1648 Shajna

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 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 94.78 yr (34619 days)
Aphelion 2.6970 AU (403.47 Gm)
Perihelion 1.7749 AU (265.52 Gm)
2.2360 AU (334.50 Gm)
Eccentricity 0.20620
3.34 yr (1221.2 d)
73.998°
0° 17m 41.208s / day
Inclination 4.5721°
130.43°
134.73°
Earth MOID 0.761316 AU (113.8913 Gm)
Jupiter MOID 2.38901 AU (357.391 Gm)
Jupiter Tisserand parameter 3.606
Physical characteristics
Dimensions 9.450±0.141 km[4]
8.30±0.30 km[5]
9.23 km (calculated)[3]
6.4140 h (0.26725 d)[1][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

    1. 1 2 3 "JPL Small-Body Database Browser: 1648 Shajna (1935 RF)" (2015-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
    2. 1 2 3 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1648) Shajna. Springer Berlin Heidelberg. p. 131. ISBN 978-3-540-29925-7. Retrieved November 2015.
    3. 1 2 3 4 "LCDB Data for (1648) Shajna". Asteroid Lightcurve Database (LCDB). Retrieved November 2015.
    4. 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved November 2015.
    5. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved November 2015.
    6. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1648) Shajna". Geneva Observatory. Retrieved November 2015.
    7. 1 2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved November 2015.
    8. ↑ "1648 Shajna (1935 RF)". Minor Planet Center. Retrieved November 2015.

    External links


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