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Asteroids with Satellites Database--Johnston's Archive
2020 BX12
compiled by Wm. Robert Johnston
last updated7 February 2020--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: | 1.5997 AU | | orbital periodP: | 2.0233 yr
(= 739 d) | | eccentricitye: | 0.52686 | | perihelion distanceq: | 0.756893 AU | | aphelion distanceQ: | 2.4426 AU | | inclinationi: | 40.078° | | argument of perihelionω: | 70.52° | | ascending nodeΩ: | 132.9045° | | mean anomalyM: | 336.002° | | perihelion passageTP: | 2020 Mar 21.27 | | Epoch: | 2020 Feb 01 | | data arc: | 2020 Jan-2020 Feb(126 obs.) | | Earth MOID: | 0.00201896 AU | | Jupiter Tisserand invariantTJ: | 3.974 |
orbital data, secondary: | semimajor axisas: | >0.36 km[V20a] | | separation/primary radiusas/rp: | 4.4 [*E] | | separation/Hill radiusas/rH: | 0.036 [*E] | | orbital periodPs: | 1.96± 0.08d [V20a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 0[MPC]
20.59 ± 0.3 [JPL] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 0.18 km [V20a] | | geometric albedo: | 0.3[V20a] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 10 km [*E] |
other data, primary: | diameterdp: | >0.165 km [V20a] | | rotation periodRPp: | <2.8h [V20a] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >0.07km [V20a] | | diameter ratiods/dp: | 0.42 [*D] | | component mag. differenceΔM: | 1.9 [*D] | | rotation periodRPs: | <49h [V20a] | |
|
-- 2020 BX12 --discovery and notes:
Primary discovered2020 Jan 27from Mauna Kea, Hawaii, USAby ATLAS-MLO.
Companion discovered2020 Feb 04 by A. K. Virkki, L. F. Zambrano-Marin, S. E. Marshall, D. C. Hickson, and P. A. Taylorusingradar observations from Arecibo Observatory, Puerto Rico.Announced2020 Feb 07 [V20a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2020by Wm. Robert Johnston.
Last modified7 February 2020.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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