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Asteroids with Satellites Database--Johnston's Archive
(489486) 2007 GS3
compiled by Wm. Robert Johnston
last updated12 December 2019--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, Apollo(PHA)
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.0611815916 AU | | orbital periodP: | 1.0931620879 yr
(= 399.2849936 d) | | eccentricitye: | 0.129111834 | | perihelion distanceq: | 0.9241704897 AU | | aphelion distanceQ: | 1.1981926935 AU | | inclinationi: | 15.0912982° | | argument of perihelionω: | 61.149342° | | ascending nodeΩ: | 215.4308761° | | mean anomalyM: | 302.861517° | | perihelion passageTP: | 2019 Jun 29.373719 | | Epoch: | 2019 Apr 27 | | data arc: | 2007-2019(444 obs.) | | Earth MOID: | 0.021594 AU | | Jupiter Tisserand invariantTJ: | 5.768 |
orbital data, secondary: | semimajor axisas: | 3.2 km[*E] | | separation/primary radiusas/rp: | 6.6 [*E] | | separation/Hill radiusas/rH: | 0.044 [*E] | | orbital periodPs: | 1.723± 0.004d [P19d] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 19.4[MPC]
19.21 ± 0.15 [P19d] | | slope parameterG: | (0.12) [*A] | | effective diameterdE: | 1.067± 0.414/0.216 km [N18a] | | geometric albedo: | 0.02± 0.019/0.01[N18a] | | color indexU-B: | ? | | color indexB-V: | ? | | color indexV-R: | 0.34 ± 0.011 [P19d] | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 72 km [*E] |
other data, primary: | diameterdp: | 0.97± 0.38/0.2 km [*D] | | rotation periodRPp: | 3.497± 0.001h [P19d] | | amplitude in mag., rotationalΔM: | 0.06 [P19d] | | amplitude in mag., mutual eventsΔM: | 0.265 ±0.055 [P19d] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.45km [*D] | | axial ratiosa/b, b/c: | 1.4;? [P19d] | | diameter ratiods/dp: | >0.46 [P19d] | | component mag. differenceΔM: | 1.7 [*D] | | rotation periodRPs: | 41.36± 0.1h [P19d] | |
|
--(489486) 2007 GS3 --discovery and notes:
Primary discovered2007 Apr 11from Siding Spring, New South Wales, Australiaby Siding Spring Survey.Permanent number assigned 2017 May 10.
Companion discovered2019 Oct 30 by P. Pravec, P. Kusnirak, K. Hornoch, P. Fatka, and H. Kucakovausinglightcurve observations from La Silla station, European Southern Observatory.Announced2019 Dec 06 [P19d].
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--Links to ADS abstracts:
©2019, 2019by Wm. Robert Johnston.
Last modified12 December 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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