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Asteroids with Satellites Database--Johnston's Archive
(53110) 1999 AR7
compiled by Wm. Robert Johnston
last updated18 March 2016--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:NEA, Amor
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.644494591 AU | | orbital periodP: | yr
(= 770.2773027 d) | | eccentricitye: | 0.214430826 | | perihelion distanceq: | 1.291864257 AU | | aphelion distanceQ: | 1.9971249248 AU | | inclinationi: | 40.627067° | | argument of perihelionω: | 58.22642° | | ascending nodeΩ: | 85.4560058° | | mean anomalyM: | 339.898887° | | perihelion passageTP: | 2016 Feb 25.009532 | | Epoch: | 2016 Jan 13 | | data arc: | 1998-2016(648 obs.) | | Earth MOID: | 0.409728 AU | | Jupiter Tisserand invariantTJ: | 3.998 |
orbital data, secondary: | semimajor axisas: | 3.8 km[*E] | | separation/primary radiusas/rp: | 5.4 [*E] | | separation/Hill radiusas/rH: | 0.026 [*E] | | orbital periodPs: | 1.305± 0.0008d [W16a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 16.7[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 1.5 km [*E] | | geometric albedo: | (0.16) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 140 km [*E] |
other data, primary: | diameterdp: | 1.4 km [*E] | | rotation periodRPp: | 2.7375± 0.0005h [W16a] | | amplitude in mag., rotationalΔM: | 0.1 [W16a] | | amplitude in mag., mutual eventsΔM: | 0.185 ±0.015 [W16a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >0.6km [*E] | | diameter ratiods/dp: | >0.41± 0.02 [W16a] | | component mag. differenceΔM: | <1.9 [*D] | | rotation periodRPs: | ? | |
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--(53110) 1999 AR7 --discovery and notes:
Primary discovered1999 Jan 11from Socorro, New Mexico, USAby LINEAR Program.Linked to prediscovery observations from 1998 Nov 28.Permanent number assigned 2003 Feb 16.
Companion discovered2015 Dec 19 by B. D. Warnerusinglightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA.Announced2016 Mar [W16a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2016by Wm. Robert Johnston.
Last modified18 March 2016.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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