882 Swetlana

882 Swetlana (prov. designation: A917 PB or 1917 CM) is a dark background asteroid from the outer region of the asteroid belt. It was discovered on 15 August 1917, by Russian astronomer Grigory Neujmin at the Simeiz Observatory on the Crimean peninsula.[1] The X-type asteroid has a longer-than average rotation period of 29.9 hours and measures approximately 42 kilometers (26 miles) in diameter. The origin of the asteroid's name remains unknown.[2]

882 Swetlana
Modelled shape of Swetlana from its lightcurve
Discovery [1]
Discovered byG. Neujmin
Discovery siteSimeiz Obs.
Discovery date15 August 1917
Designations
(882) Swetlana
Named after
unknown [2]
A917 PB · 1967 TQ
1917 CM
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc102.46 yr (37,424 d)
Aphelion3.9571 AU
Perihelion2.2903 AU
3.1237 AU
Eccentricity0.2668
5.52 yr (2,016 d)
151.70°
0° 10m 42.6s / day
Inclination6.1256°
256.30°
126.44°
Physical characteristics
Mean diameter
  • 42.440±0.313 km[6]
  • 43.55±2.2 km[7]
  • 44.94±0.50 km[8]
29.867±0.009 h[9]
  • 0.056±0.002[8]
  • 0.0588±0.006[7]
  • 0.062±0.011[6]
10.7[1][3]

    Orbit and classification

    Swetlana is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements.[4][5] It orbits the Sun in the outer asteroid belt at a distance of 2.3–4.0 AU once every 5 years and 6 months (2,016 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.27 and an inclination of 6° with respect to the ecliptic.[3] The body's observation arc begins on 18 August 1917, with its independent discovery at Heidelberg Observatory by Max Wolf, just three nights after its official discovery observation by Grigory Neujmin at Simeiz.[1]

    Naming

    This minor planet is named after a Feminine Russian first name. Any reference of this name to a person or occurrence is unknown.[2]

    Unknown meaning

    Among the many thousands of named minor planets, Swetlana is one of 120 asteroids, for which no official naming citation has been published. All of these low-numbered asteroids have numbers between 164 Eva and 1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomers Auguste Charlois, Johann Palisa, Max Wolf and Karl Reinmuth.[11]

    Physical characteristics

    In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Swetlana is an X-type asteroid.[5][10]

    Rotation period

    In September 2017, a rotational lightcurve of Swetlana was obtained from photometric observations by Thomas A. Polakis at the Command Module Observatory (V02) in Arizona. Lightcurve analysis gave a well-defined rotation period of 29.867±0.009 hours with a brightness variation of 0.38±0.02 magnitude (U=3).[9] The result supersedes an observations by Italian amateur astronomers Roberto Crippa and Federico Manzini at the Sozzago Astronomical Station (A12) from September 2006, which tentatively determined a period of more than 20 hours and an amplitude of 0.17±0.05 magnitude (U=2−).[12][13]

    Diameter and albedo

    According to the surveys carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer (WISE), the Infrared Astronomical Satellite IRAS, and the Japanese Akari satellite, Swetlana measures (42.440±0.313), (43.55±2.2) and (44.94±0.50) kilometers in diameter and its surface has an albedo of (0.062±0.011), (0.0588±0.006) and (0.056±0.002), respectively.[6][7][8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0491 and a diameter of 43.47 kilometers based on an absolute magnitude of 10.7.[13] Alternative measurements published by the WISE team include mean-diameters of (39.014±0.412 km) and (39.346±0.766 km) with corresponding albedos of (0.0733±0.0177) and (0.072±0.012).[5][13]

    References
    1. "882 Swetlana (A917 PB)". Minor Planet Center. Retrieved 27 February 2020.
    2. Schmadel, Lutz D. (2007). "(882) Swetlana". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 80. doi:10.1007/978-3-540-29925-7_883. ISBN 978-3-540-00238-3.
    3. "JPL Small-Body Database Browser: 882 Swetlana (A917 PB)" (2020-02-03 last obs.). Jet Propulsion Laboratory. Retrieved 27 February 2020.
    4. "Asteroid 882 Swetlana – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 27 February 2020.
    5. "Asteroid 882 Swetlana". Small Bodies Data Ferret. Retrieved 27 February 2020.
    6. 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.
    7. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 27 February 2020.
    8. 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)
    9. Polakis, Tom (April 2018). "Lightcurve Analysis for Seven Main-belt Asteroids" (PDF). Minor Planet Bulletin. 45 (2): 112–115. Bibcode:2018MPBu...45..112P. ISSN 1052-8091. Archived from the original (PDF) on 12 February 2020. Retrieved 27 February 2020.
    10. Lazzaro, D.; Angeli, C. A.; Carvano, J. M.; Mothé-Diniz, T.; Duffard, R.; Florczak, M. (November 2004). "S3OS2: the visible spectroscopic survey of 820 asteroids" (PDF). Icarus. 172 (1): 179–220. Bibcode:2004Icar..172..179L. doi:10.1016/j.icarus.2004.06.006. Retrieved 27 February 2020.
    11. Schmadel, Lutz D. (2007). "Appendix 11 – Minor Planet Names with Unknown Meaning". Dictionary of Minor Planet Names – Fifth Revised and Enlarged revision. Springer Berlin Heidelberg. pp. 927–929. ISBN 978-3-540-00238-3.
    12. Behrend, Raoul. "Asteroids and comets rotation curves – (882) Swetlana". Geneva Observatory. Retrieved 27 February 2020.
    13. "LCDB Data for (882) Swetlana". Asteroid Lightcurve Database (LCDB). Retrieved 27 February 2020.
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