Astronomy:14789 GAISH
| 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 | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 3.4121 AU |
| |{{{apsis}}}|helion}} | 2.8333 AU |
| 3.1227 AU | |
| Eccentricity | 0.0927 |
| Orbital period | 5.52 yr (2,016 d) |
| Mean anomaly | 301.75° |
| Mean motion | 0° 10m 42.96s / day |
| Inclination | 5.8175° |
| Longitude of ascending node | 200.22° |
| 161.64° | |
| Physical characteristics | |
| Mean diameter | 11.42 km (calculated)[3] 15.256±0.211 km[5][6] |
| Rotation period | 8.086±0.0032 h[7] |
| Geometric albedo | 0.057 (assumed)[3] 0.076±0.017[5][6] |
| C (assumed)[3] | |
| Absolute magnitude (H) | 12.5[6] 12.8[2] 12.990±0.008 (R)[7] 13.44[3] |
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]
Orbit and classification
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]
Physical characteristics
GAISh is an assumed carbonaceous C-type asteroid.[3]
Rotation period
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 ({{{1}}}).[3][7]
Diameter and albedo
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]
Naming
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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "14789 GAISH (1969 TY1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=14789.
- ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: 14789 GAISH (1969 TY1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014789.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 "LCDB Data for (14789) GAISH". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=14789%7CGAISH.
- ↑ 4.0 4.1 "Asteroid 14789 GAISH – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=14789.
- ↑ 5.0 5.1 5.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M.
- ↑ 6.0 6.1 6.2 6.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. (catalog)
- ↑ 7.0 7.1 7.2 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
External links
- Asteroid Lightcurve Database (LCDB), query form (info )
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (10001)-(15000) – Minor Planet Center
- 14789 GAISH at AstDyS-2, Asteroids—Dynamic Site
- 14789 GAISH at the JPL Small-Body Database
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