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Asteroid discovered in 1969 From Wikipedia, the free encyclopedia
14789 GAISh, provisional designation 1969 TY1, is a dark background asteroid from the outer regions of the asteroid belt, approximately 15 kilometers (9 miles) in diameter. It was discovered on 8 October 1969, by Soviet astronomer Lyudmila Chernykh of the Crimean Astrophysical Observatory at Nauchnij, on the Crimean peninsula.[1] The assumed C-type asteroid has a rotation period of 8.1 hours and possibly an elongated shape.[3] It was named for the Russian Sternberg Astronomical Institute (GAISh) of Moscow State University.[1]
Discovery[1] | |
---|---|
Discovered by | L. Chernykh |
Discovery site | Crimean Astrophysical Obs. |
Discovery date | 8 October 1969 |
Designations | |
(14789) GAISH | |
Named after | Sternberg Astronomical Institute (GAISh)[1] (Moscow State University) |
1969 TY1 · 1995 KQ2 1996 QW2 · 1999 CH69 | |
main-belt[1][2] · (outer)[3] background[4] | |
Orbital characteristics[2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 47.65 yr (17,405 d) |
Aphelion | 3.4121 AU |
Perihelion | 2.8333 AU |
3.1227 AU | |
Eccentricity | 0.0927 |
5.52 yr (2,016 d) | |
301.75° | |
0° 10m 42.96s / day | |
Inclination | 5.8175° |
200.22° | |
161.64° | |
Physical characteristics | |
11.42 km (calculated)[3] 15.256±0.211 km[5][6] | |
8.086±0.0032 h[7] | |
0.057 (assumed)[3] 0.076±0.017[5][6] | |
C (assumed)[3] | |
12.5[6] 12.8[2] 12.990±0.008 (R)[7] 13.44[3] | |
GAISh is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the outer asteroid belt at a distance of 2.8–3.4 AU once every 5 years and 6 months (2,016 days; semi-major axis of 3.12 AU). Its orbit has an eccentricity of 0.09 and an inclination of 6° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation in October 1969.[1]
GAISh is an assumed carbonaceous C-type asteroid.[3]
In October 2010, a rotational lightcurve of GAISh was obtained from photometric observations in the R-band by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 8.086 hours with a high brightness amplitude of 0.82 magnitude, indicative of a non-spherical shape (U=2).[3][7]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, GAISh measures 15.256 kilometers in diameter and its surface has an albedo of 0.076.[5][6] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 11.42 kilometers based on an absolute magnitude of 13.44.[3]
This minor planet was named after the Sternberg Astronomical Institute (GAISh, ГАИШ), a division of Moscow State University. Founded in 1931, it is one of Russia's leading astronomical institute and a principal educational facility for professional astronomers. The institute is located on the site of the 1931-built Sternberg Observatory.[1] The official naming citation was published by the Minor Planet Center on 6 January 2007 (M.P.C. 58595).[8]
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