1565 Lemaître
| Discovery [1] | |
|---|---|
| Discovered by | S. Arend |
| Discovery site | Uccle – Belgium |
| Discovery date | 25 November 1948 |
| Designations | |
| MPC designation | 1565 Lemaitre |
Named after |
Georges Lemaître (astronomer, priest)[2] |
| 1948 WA | |
| Mars-crosser · Phocaea [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 67.40 yr (24617 days) |
| Aphelion | 3.2264 AU (482.66 Gm) |
| Perihelion | 1.5620 AU (233.67 Gm) |
| 2.3942 AU (358.17 Gm) | |
| Eccentricity | 0.34757 |
| 3.70 yr (1353.1 d) | |
| 130.05° | |
| 0° 15m 57.78s / day | |
| Inclination | 21.457° |
| 261.31° | |
| 116.09° | |
| Earth MOID | 0.674365 AU (100.8836 Gm) |
| Jupiter MOID | 2.55644 AU (382.438 Gm) |
| Jupiter Tisserand parameter | 3.357 |
| Physical characteristics | |
| Dimensions |
8.00±0.58 km[4] 8.76 km (calculated)[3] |
|
11.403 h (0.4751 d)[1][5] 2.4±0.1 h[6] | |
|
0.334±0.051[4] 0.23 (assumed)[3] | |
|
SMASS = Sq S [3] | |
| 12.5 | |
|
| |
1565 Lemaître, provisional designation 1948 WA, is an eccentric, stony asteroid and sizable Mars-crosser from the inner regions of the asteroid belt, about 8 kilometers in diameter. It was discovered by Belgian astronomer Sylvain Arend at the Royal Observatory of Belgium in Uccle, on 25 November 1948.[7]
The S-type asteroid, classified as a Sq-subtype in the SMASS taxonomy, is a member of the Phocaea family. It orbits the Sun at a distance of 1.6–3.2 AU once every 3 years and 8 months (1,352 days). Its orbit shows an eccentricity of 0.35 and is tilted by 21 degrees to the plane of the ecliptic. It has a rotation period of 11.4 hours[5] and an albedo of 0.33 and 0.23, based on results from the Japanese Akari survey and on assumptions made by the Collaborative Asteroid Lightcurve Link, respectively.[3][4]
The minor planet was named in honour of Belgian priest, astronomer and professor of physics, Georges Lemaître (1894–1966), widely regarded as the father of the Big Bang theory. The lunar crater Lemaître also bears his name. The asteroid 1565 Lemaître was the first minor planet to be numbered after the end of World War II.[2]
References
- 1 2 3 "JPL Small-Body Database Browser: 1565 Lemaitre (1948 WA)" (2015-09-24 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1565) Lemaître. Springer Berlin Heidelberg. p. 124. ISBN 978-3-540-29925-7. Retrieved November 2015.
- 1 2 3 4 5 "LCDB Data for (1565) Lemaitre". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved November 2015.
- 1 2 Warner, Brian D.; Vander Haagen, Gary A. (June 2008). "Lightcurve Analysis of 1565 Lemaitre". The Minor Planet Bulletin 35 (2): 52. Bibcode:2008MPBu...35...52W. ISSN 1052-8091. Retrieved November 2015.
- ↑ Behrend, Raoul. "Asteroids and comets rotation curves – (1565) Lemaitre". Geneva Observatory. Retrieved November 2015.
- ↑ "1565 Lemaitre (1948 WA)". Minor Planet Center. Retrieved November 2015.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- 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
- 1565 Lemaître at the JPL Small-Body Database
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