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Asteroids with Satellites Database--Johnston's Archive
2015 RB280
compiled by Wm. Robert Johnston
last updated15 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:TNO, Cubewano
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 43.771 AU | | orbital periodP: | 289.59 yr
(= 105773 d) | | eccentricitye: | 0.0749 | | perihelion distanceq: | 40.491 AU | | aphelion distanceQ: | 47.05 AU | | inclinationi: | 2.1775° | | argument of perihelionω: | 111.03° | | ascending nodeΩ: | 201.6332° | | mean anomalyM: | 54.72° | | perihelion passageTP: | 1975 Apr 21 | | Epoch: | 2019 Apr 27 | | data arc: | 2015-2017(27 obs.) | | Earth MOID: | 39.4771 AU | | Jupiter Tisserand invariantTJ: | 5.899 | | Neptune Tisserand invariantTN: | 3.09148171189863 [*D] |
orbital data, secondary: | semimajor axisas: | 6700± 60 km (separation) [G19c] | | separation/primary radiusas/rp: | 130 [*E] | | separation/Hill radiusas/rH: | 0.019 [*E] | | orbital periodPs: | 160d [*E] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 7.6[MPC]
7.9 ± 0.5 [G19c] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 134 km [*E] | | geometric albedo: | (0.09) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1 g/cm3) [*A] | | Hill radiusrH: | 350000 km [*E] |
other data, primary: | diameterdp: | 107 km [*E] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 81km [*E] | | diameter ratiods/dp: | 0.76 [*D] | | component mag. differenceΔM: | 0.6 [G19c] | | rotation periodRPs: | ? | |
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-- 2015 RB280 --discovery and notes:
Primary discovered2015 Sep 08from Mauna Kea Observatory, Hawaii, USAby Solar System Origins Legacy Survey (A. H. Parker et al.).Linked to prediscovery observations from 2015 Jun 23.
Companion discovered2019 Oct 08 by Solar System Origins Legacy Survey (A. H. Parker et al.)usingHubble Space Telescope observations from Hubble Space Telescope.Announced2019 Nov 05 [G19c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2019by Wm. Robert Johnston.
Last modified15 December 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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