978 Aidamina

978 Aidamina
Discovery [1]
Discovered by S. Belyavskyj
Discovery site Simeiz Observatory
Discovery date 18 May 1922
Designations
MPC designation 978 Aidamina
Named after
 Aida Minaevna
(friend of discoverer)[2]
1922 LY · 1929 YA
1946 QD · 1966 BD
A906 VB · A923 YA
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 109.41 yr (39963 days)
Aphelion 3.9467 AU (590.42 Gm)
Perihelion 2.4490 AU (366.37 Gm)
3.1979 AU (478.40 Gm)
Eccentricity 0.23418
5.72 yr (2088.8 d)
84.794°
0° 10m 20.46s / day
Inclination 21.645°
216.64°
132.96°
Earth MOID 1.49407 AU (223.510 Gm)
Jupiter MOID 1.76555 AU (264.123 Gm)
Jupiter Tisserand parameter 3.044
Physical characteristics
Dimensions 78.73±2.3 km (IRAS:17)[4]
82.28±2.71 km[5]
92.10±0.76 km[6]
Mean radius
 39.365±1.15 km
10.099±0.004 h[7]
10.100±0.003 h[8]
9.5 h[9]
10.098±0.001 h[10]
10.099 h (0.4208 d)[1]
0.0365±0.002 (IRAS:17)[1][4]
0.035±0.002[5]
0.027±0.004[6]
B–V = 0.677
U–B = 0.252
Tholen = PF[1]
P [3]
9.73[1]

    978 Aidamina, provisional designation 1922 LY, is a large, rare-type asteroid from the outer region of the asteroid belt, about 80 kilometers in diameter. It was discovered by Soviet–Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula, on 18 May 1922.[11] Twelve nights later, the body was independently discovered by astronomer Max Wolf at Heidelberg, southern Germany.[2]

    The asteroid is the only body classified as a PF-type asteroid in the Tholen taxonomy,[12] a subtype of the dark and reddish P-type asteroids, of which only a few dozens bodies are currently known.[13] It orbits the Sun at a distance of 2.4–3.9 AU once every 5 years and 9 months (2,090 days). Its orbit is tilted by 22 degrees to the plane of the ecliptic and shows an eccentricity of 0.23.

    According to the surveys carried out by the Infrared Astronomical Satellite, IRAS, the Japanese Akari satellite, and the U.S. Wide-field Infrared Survey Explorer with its NEOWISE mission, the body has a very low albedo between 0.027 and 0.037.[4][5][6] Several photometric light-curve analysis rendered a concurring, well-defined rotation period of 10.1 hours,[7][8][10] while another observation resulted in an alternative period of 9.5 hours.[9]

    The minor planet was named after a friend of the discoverer's family, Aida Minaevna.[2]

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 978 Aidamina (1922 LY)" (2015-11-17 last obs.). Jet Propulsion Laboratory. Retrieved 2 May 2016.
    2. 1 2 3 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (978) Aidamina. Springer Berlin Heidelberg. p. 85. ISBN 978-3-540-29925-7. Retrieved 3 January 2016.
    3. 1 2 "LCDB Data for (978) Aidamina". Asteroid Lightcurve Database (LCDB). Retrieved 3 January 2016.
    4. 1 2 3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. Bibcode:2004PDSS...12.....T. Retrieved 3 January 2016.
    5. 1 2 3 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. Retrieved 3 January 2016.
    6. 1 2 3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; 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:1209.5794Freely accessible. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 3 January 2016.
    7. 1 2 Lecrone, Crystal; Duncan, Allison; Kirkpatrick, Elaine (December 2004). "Lightcurves and periods for asteroids 105 Artemis, 978 Aidamina, and 1103 Sequoia". The Minor Planet Bulletin. 31 (4): 77–78. Bibcode:2004MPBu...31...77L. ISSN 1052-8091. Retrieved 3 January 2016.
    8. 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (978) Aidamina". Geneva Observatory. Retrieved 3 January 2016.
    9. 1 2 Clark, Maurice (September 2006). "Lightcurve results for 383 Janina, 899 Jokaste, 1825 Klare, 2525 O'Steen 5064 Tanchozuru, and (17939) 1999 HH8". The Minor Planet Bulletin. 33 (3): 53–56. Bibcode:2006MPBu...33...53C. ISSN 1052-8091. Retrieved 3 January 2016.
    10. 1 2 Pilcher, Frederick; Ferrero, Andrea (January 2015). "Rotation Period Determination for 978 Aidamina". The Minor Planet Bulletin. 42 (1): 28. Bibcode:2015MPBu...42...28P. ISSN 1052-8091. Retrieved 3 January 2016.
    11. ↑ "978 Aidamina (1922 LY)". Minor Planet Center. Retrieved 3 January 2016.
    12. ↑ "JPL Small-Body Database Search Engine: spec. type = PF (Tholen)". JPL Solar System Dynamics. Retrieved 3 January 2016.
    13. ↑ "JPL Small-Body Database Search Engine: spec. type = P (Tholen)". JPL Solar System Dynamics. Retrieved 3 January 2016.

    External links

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