_Patsayev.png) Shape model ofPatsayev from itslightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | T. Smirnova |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 4 September 1967 |
| Designations | |
| (1791) Patsayev | |
Named after | Viktor Patsayev(cosmonaut)[2] |
| 1967 RE · 1931 TW3 1943 GS · 1943 GZ 1948 JO · 1948 KA 1957 JG · 1957 KS 1958 RC | |
| main-belt · (middle) | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.79 yr (30,970 days) |
| Aphelion | 3.1351AU |
| Perihelion | 2.3603 AU |
| 2.7477 AU | |
| Eccentricity | 0.1410 |
| 4.55yr (1,664 days) | |
| 48.980° | |
| 0° 12m 59.04s / day | |
| Inclination | 5.3689° |
| 198.89° | |
| 74.431° | |
| Physical characteristics | |
| Dimensions | 25.69 km(derived)[3] 29.394±0.114 km[4] 29.446±0.287 km[5] 31.50±0.37 km[6] |
| 19.809±0.013h[7] | |
| 0.030±0.004[5] 0.034±0.006[6] 0.0390±0.0076[4] 0.0465(derived)[3] | |
| C[3] | |
| 11.8[4][6] · 11.9[1][3] | |
1791 Patsayev (prov. designation:1967 RE) is a darkbackground asteroid from the central region of theasteroid belt, approximately 26 kilometers in diameter. It was discovered on 4 September 1967, by Russian astronomerTamara Smirnova at theCrimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[8] The asteroid was named after cosmonautViktor Patsayev.[2]
The darkC-type asteroid orbits the Sun in thecentral main-belt at a distance of 2.4–3.1 AU once every 4 years and 7 months (1,664 days). Its orbit has aneccentricity of 0.14 and aninclination of 5° with respect to theecliptic.[1]Patsayev was first identified as1931 TW3 atLowell Observatory in 1931, extending the body'sobservation arc by 36 years prior to its official discovery observation.[8]
In April 2016, a rotationallightcurve ofPatsayev was obtained from photometric observations taken by Sydney Black at the Oakley Southern Sky Observatory in Coonabarabran, Australia. It gave a well-definedrotation period of 19.809 hours with a brightness variation of 0.28 inmagnitude (U=3).[7]
According to the survey carried out by NASA'sWide-field Infrared Survey Explorer with its subsequentNEOWISE mission,Patsayev measures between 29.39 and 31.50 kilometers in diameter, and its surface has a highalbedo between 0.030 and 0.039.[4][5][6] TheCollaborative Asteroid Lightcurve Link (CALL) disagrees with the results found by WISE. CALL derives a much lower carbonaceous albedo of 0.046, and calculates a diameter of 25.69 kilometers with anabsolute magnitude of 11.9.[3]
Thisminor planet was named in honor of Russian–Soviet cosmonautViktor Patsayev (1933–1971), test Engineer of theSoyuz 11 spacecraft, who died on his first spaceflight on 30 June 1971 during the vehicle's return to Earth after completing the flight program of the first crewed orbital station,Salyut. The lunar craterPatsaev is also named after him. The precedingly numbered minor planets1789 Dobrovolsky and1790 Volkov were named in honour of his dead crew members.[2]
The names of all three cosmonauts are also engraved on the plaque next to the sculpture of theFallen Astronaut on the Moon, which was placed there during theApollo 15 mission, containing the names of eight American astronauts and six Soviet cosmonauts, who had all died in service. The officialnaming citation was published by theMinor Planet Center on 1 July 1972 (M.P.C. 3296).[9]
