_Valyaev.png) Shape model ofValyaev from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 8 February 1967 |
| Designations | |
| (3962) Valyaev | |
Named after | Valerij Valyaev(Russian astronomer)[2] |
| 1967 CC · 1973 GL1 1976 UT10 · 1982 XE1 1984 DC2 | |
| main-belt · Themis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 60.92 yr (22,251 days) |
| Aphelion | 3.5778AU |
| Perihelion | 2.8406 AU |
| 3.2092 AU | |
| Eccentricity | 0.1148 |
| 5.75yr (2,100 days) | |
| 293.47° | |
| 0° 10m 17.04s / day | |
| Inclination | 1.9984° |
| 49.683° | |
| 106.16° | |
| Physical characteristics | |
| 14.76±1.11 km[4] 16.285±0.231 km[5][6] | |
| 16.4399±0.0077 h[3][7] | |
| 0.08(assumed)[3] 0.088±0.014[5][6] 0.089±0.014[4] | |
| C(assumed)[3] | |
| 12.2[5] · 12.4[1][4] · 12.403±0.005(R)[7] · 12.56±0.19[8] · 12.85[3] | |
3962 Valyaev (prov. designation:1967 CC) is a darkThemistian asteroid from the outer region of theasteroid belt. The presumedC-type asteroid has arotation period of 16.4 hours and measures approximately 15 kilometers (9.3 miles) in diameter. It was discovered on 8 February 1967, by Russian astronomerTamara Smirnova atNauchnyj on the Crimean peninsula, and later named after Russian astronomerValerij Valyaev.[2][9]
TheC-type asteroid is a member of theThemis family, a dynamical family ofouter-belt asteroids with nearly coplanarecliptical orbits. It orbits the Sun at a distance of 2.8–3.6 AU once every 5 years and 9 months (2,100 days). Its orbit has aneccentricity of 0.11 and aninclination of 2° with respect to theecliptic.[1] A firstprecovery was obtained atPalomar Observatory in 1956, extending the asteroid'sobservation arc by 11 years prior to its discovery.[9]
Thisminor planet was named after Russian astronomer Valerij Valyaev (b. 1944), chief of the Ephemeris Astronomy Department at the Institute for Theoretical Astronomy (ITA), which was then part of theUSSR Academy of Sciences inLeningrad. The minor planet1735 ITA is named after this institute. Valyaev is also the senior editor of the periodicalsMorskoj Astronomicheskij Ezhegodnik andAviatsionnyj Astronomicheskij Ezhegodnik. The asteroids's name was proposed by ITA,[2] and itsofficial naming citation was published by theMinor Planet Center on 18 December 1994(M.P.C. 24410).[10]
In September 2010, a rotationallightcurve ofValyaev was obtained fromphotometric observations by thePalomar Transient Factory survey in California. Lightcurve analysis gave arotation period of16.4399 hours with a brightness amplitude of 0.44magnitude (U=2).[7]
According to the surveys carried out by the JapaneseAkari satellite and theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Valyaev measures 14.76 and 16.3 kilometers in diameter and its surface has a lowalbedo of 0.088 and 0.089, respectively.[4][5][6] TheCollaborative Asteroid Lightcurve Link (CALL) assumes an albedo for carbonaceous asteroids of 0.08 and calculates a smaller diameter of 12.6 kilometers with anabsolute magnitude of 12.85.[3]
