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Asteroids with Satellites Database--Johnston's Archive
(7187) Isobe
compiled by Wm. Robert Johnston
last updated18 December 2023--Orbital and physical data--
(Seethis page for definitions of quantities; source codes in brackets, seethis link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:main belt asteroid, inner
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.937433295 AU | | orbital periodP: | 2.696797524 yr
(= 985.0052955 d) | | eccentricitye: | 0.086375239 | | perihelion distanceq: | 1.770087031 AU | | aphelion distanceQ: | 2.10477956 AU | | inclinationi: | 21.78873043° | | argument of perihelionω: | 86.20439375° | | ascending nodeΩ: | 315.3421135° | | mean anomalyM: | 173.6226989° | | perihelion passageTP: | 2013 Feb 01.9464 | | Epoch: | 2014 May 23 | | data arc: | 1985-2014(685 obs.) | | Earth MOID: | 0.863359 AU | | Jupiter Tisserand invariantTJ: | 3.815 |
orbital data, secondary: | semimajor axisas: | 11 km[*E] | | separation/primary radiusas/rp: | 3.7 [*E] | | separation/Hill radiusas/rH: | 0.013 [*E] | | orbital periodPs: | 0.7329± 0.0002d [W23f] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 13.9[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 6.05± 1.46 km [M12b] | | geometric albedo: | 0.134± 0.104[M12b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 820 km [*E] |
other data, primary: | diameterdp: | 5.97± 1.46 km [*D] | | rotation periodRPp: | 4.244± 0.0002h [W23f] | | amplitude in mag., rotationalΔM: | 0.19 [W23f] | | amplitude in mag., mutual eventsΔM: | 0.12 [W23f] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.96± 0.29km [*D] | | diameter ratiods/dp: | 0.16± 0.03 [W17a] | | component mag. differenceΔM: | 4.0± 0.4 [*D] | | rotation periodRPs: | ? | |
|
--(7187) Isobe --discovery and notes:
Primary discovered1992 Jan 30from Palomar Observatory, California, USAby E. F. Helin.Alternate designation(s):1992 BW, 1985 QC3.Linked to prediscovery observations from 1985 Aug 20.Permanent number assigned 1996 Sep 27.
Named 2001 Nov 01 for Syuzo Isobe (1942-) [MPC043762].
Companion discovered2012 Aug 26 by B. D. Warnerusinglightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA.Announced2013 Jan [W13b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2013, Minor Planet BulletinRounding Up the Unusual Suspects
- Warner, Brian D. 2011, Minor Planet BulletinAsteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 December- 2011 March
- Warner, Brian D. 2008, Minor Planet BulletinAsteroid Lightcurve Analysis at the Palmer Divide Observatory: September-December 2007
- Warner, Brian D. 2005, Minor Planet BulletinLightcurve analysis for asteroids 242, 893, 921, 1373, 1853, 2120, 2448 3022, 6490, 6517, 7187, 7757, and 18108
©2013-2017, 2023by Wm. Robert Johnston.
Last modified18 December 2023.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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