1648 Shajna

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1648 Shajna
Discovery [1]
Discovered by P. Shajn
Discovery site Simeiz Observatory
Discovery date 5 September 1935
Designations
MPC designation 1648 Shajna
Named after
Couple of astronomers
(Pelageya and Grigory)[2]
1935 RF · 1934 CK1
1938 MC · 1941 FD
1948 LC · 1951 EX2
1952 SX · 1952 UW
1955 QT · 1955 RP
A921 GB · A924 EQ
main-belt · (inner)[3]
Orbital characteristics[1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 94.55 yr (34,535 days)   
Aphelion 2.6968 AU
Perihelion 1.7750 AU
2.2359 AU
Eccentricity 0.2061
3.34 yr (1,221 days)
15.040°
Inclination 4.5721°
130.42°
134.73°
Physical characteristics
Dimensions 9.450±0.141 km[4]
8.30±0.30 km[5]
9.23 km (calculated)[3]
6.4140 h[6][7]
0.1906±0.0165[4]
0.247±0.049[5]
0.20 (assumed)[3]
B–V = 0.792
U–B = 0.497
Tholen = S
S[3]
12.54

1648 Shajna, provisional designation 1935 RF, is a stony asteroid from the inner regions of the asteroid belt, about 9 kilometers in diameter. It was discovered by Russian female astronomer Pelageya Shajn at the Simeiz Observatory in Crimea on 5 September 1935.[8] Two weeks later, it was independently discovered by Cyril Jackson at Johannesburg Observatory, South Africa.[2]

The asteroid orbits the Sun at a distance of 1.8–2.7 AU once every 3.34 years (1,221 days). Its orbit shows an eccentricity of 0.21 and is tilted by 5 degrees to the plane of the ecliptic. It has a rotation period of 6.4 hours.[6][7] The S-type asteroid's albedo was measured by the WISE/NEOWISE mission and lies in between 0.20 and 0.25.[4][5]

The minor planet was named in honor of the late couple of Russian astronomers Grigory Abramovich Shajn (1892–1956) and the discoverer herself, Pelageya Shajn (1894–1956), first woman ever to discover a minor planet. The asteroid 1190 Pelagia is also named after her, while her husband is honored by the lunar crater Shayn.[2]

References

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External links


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