.png) Lightcurve-based 3D-model ofPakhmutova | |
| Discovery[1] | |
|---|---|
| Discovered by | L. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 24 January 1968 |
| Designations | |
| (1889) Pakhmutova | |
Named after | Aleksandra Pakhmutova (Russian composer)[2] |
| 1968 BE · 1942 JM 1966 US · 1969 JM | |
| main-belt · (outer)[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 50.53 yr (18,455 days) |
| Aphelion | 3.4349AU |
| Perihelion | 2.7452 AU |
| 3.0901 AU | |
| Eccentricity | 0.1116 |
| 5.43yr (1,984 days) | |
| 33.156° | |
| 0° 10m 53.04s / day | |
| Inclination | 13.183° |
| 55.153° | |
| 84.606° | |
| Physical characteristics | |
| Dimensions | 33.41 km(derived)[3] 33.53±1.8 km[4] 35.24±0.63 km[5] 35.45±10.87 km[6] 37.47±0.84 km[7] 37.68±14.19 km[8] |
| 17.490±0.004h[9][a] 17.5157±0.0005 h[10] 17.5226±0.0113 h[11] | |
| 0.05±0.04[8] 0.057±0.013[5] 0.0574(derived)[3] 0.06±0.09[6] 0.061±0.003[7] 0.0752±0.009[4] | |
| C[3] | |
| 10.80[4][7] · 10.969±0.002(R)[11] · 11.0[5][8] · 11.1[1][3] · 11.12[6] · 11.29±0.37[12] | |
1889 Pakhmutova, provisional designation1968 BE, is a carbonaceousasteroid from the outer region of theasteroid belt, approximately 35 kilometers in diameter.
It was discovered by Russian astronomerLyudmila Chernykh at theCrimean Astrophysical Observatory in Nauchnyj on 24 January 1968.[13] The asteroid was named after Russian composerAleksandra Pakhmutova.[2]
Pakhmutova orbits the Sun in theouter main-belt at a distance of 2.7–3.4 AU once every 5 years and 5 months (1,984 days). Its orbit has aneccentricity of 0.11 and aninclination of 13° with respect to theecliptic.[1] It was first identified as1942 JM atJohannesburg Observatory in 1942. Its first used observation was made in 1968, when it was identified as1966 US at the discovering observatory, extending the body'sobservation arc by 2 years prior to its official discovery observation.[13]
Pakhmutova has been characterized as a carbonaceousC-type asteroid.[3]
This asteroid has a mean-diameter between 33.53 and 37.68 kilometers, and analbedo between 0.05 and 0.0752, as measured by the space-basedAkari,IRAS andWISE/NEOWISE surveys.[4][5][6][7][8] TheCollaborative Asteroid Lightcurve Link derives an albedo of 0.0574 and a diameter of 33.41 kilometers with anabsolute magnitude of 11.1.[3]
In February 2006, a rotationallightcurve[a] was obtained by American astronomerBrian Warner at his Palmer Divide Observatory (716) in Colorado. Lightcurve analysis gave arotation period of 17.490 hours with a brightness variation of 0.50 inmagnitude (U=3-).[9] Photometric observations at thePalomar Transient Factory in February 2012, gave a period of 17.5226 hours and an amplitude of 0.49 magnitude (U=2).[11]
In 2011, a modeled lightcurve using data from the Uppsala Asteroid Photometric Catalogue (UAPC) and other sources gave a period 17.5157 hours, as well as a spin axis of (22.0°, –76.0°; 167.0°, –40.0°) inecliptic coordinates (λ, β) (U=2).[10]
Thisminor planet was named in honor of the Russian composerAleksandra Pakhmutova, one of the best known figures in Soviet and later Russian popular music.[2] The officialnaming citation was published by theMinor Planet Center on 20 February 1976 (M.P.C. 3936).[14]
