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Asteroids with Satellites Database--Johnston's Archive
(505447) 2013 SQ99
compiled by Wm. Robert Johnston
last updated17 August 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:TNO, Cubewano
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 44.1154 AU | | orbital periodP: | 293.02 yr
(= 107024.5 d) | | eccentricitye: | 0.09531 | | perihelion distanceq: | 39.9109 AU | | aphelion distanceQ: | 48.3199 AU | | inclinationi: | 3.47165° | | argument of perihelionω: | 176.5° | | ascending nodeΩ: | 51.9396° | | mean anomalyM: | 142.07° | | perihelion passageTP: | 1903 Sep 08.4 | | Epoch: | 2019 Apr 27 | | data arc: | 2008-2017(56 obs.) | | Earth MOID: | 38.9012 AU | | Jupiter Tisserand invariantTJ: | 5.904 |
orbital data, secondary: | semimajor axisas: | 13300± 500 km (separation) [F17a] | | separation/primary radiusas/rp: | 140 [*E] | | separation/Hill radiusas/rH: | 0.022 [*E] | | orbital periodPs: | 200d [*E] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 6.4[MPC]
6.7 ± 0.5 [G19c] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 231 km [*E] | | geometric albedo: | (0.09) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1 g/cm3) [*A] | | Hill radiusrH: | 610000 km [*E] |
other data, primary: | diameterdp: | 180 km [*E] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 146km [*E] | | diameter ratiods/dp: | 0.81± 0.03 [F17a] | | component mag. differenceΔM: | 0.46 [*D] | | rotation periodRPs: | ? | |
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--(505447) 2013 SQ99 --discovery and notes:
Primary discovered2013 Aug 05from Mauna Kea Observatory, Hawaii, USAby Outer Solar System Origins Survey.Linked to prediscovery observations from 2008 Sep 06.Permanent number assigned 2017 Nov 04.
Companion discovered by Fraser, W. C., et al.usingadaptive optics telescope observations.Announced2017 Apr 04 [F17a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2019by Wm. Robert Johnston.
Last modified17 August 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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