1661 Granule
Discovery [1] | |
---|---|
Discovered by | M. Wolf |
Discovery site | Heidelberg Obs. |
Discovery date | 31 March 1916 |
Designations | |
MPC designation | 1661 Granule |
Named after
|
Edward Gall (pathologist)[2][3] |
A916 FA · 1936 PM 1949 QG1 · 1949 SJ 1961 DB |
|
main-belt · Flora [4] | |
Orbital characteristics [1] | |
Epoch 27 June 2015 (JD 2457200.5) | |
Uncertainty parameter 0 | |
Observation arc | 98.95 yr (36,142 days) |
Aphelion | 2.3825 AU |
Perihelion | 1.9842 AU |
2.1833 AU | |
Eccentricity | 0.0912 |
3.23 yr (1,178 days) | |
236.69° | |
Inclination | 3.0359° |
261.74° | |
328.09° | |
Physical characteristics | |
Dimensions | 7.14 km (calculated)[4] |
24 h[5] | |
0.24 (assumed)[4] | |
S [4] | |
12.9 | |
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1661 Granule, also designated A916 FA, is a stony asteroid from the inner regions of the asteroid belt, about 7 kilometers in diameter. It was discovered by German astronomer Max Wolf at Heidelberg Observatiry on 31 March 1916.[6]
The asteroid is a member of the Flora family, a large group of stony main-belt asteroids. It orbits the Sun at a distance of 2.0–2.4 AU once every 3 years and 3 months (1,178 days). Its orbit shows an eccentricity of 0.09 and is tilted by 3 degrees to the plane of the ecliptic. It has a relatively long rotation period of 24 hours.[5] The geometric albedo of S-type asteroid is assumed to be about 0.24.[4]
Named in honor of the internationally renowned American pathologist and former director of the University of Cincinnati Academic Health Center and president of USCAP, Edward A. Gall. The minor planet was named on the occasion of his retirement to commemorate his career and his discovery of the Gall's granule, a feature of lymphocytes.[2][3]
References
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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
- 1661 Granule at the JPL Small-Body Database
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