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 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.83 yr (24,409 days) |
| Aphelion | 3.2249 AU |
| Perihelion | 1.5609 AU |
| 2.3929 AU | |
| Eccentricity | 0.3476 |
| 3.70 yr (1,352 days) | |
| 23.678° | |
| Inclination | 21.463° |
| 261.36° | |
| 115.95° | |
| Earth MOID | 0.6753 AU |
| Physical characteristics | |
| Dimensions | 8.00±0.58 km[4] 8.76 km (calculated)[3] |
| 11.403 h[5] 2.4±0.1 h[6] |
|
| 0.334±0.051[4] 0.23 (assumed)[3] |
|
| SMASS = Sq S [3] |
|
| 12.5 | |
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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
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<references />, or <references group="..." />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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