Contents

882 Swetlana

882 Swetlana

Modelled shape of Swetlana from its lightcurve
Discovery [1]
Discovered by	G. Neujmin
Discovery site	Simeiz Obs.
Discovery date	15 August 1917
Designations
MPC designation	(882) Swetlana
Named after	unknown [2]
Alternative designations	A917 PB · 1967 TQ 1917 CM
Minor planet category	main-belt [1][3] · (outer) background [4][5]
Orbital characteristics [3]
Epoch 31 May 2020 (JD 2459000.5)
Uncertainty parameter 0
Observation arc	102.46 yr (37,424 d)
Aphelion	3.9571 AU
Perihelion	2.2903 AU
Semi-major axis	3.1237 AU
Eccentricity	0.2668
Orbital period (sidereal)	5.52 yr (2,016 d)
Mean anomaly	151.70°
Mean motion	0° 10m 42.6s / day
Inclination	6.1256°
Longitude of ascending node	256.30°
Argument of perihelion	126.44°
Physical characteristics
Mean diameter	42.440±0.313 km[6] 43.55±2.2 km[7] 44.94±0.50 km[8]
Synodic rotation period	29.867±0.009 h[9]
Geometric albedo	0.056±0.002[8] 0.0588±0.006[7] 0.062±0.011[6]
Spectral type	X (S3OS2-TH)[10] X (S3OS2-BB)[10]
Absolute magnitude (H)	10.7[1][3]

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]

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 ObservatorybyMax Wolf, just three nights after its official discovery observation by Grigory NeujminatSimeiz.^[1]

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

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]

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]

In September 2017, a rotational lightcurveofSwetlana was obtained from photometric observations by Thomas A. Polakis at the Command Module Observatory (V02) in Arizona. Lightcurve analysis gave a well-defined rotation periodof29.867±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]

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]

• Lightcurve Database Query (LCDB), at www.minorplanet.info
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Geneva Observatory, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 882 SwetlanaatAstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 882 Swetlana at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters