_Swetlana.png) Modelled shape ofSwetlana from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | G. Neujmin |
| Discovery site | Simeiz Obs. |
| Discovery date | 15 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 arc | 102.46yr (37,424 d) |
| Aphelion | 3.9571AU |
| Perihelion | 2.2903 AU |
| 3.1237 AU | |
| Eccentricity | 0.2668 |
| 5.52 yr (2,016 d) | |
| 151.70° | |
| 0° 10m 42.6s / day | |
| Inclination | 6.1256° |
| 256.30° | |
| 126.44° | |
| Physical characteristics | |
| 29.867±0.009 h[9] | |
| 10.7[1][3] | |
882 Swetlana (prov. designation:A917 PBor1917 CM) is a darkbackground asteroid from the outer region of theasteroid belt. It was discovered on 15 August 1917, by Russian astronomerGrigory Neujmin at theSimeiz Observatory on the Crimean peninsula.[1] TheX-type asteroid has a longer-than averagerotation 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'sbackground population when applying thehierarchical clustering method to itsproper orbital elements.[4][5] It orbits the Sun in theouter 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 aneccentricity of 0.27 and aninclination of 6° with respect to theecliptic.[3] The body'sobservation arc begins on 18 August 1917, with its independent discovery atHeidelberg Observatory byMax Wolf, just three nights after its official discovery observation byGrigory Neujmin atSimeiz.[1]
Thisminor 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 ofnamed 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 between164 Eva and1514 Ricouxa and were discovered between 1876 and the 1930s, predominantly by astronomersAuguste Charlois,Johann Palisa,Max Wolf andKarl Reinmuth.[11]
In both the Tholen- and SMASS-like taxonomy of theSmall Solar System Objects Spectroscopic Survey (S3OS2),Swetlana is anX-type asteroid.[5][10]
In September 2017, a rotationallightcurve ofSwetlana was obtained fromphotometric observations byThomas A. Polakis at the Command Module Observatory (V02) in Arizona. Lightcurve analysis gave a well-definedrotation period of29.867±0.009 hours with a brightness variation of0.38±0.02magnitude (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 of0.17±0.05 magnitude (U=2−).[12][13]
According to the surveys carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer (WISE), the Infrared Astronomical SatelliteIRAS, and the JapaneseAkari satellite,Swetlana measures (42.440±0.313), (43.55±2.2) and (44.94±0.50) kilometers in diameter and its surface has analbedo of (0.062±0.011), (0.0588±0.006) and (0.056±0.002), respectively.[6][7][8] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0491 and a diameter of 43.47 kilometers based on anabsolute 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]
