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Asteroids with Satellites Database--Johnston's Archive
(285571) 2000 PQ9
compiled by Wm. Robert Johnston
last updated9 October 2021--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: | 1.9039009231 AU | | orbital periodP: | 2.6270389785 yr
(= 959.5441091 d) | | eccentricitye: | 0.431968771 | | perihelion distanceq: | 1.081475182 AU | | aphelion distanceQ: | 2.7263266641 AU | | inclinationi: | 13.4765408° | | argument of perihelionω: | 6.935496° | | ascending nodeΩ: | 297.2124165° | | mean anomalyM: | 350.321809° | | perihelion passageTP: | 2021 Jul 26.796253 | | Epoch: | 2021 Jul 01 | | data arc: | 2000-2021(4421 obs.) | | Earth MOID: | 0.067072 AU | | Jupiter Tisserand invariantTJ: | 3.794 |
orbital data, secondary: | semimajor axisas: | ? | | orbital periodPs: | ? | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 17.6[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 1.4± 0.78/0.38 km [N21c] | | geometric albedo: | 0.041± 0.038/0.024[N21c] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 118 km [*E] |
other data, primary: | diameterdp: | 1.4± 0.78/0.38 km [N21c] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | ? | | diameter ratiods/dp: | ? | | component mag. differenceΔM: | ? | | rotation periodRPs: | ? | |
|
--(285571) 2000 PQ9 --discovery and notes:
Primary discovered2000 Aug 09from Socorro, New Mexico, USAby LINEAR Program.Permanent number assigned 2011 Sep 12.
Companion discovered2021 Julusingradar observations from Goldstone Observatory, California, USA.Announced2021 Aug [B21g].
--Links, more technical:
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--Links to ADS abstracts:
©2021, 2021by Wm. Robert Johnston.
Last modified9 October 2021.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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