| Discovery [1] | |
|---|---|
| Discovered by | G. Reiss |
| Discovery site | Algiers Obs. |
| Discovery date | 29 October 1935 |
| Designations | |
| (1376) Michelle | |
Named after | Michelle Reiss (discoverer's daughter) [2] |
| 1935 UH · 1931 JK | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 16 February 2017 ( JD 2457800.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 81.02 yr (29,594 days) |
| Aphelion | 2.7085 AU |
| Perihelion | 1.7478 AU |
| 2.2282 AU | |
| Eccentricity | 0.2156 |
| 3.33 yr (1,215 days) | |
| 216.89 ° | |
| 0° 17m 46.68s / day | |
| Inclination | 3.5516° |
| 163.47° | |
| 156.05° | |
| Physical characteristics | |
| Dimensions | 7.053±0.119 km
[4]
[5] 7.10 km (taken) [3] 7.104 km [6] 9.12±2.51 km [7] |
| 5.9748±0.0002 h
[8] 5.9766±0.0004 h [9] 5.9769±0.0005 h [10] 6.0±0.5 h [11] | |
| 0.263
[3]
[6] 0.267±0.058 [4] [5] 0.28±0.17 [7] | |
| S [3] | |
| 12.4 [1] [7] · 12.81 [3] [4] · 12.81±0.04 [6] [11] | |
1376 Michelle, provisional designation 1935 UH, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 29 October 1935, by French astronomer Guy Reiss at the North African Algiers Observatory in Algeria. [12] It is named for the discoverer's daughter, Michelle Reiss. [2]
Classification and orbit
Michelle is a member of the Flora family, one of the largest populations of stony S-type asteroids in the entire main-belt. It orbits the Sun at a distance of 1.7–2.7 AU once every 3 years and 4 months (1,215 days). Its orbit has an eccentricity of 0.22 and an inclination of 4 ° with respect to the ecliptic. [1] Michelle was first identified as 1931 JK at Lowell Observatory in 1931. The body's observation arc, however, begins with its official discovery observation at Algiers. [12]
Lightcurve
In October 2008, a group of French and Japanese astronomers obtained two rotational light-curves of Michelle from photometric observations. Light-curve analysis gave a well defined rotation period of 5.9748 and 5.9766 hours with a brightness variation of 0.20 and 0.13 magnitude, respectively ( U=3/3). [8] [9] The results concur with a period of 5.9769 hours obtained by a group of Polish astronomers in April 2004 ( U=2), [10] and with a period of 6.0 hours measured by JPL-photometrist Wiesław Wiśniewski in the 1980s ( U=2+). [11]
Diameter and albedo
According to the 2015-published results by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Michelle measures 9.12 kilometers in diameter and its surface has an albedo of 0.28, [7] while preliminary results gave a diameter of 7.1 kilometers and an albedo of 0.267. [4] [5] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.263 and a diameter of 7.10 kilometers, taken from Petr Pravec's 2012-revised WISE results. [3] [6]
Naming
This minor planet was named for Michelle Reiss, the third daughter of the discoverer. [2] The discoverer also named 1237 Geneviève and 1300 Marcelle after his other two daughters. Naming was first cited in The Names of the Minor Planets by Paul Herget in 1955 ( H 125). [2]
References
- ^ a b c d "JPL Small-Body Database Browser: 1376 Michelle (1935 UH)" (2016-11-06 last obs.). Jet Propulsion Laboratory. Retrieved 11 January 2017.
- ^ a b c d Schmadel, Lutz D. (2007). "(1376) Michelle". Dictionary of Minor Planet Names – (1376) Michelle. Springer Berlin Heidelberg. p. 111. doi: 10.1007/978-3-540-29925-7_1377. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (1376) Michelle". Asteroid Lightcurve Database (LCDB). Retrieved 11 January 2017.
- ^ a b c d 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.
- ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv: 1109.4096. Bibcode: 2011ApJ...741...68M. doi: 10.1088/0004-637X/741/2/68. Retrieved 11 January 2017.
- ^ a b c d 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. Retrieved 11 January 2017.
- ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv: 1509.02522. Bibcode: 2015ApJ...814..117N. doi: 10.1088/0004-637X/814/2/117. Retrieved 11 January 2017.
- ^ a b Hamanowa, Hiromi; Hamanowa, Hiroko (July 2009). "Lightcurves of 494 Virtus, 556 Phyllis, 624 Hektor 657 Gunlod, 111 Reinmuthia, 1188 Gothlandia, and 1376 Michelle". The Minor Planet Bulletin. 36 (3): 87–88. Bibcode: 2009MPBu...36...87H. ISSN 1052-8091. Retrieved 11 January 2017.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1376) Michelle". Geneva Observatory. Retrieved 11 January 2017.
- ^ a b Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; Ivanova, V.; Apostolovska, G.; et al. (October 2012). "Do Slivan states exist in the Flora family?. I. Photometric survey of the Flora region". Astronomy and Astrophysics. 546: 51. Bibcode: 2012A&A...546A..72K. doi: 10.1051/0004-6361/201219199. Retrieved 11 January 2017.
- ^ a b c Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. 26: 1511. Bibcode: 1995LPI....26.1511W. Retrieved 11 January 2017.
- ^ a b "1376 Michelle (1935 UH)". Minor Planet Center. Retrieved 11 January 2017.
External links
- Asteroid Lightcurve Database (LCDB), query form ( info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1376 Michelle at AstDyS-2, Asteroids—Dynamic Site
- 1376 Michelle at the JPL Small-Body Database
