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 2 3 "JPL Small-Body Database Browser: 1648 Shajna (1935 RF)" (2015-10-20 last obs.). Jet Propulsion Laboratory. Retrieved 22 April 2016.
- 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 12 November 2015.
- 1 2 3 4 "LCDB Data for (1648) Shajna". Asteroid Lightcurve Database (LCDB). Retrieved 12 November 2015.
- 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 12 November 2015. - 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 12 November 2015.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1648) Shajna". Geneva Observatory. Retrieved 12 November 2015.
- 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 12 November 2015.
- ↑ "1648 Shajna (1935 RF)". Minor Planet Center. Retrieved 12 November 2015.
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
- 1648 Shajna at the JPL Small-Body Database
