 UB4 at Palomar Observatory in 1978, extending the body's observation arc by 19 years prior to its official discovery observation.[7]

    Physical characteristics

    Aigoual is an assumed carbonaceous C-type asteroid,[3] while the overall spectral type of the Xizang family has not yet been evaluated.[8]:23

    Rotational lightcurve

    In October 2010, a rotational lightcurve of Aigoual was obtained from photometric observations made by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 4.3291 hours with a brightness amplitude of 0.56 magnitude (U=2).[5]

    Diameter and albedo estimate

    The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 7.3 kilometers with an absolute magnitude of 14.4.[3]

    Naming

    This minor planet was named after Mont Aigoual, in the Cévennes National Park, where the discovering observatory is located. It is the highest mountain of the Cévennes in the Massif Central, France.[2] The approved naming citation was published by the Minor Planet Center on 28 March 2002 (M.P.C. 45237).[9]

    References
    1. "JPL Small-Body Database Browser: 31192 Aigoual (1997 YH16)" (2017-04-29 last obs.). Jet Propulsion Laboratory. Retrieved 27 June 2017.
    2. Schmadel, Lutz D. (2007). "(31192) Aigoual". Dictionary of Minor Planet Names – (31192) Aigoual. Springer Berlin Heidelberg. p. 890. doi:10.1007/978-3-540-29925-7_9967. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (31192) Aigoual". Asteroid Lightcurve Database (LCDB). Retrieved 3 May 2016.
    4. "Asteroid 31192 Aigoual – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 27 October 2019.
    5. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 3 May 2016.
    6. 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. Retrieved 3 May 2016.
    7. "31192 Aigoual (1997 YH16)". Minor Planet Center. Retrieved 3 May 2016.
    8. Nesvorný, D.; Broz, M.; Carruba, V. (December 2014). Identification and Dynamical Properties of Asteroid Families. Asteroids IV. pp. 297–321. arXiv:1502.01628. Bibcode:2015aste.book..297N. doi:10.2458/azu_uapress_9780816532131-ch016. ISBN 9780816532131.
    9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 May 2016.

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