1790 Volkov
Discovery[1]
Discovered byL. Chernykh
Discovery siteCrimean Astrophysical Obs.
Discovery date9 March 1967
Designations
(1790) Volkov
Named after
Vladislav Volkov (cosmonaut)[2]
1967 ER · 1926 AB
1950 BU1 · 1955 SV2
1957 FB
main-belt · Flora[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc91.42 yr (33,392 days)
Aphelion2.4644 AU
Perihelion2.0126 AU
2.2385 AU
Eccentricity0.1009
3.35 yr (1,223 days)
45.470°
0° 17m 39.48s / day
Inclination5.1103°
2.0099°
147.74°
Physical characteristics
Dimensions7.087±0.093 km[4]
8.057±0.059 km[5]
8.67±0.35 km[6]
8.98 km (calculated)[3]
10.7419±0.0002 h[7]
21.455±0.005 h[8]
0.24 (assumed)[3]
0.241±0.021[6]
0.2790±0.0288[5]
0.511±0.057[4]
S[3]
12.4[1][3] · 12.50[5][6]

    1790 Volkov, provisional designation 1967 ER, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter.

    It was discovered on 9 March 1967, by Russian astronomer Lyudmila Chernykh at Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula, and named after cosmonaut Vladislav Volkov.[2][9]

    Orbit and classification

    Volkov is a stony S-type asteroid and member of the Flora family, one of the largest populations of inner main-belt asteroids. It orbits the Sun in the inner main-belt at a distance of 2.0–2.5 AU once every 3 years and 4 months (1,223 days). Its orbit has an eccentricity of 0.10 and an inclination of 5° with respect to the ecliptic.[1] First identified as 1926 AB at Heidelberg Observatory, Volkov's observation arc is extended by 41 years prior to its official discovery observation.[9]

    Physical characteristics

    Rotation period

    Two rotational lightcurves of Volkov were obtained from photometric observations by Robert Stephens and by French amateur astronomer Pierre Antonini in early 2007. The lightcurves gave a rotation period of 10.7419 and 21.455 hours with a brightness variation of 0.09 and 0.14 magnitude, respectively (U=3/2).[7][8]

    Diameter and albedo

    According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Volkov measures between 7.08 and 8.67 kilometers in diameter, and its surface has an albedo between 0.241 and 0.511.[4][5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of its family – and calculates a diameter of 8.98 kilometers with an absolute magnitude of 12.4.[3]

    Naming

    This minor planet was named in honor of Russian–Soviet cosmonaut Vladislav Volkov, flight engineer of the Soyuz 11 spacecraft, who died at the age of 35 during the vehicle's return to Earth after completing the flight program of the Salyut station on 30 June 1971. The lunar crater Volkov is also named after him. The minor planets 1789 Dobrovolsky and 1791 Patsayev were named in honour of his dead crew members.[2]

    The names of all three cosmonauts are also engraved on the plaque next to the sculpture of the Fallen Astronaut on the Moon, which was placed there during the Apollo 15 mission, containing the names of eight American astronauts and six Soviet cosmonauts, who had all died in service. The official naming citation was published by the Minor Planet Center on 1 July 1972 (M.P.C. 3296).[10]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 1790 Volkov (1967 ER)" (2017-05-06 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017.
    2. 1 2 3 Schmadel, Lutz D. (2007). "(1790) Volkov". Dictionary of Minor Planet Names – (1790) Volkov. Springer Berlin Heidelberg. p. 143. doi:10.1007/978-3-540-29925-7_1791. ISBN 978-3-540-00238-3.
    3. 1 2 3 4 5 6 "LCDB Data for (1790) Volkov". Asteroid Lightcurve Database (LCDB). Retrieved 19 December 2016.
    4. 1 2 3 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 19 December 2016.
    5. 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; 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.
    6. 1 2 3 4 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    7. 1 2 Stephens, Robert D. (September 2007). "Photometry from GMARS and Santana Observatories - Early 2007". The Minor Planet Bulletin. 34 (3): 64–65. Bibcode:2007MPBu...34...64S. ISSN 1052-8091. Retrieved 19 December 2016.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (1790) Volkov". Geneva Observatory. Retrieved 19 December 2016.
    9. 1 2 "1790 Volkov (1967 ER)". Minor Planet Center. Retrieved 19 December 2016.
    10. ↑ Schmadel, Lutz D. "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7.
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