1661 Granule

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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


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