7187 Isobe
| Discovery Synodic rotation period | 2.440±0.002 h[9] 2.58±0.01 h[10] 4.241±0.006 h[11] 4.2427±0.002 h[5] 4.2432±0.0005 h[12] | |
|---|---|---|
| 0.093±0.027[13] 0.12±0.09[6] 0.134±0.104[8] 0.167±0.094[7] 0.3 (assumed)[4] | ||
| E [4] | ||
| 13.89[8] · 13.90[7] · 14.0[1][4] · 14.50[6] | ||
7187 Isobe, provisional designation 1992 BW, is a likely
Eleanor Helin at Palomar Observatory in California, United States.[3] It is named after Japanese astronomer Syuzo Isobe.[2]
Classification and orbit
The presumed
Hungaria family, which form the innermost dense concentration of asteroids in the Solar System.[3][4] Isobe orbits the Sun in the inner main-belt at a distance of 1.8–2.1 AU once every 2 years and 8 months (985 days). Its orbit has an eccentricity of 0.09 and an inclination of 22° with respect to the ecliptic.[1] It was first identified as 1985 QC3 at the discovery observatory in 1985, extending the body's observation arc by 7 years prior to its official discovery observation.[3]
According to the survey carried out by NASA's
albedo between 0.12 and 0.167.[6][7][8] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.30 – a compromise value between 0.4 and 0.2, corresponding to the Hungaria asteroids both as family and orbital group – and calculates a diameter of 3.85 kilometers with an absolute magnitude of 14.0.[4]
Moon and lightcurve
Since August 2004, American astronomer
U=3), after initial photometric observations indicated a shorter period solution of 2.4 hours.[5]
In 2012, observations by Brian Warner also indicated that Isobe is very likely a synchronous binary asteroid, orbited by a minor-planet moon every 33 hours. The size of this satellite remains unknown and no secondary-to-primary diameter ratio has been published. Isobe's binary nature still needs further observations.
Isobe was also observed by American astronomer
U=3-).[11]
Naming
The asteroid has been named after
M.P.C. 43762).[15]
References
- ^ a b c d e "JPL Small-Body Database Browser: 7187 Isobe (1992 BW)" (2016-04-01 last obs.). Jet Propulsion Laboratory. Retrieved 4 July 2017.
- ^ ISBN 978-3-540-00238-3.
- ^ a b c d "7187 Isobe (1992 BW)". Minor Planet Center. Retrieved 10 March 2017.
- ^ a b c d e f g h "LCDB Data for (7187) Isobe". Asteroid Lightcurve Database (LCDB). Retrieved 10 March 2017.
- ^ PMID 32455349. Retrieved 10 March 2017.
- ^ .
- ^ S2CID 9341381. Retrieved 10 March 2017.
- ^ S2CID 46350317. Retrieved 10 March 2017.
- ISSN 1052-8091. Retrieved 10 March 2017.
- ISSN 1052-8091. Retrieved 10 March 2017.
- ^ ISSN 1052-8091. Retrieved 10 March 2017.
- ISSN 1052-8091. Retrieved 10 March 2017.
- hdl:11336/213855.
- ^ "Syuzo ISOBE". IAU – International Astronomical Union. Retrieved 8 October 2015.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 March 2017.
External links
- Lightcurve plot of 7187 Isobe, Center for Solar System Studies, R. D. Stephens (2015)
- Lightcurve plot of 7187 Isobe, Palmer Divide Observatory, B. D. Warner (2011)
- (7187) Isobe, datasheet, johnstonsarchive.net
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- 7187 Isobe at AstDyS-2, Asteroids—Dynamic Site
- 7187 Isobe at the JPL Small-Body Database
