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Asteroids with Satellites Database--Johnston's Archive
(524366) 2001 XR254
compiled by Wm. Robert Johnston
last updated27 May 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: | 42.7866 AU | | orbital periodP: | 279.873 yr
(= 102225.7 d) | | eccentricitye: | 0.037161 | | perihelion distanceq: | 41.1966 AU | | aphelion distanceQ: | 44.3766 AU | | inclinationi: | 1.230713° | | argument of perihelionω: | 78.7861° | | ascending nodeΩ: | 180.05° | | mean anomalyM: | 226.0482° | | perihelion passageTP: | 2123 Jun 18.0 | | Epoch: | 2019 Apr 27 | | data arc: | 2001-2018(112 obs.) | | Earth MOID: | 40.1814 AU | | Jupiter Tisserand invariantTJ: | 5.851 | | Neptune Tisserand invariantTN: | 3.086 [*D] |
orbital data, secondary: | semimajor axisas: | 9311± 52 km[G19b] | | separation/primary radiusas/rp: | 110 [*D] | | separation/Hill radiusas/rH: | 0.017 [*D] | | orbital periodPs: | 125.579± 0.048d [G19b] | | eccentricityes: | 0.5561± 0.0047[G19b] | | inclinationis: | 41.08° ± 0.22° [G19b] | | ascending nodeΩs: | 341.19° ± 0.29° [G19b] | | argument of pericenterωs: | 246.29° ± 0.93° [G19b] | | mean anomalyM: | 151.97° ± 0.29° [G19b] | | Epoch: | 2007 Jul 18.5 | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 5.9[MPC]
6.05 ± 0.15 [V14a] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 221± 41/71 km [V14a] | | geometric albedo: | 0.136± 0.168/0.044[V14a] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | 4.06x1018 ± 4.8x1016kg [G19b] | | densityρ: | 1± 0.96/0.56 g/cm3[V14a] | | Hill radiusrH: | 540000 km [*D] |
other data, primary: | diameterdp: | 171± 32/55 km [V14a] | | color indexV-I: | 1.04 ± 0.11 [B08d] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 140± 26/45km [V14a] | | diameter ratiods/dp: | 0.826± 0.024 [G09a] | | component mag. differenceΔM: | 0.415± 0.064 [G09a] | | color indexV-I: | 1.06± 0.12 [B08d] | | rotation periodRPs: | ? | |
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--(524366) 2001 XR254 --discovery and notes:
Primary discovered2001 Dec 10from Mauna Kea Observatory, Hawaii, USAby D. C. Jewitt, S. S. Sheppard, and J. Kleyna.Permanent number assigned 2019 May 18.
Companion discovered2006 Dec 20usingHubble Space Telescope observations from Hubble Space Telescope.Announced2007 Mar 14.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Grundy, W. M., Noll, K. S., Buie, M. W., Benecchi, S. D., Stephens, D. C., & Levison, H. F. 2009, IcarusMutual orbits and masses of six transneptunian binaries
- Noll, Keith S., Grundy, William M., Chiang, Eugene I., Margot, Jean-Luc, & Kern, Susan D. 2007, ArXiv Astrophysics e-printsBinaries in the Kuiper Belt
- Sheppard, S. S. & Marsden, B. G. 2002, Minor Planet Electronic Circulars2001 XR254
©2007-2015, 2019by Wm. Robert Johnston.
Last modified27 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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