14789 GAISH
{{Short description|Asteroid discovered in 1969}}
{{Use dmy dates|date=May 2018}}
{{Infobox planet
| minorplanet = yes
| name = 14789 GAISh
| background = #D6D6D6
| image =
| image_size =
| caption =
| discoverer = L. Chernykh
| discovery_site = {{nowrap|Crimean Astrophysical Obs.}}
| discovered = 8 October 1969
| mpc_name = (14789) GAISH
| alt_names = {{mp|1969 TY|1}}{{·}}{{mp|1995 KQ|2}}
{{mp|1996 QW|2}}{{·}}{{mp|1999 CH|69}}
| pronounced =
| named_after = Sternberg Astronomical Institute (GAISh)
{{small|(Moscow State University)}}
| mp_category = main-belt{{·}}{{small|(outer)}}
background
| epoch = 23 March 2018 (JD 2458200.5)
| uncertainty = 0
| observation_arc = 47.65 yr (17,405 d)
| aphelion = 3.4121 AU
| perihelion = 2.8333 AU
| semimajor = 3.1227 AU
| eccentricity = 0.0927
| period = 5.52 yr (2,016 d)
| mean_anomaly = 301.75°
| mean_motion = {{Deg2DMS|0.1786|sup=ms}} / day
| inclination = 5.8175°
| asc_node = 200.22°
| arg_peri = 161.64°
| mean_diameter = {{val|11.42|u=km}} {{small|(calculated)}}
{{val|15.256|0.211|ul=km}}
| rotation = {{val|8.086|0.0032|ul=h}}
| albedo = {{val|0.057}} {{small|(assumed)}}
{{val|0.076|0.017}}
| spectral_type = C {{small|(assumed)}}
| abs_magnitude = 12.5
12.8
{{val|12.990|0.008}} {{small|(R)}}
13.44
}}
14789 GAISh, provisional designation {{mp|1969 TY|1}}, is a dark background asteroid from the outer regions of the asteroid belt, approximately {{convert|15|km|mi|abbr=off|sigfig=1|sp=us}} 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. The assumed C-type asteroid has a rotation period of 8.1 hours and possibly an elongated shape. It was named for the Russian Sternberg Astronomical Institute (GAISh) of Moscow State University.
Orbit and classification
GAISh is a non-family asteroid from the main belt's background population. 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. The body's observation arc begins with its official discovery observation in October 1969.
Physical characteristics
GAISh is an assumed carbonaceous C-type asteroid.
= 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 ({{small|U=2}}).
= 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. 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.
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. The official naming citation was published by the Minor Planet Center on 6 January 2007 ({{small|M.P.C. 58595}}).
References
{{reflist|30em|refs=
|type = 2017-06-03 last obs.
|title = JPL Small-Body Database Browser: 14789 GAISH (1969 TY1)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2014789
|publisher = Jet Propulsion Laboratory
|access-date = 14 May 2018}}
|title = 14789 GAISH (1969 TY1)
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=14789
|access-date = 14 May 2018}}
|title = MPC/MPO/MPS Archive
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html
|access-date = 14 May 2018}}
|display-authors = 6
|first1 = Joseph R. |last1 = Masiero
|first2 = A. K. |last2 = Mainzer
|first3 = T. |last3 = Grav
|first4 = J. M. |last4 = Bauer
|first5 = R. M. |last5 = Cutri
|first6 = J. |last6 = Dailey
|first7 = P. R. M. |last7 = Eisenhardt
|first8 = R. S. |last8 = McMillan
|first9 = T. B. |last9 = Spahr
|first10 = M. F. |last10 = Skrutskie
|first11 = D. |last11 = Tholen
|first12 = R. G. |last12 = Walker
|first13 = E. L. |last13 = Wright
|first14 = E. |last14 = DeBaun
|first15 = D. |last15 = Elsbury
|first16 = T. IV |last16 = Gautier
|first17 = S. |last17 = Gomillion
|first18 = A. |last18 = Wilkins
|date = November 2011
|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 20
|bibcode = 2011ApJ...741...68M
|doi = 10.1088/0004-637X/741/2/68
|arxiv = 1109.4096
|s2cid = 118745497 }}
|title = Asteroid 14789 GAISH – Proper Elements
|publisher = AstDyS-2, Asteroids – Dynamic Site
|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=14789
|access-date= 29 October 2019}}
|title = LCDB Data for (14789) GAISH
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=14789%7CGAISH
|access-date = 14 May 2018}}
|display-authors = 6
|first1 = A. |last1 = Mainzer
|first2 = T. |last2 = Grav
|first3 = J. |last3 = Masiero
|first4 = E. |last4 = Hand
|first5 = J. |last5 = Bauer
|first6 = D. |last6 = Tholen
|first7 = R. S. |last7 = McMillan
|first8 = T. |last8 = Spahr
|first9 = R. M. |last9 = Cutri
|first10 = E. |last10 = Wright
|first11 = J. |last11 = Watkins
|first12 = W. |last12 = Mo
|first13 = C. |last13 = Maleszewski
|date = November 2011
|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results
|journal = The Astrophysical Journal
|volume = 741
|issue = 2
|page = 25
|bibcode = 2011ApJ...741...90M
|doi = 10.1088/0004-637X/741/2/90
|arxiv = 1109.6407
|s2cid = 35447010 }} ([http://iopscience.iop.org/0004-637X/741/2/68/fulltext/apj398969t1_mrt.txt catalog])
|display-authors = 6
|first1 = Adam |last1 = Waszczak
|first2 = Chan-Kao |last2 = Chang
|first3 = Eran O. |last3 = Ofek
|first4 = Russ |last4 = Laher
|first5 = Frank |last5 = Masci
|first6 = David |last6 = Levitan
|first7 = Jason |last7 = Surace
|first8 = Yu-Chi |last8 = Cheng
|first9 = Wing-Huen |last9 = Ip
|first10 = Daisuke |last10 = Kinoshita
|first11 = George |last11 = Helou
|first12 = Thomas A. |last12 = Prince
|first13 = Shrinivas |last13 = Kulkarni
|date = September 2015
|title = Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry
|journal = The Astronomical Journal
|volume = 150
|issue = 3
|page = 35
|bibcode = 2015AJ....150...75W
|doi = 10.1088/0004-6256/150/3/75
|arxiv = 1504.04041
|s2cid = 8342929 }}
}}
External links
- [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
- [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books
- [https://www.minorplanetcenter.net/iau/lists/NumberedMPs010001.html Discovery Circumstances: Numbered Minor Planets (10001)-(15000)] – Minor Planet Center
- {{AstDys|14789}}
- {{JPL small body}}
{{Minor planets navigator | |number=14789 |14790 Beletskij}}
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