_Ostanina.png) Shape model ofOstanina from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | P. Shajn |
| Discovery site | Simeiz Obs. |
| Discovery date | 27 August 1935 |
| Designations | |
| (1369) Ostanina | |
Named after | Ostanin[2] (Discoverer's birthplace) |
| 1935 QB · 1928 FE | |
| main-belt[1][3] · (outer) Meliboea[4] | |
| Orbital characteristics[3] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 90.58yr (33,086 d) |
| Aphelion | 3.7770AU |
| Perihelion | 2.4627 AU |
| 3.1198 AU | |
| Eccentricity | 0.2106 |
| 5.51 yr (2,013 d) | |
| 110.16° | |
| 0° 10m 44.04s / day | |
| Inclination | 14.365° |
| 180.46° | |
| 127.84° | |
| Physical characteristics | |
| 40.59±0.62 km[5] 41.24±4.1 km[6] 42.401±0.162 km[7][8] 43.561±0.266 km[9] | |
| 8.4001±0.0002 h[10] | |
| 0.0490[9] 0.052[7][8] 0.0545[6] 0.061[5] | |
| Caa/Ch(S3OS2)[11] C(SDSS-MOC)[12] | |
| 10.7[1][3][5][6][7][9] | |
1369 Ostanina (prov. designation:1935 QB) is a dark and elongatedasteroid of theMeliboea family, located in the outer region of theasteroid belt. It was discovered on 27 August 1935, by Soviet astronomerPelageya Shajn at theSimeiz Observatory on the Crimean peninsula.[1] The hydrated carbonaceousC-type asteroid has arotation period of 8.4 hours and measures approximately 42 kilometers (26 miles) in diameter.[13] It was named for the Russian village ofOstanin, birthplace of the discoverer.[2]
Ostanina orbits the Sun in theouter main-belt at a distance of 2.5–3.8 AU once every 5 years and 6 months (2,013 days;semi-major axis of 3.12 AU). Its orbit has aneccentricity of 0.21 and aninclination of 14° with respect to theecliptic.[3]
Based on thehierarchical clustering method (HCM) using the asteroid'sproper orbital elements,Ostanina is a member of theMeliboea family (604),[4] a smallerasteroid family of a few hundred carbonaceous outer-belt asteroids. The family was named after its lowest-numbered member,137 Meliboea.[14]: 23 In an alternative HCM-analysis, however,Ostanina is an asteroid of the main belt'sbackground population.[15] The body'sobservation arc begins with its first observation as1928 FE at theHeidelberg Observatory in March 1928, more than 7 years prior to its official discovery observation atSimeiz–Crimea.[1]
Thisminor planet was named after the small village ofOstanin, the birthplace of the discoverer,Pelageya Shajn. The village is located inPerm Krai, now part of the RussianVolga district.[2] The officialnaming citation was published by theMinor Planet Center in November 1952 (M.P.C. 838;LDS).[16]
In both the Tholen- and SMASS-like taxonomy of theSmall Solar System Objects Spectroscopic Survey (S3OS2),Ostanina is a hydratedC-type asteroid (Caa and Ch),[4][11] while in theSDSS-based taxonomy, the asteroid is a common C-type.[12]
In June 2011, a rotationallightcurve ofOstanina was obtained fromphotometric observations by French and Swiss astronomersPierre Antonini,François Colas, Valery Lainey, Laurène Beauvalet andRaoul Behrend. Lightcurve analysis gave arotation period of8.4001±0.0002 hours with a very high brightness variation of 1.11magnitude (U=3).[10] A high brightness amplitude is indicative of a non-spheroidal, elongated shape. Other well defined rotation periods of 8.399 and 8.397 hours were obtained byRobert Stephens at the Center for Solar System Studies (U81) in California in 2017, and by V. G. Shevchenko at the Kharkov Observatory (101) in 1996, respectively (U=3/3).[17][a][b]
Additional period determinations: 6+ hours by Jean-Gabriel Bosch at the Collonges Observatory (178) (U=2),[10] 6.145 hours at theCatania andPino Torinese observatories in 2000 (U=1),[18] 8.3945 hours byRené Roy in 2016 (U=3-),[10] 8.397 hours by V. G. Chiorny in 2003 and 2007 (U=n.a./2+),[19][c] and 8.4 hours by Roberto Crippa and Federico Manzini at the Sozzago Astronomical Station (A12) in 2010 (U=2+).[10]
According to the surveys carried out by the Infrared Astronomical SatelliteIRAS, the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Ostanina measures between 40.6 and 43.6 kilometers in diameter and its surface has analbedo between 0.049 and 0.061.[5][6][7][8][9] TheCollaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0545 and diameter of 41.24 kilometers using anabsolute magnitude of 10.7.[13]
