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Asteroids with Satellites Database--Johnston's Archive
(612141) 1999 XY143
compiled by Wm. Robert Johnston
last updated10 April 2022--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: | 43.224 AU | | orbital periodP: | 284.181 yr
(= 103797.0 d) | | eccentricitye: | 0.07770 | | perihelion distanceq: | 39.866 AU | | aphelion distanceQ: | 46.582 AU | | inclinationi: | 7.15229° | | argument of perihelionω: | 83.02° | | ascending nodeΩ: | 255.39896° | | mean anomalyM: | 108.28° | | perihelion passageTP: | 1928 Nov 29 | | Epoch: | 2014 May 23 | | data arc: | 1999-2008(26 obs.) | | Earth MOID: | 38.8633 AU | | Jupiter Tisserand invariantTJ: | 5.823 | | Neptune Tisserand invariantTN: | 3.07 [*D] |
orbital data, secondary: | semimajor axisas: | 2670± 70 km (separation) [G12b] | | separation/primary radiusas/rp: | 25 [*E] | | separation/Hill radiusas/rH: | 0.0040 [*E] | | orbital periodPs: | 14d [*E] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 6[MPC]
6.006 ± 0.565 [JPL] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 278 km [*E] | | geometric albedo: | (0.09) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1 g/cm3) [*A] | | Hill radiusrH: | 660000 km [*E] |
other data, primary: | diameterdp: | 213 km [*E] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 179km [*E] | | diameter ratiods/dp: | 0.839 [N09b] | | component mag. differenceΔM: | 0.38 [N09b] | | rotation periodRPs: | ? | |
|
--(612141) 1999 XY143 --discovery and notes:
Primary discovered1999 Dec 14from Whipple Observatory, Mt. Hopkins, Arizona, USAby C. W. Hergenrother. Permanent number assigned 28 Mar 2022.
Companion discovered2008 Sep 19 by K. S. Noll, W. M. Grundy, S. D. Benecchi, and H. A. LevisonusingHubble Space Telescope observations from Hubble Space Telescope.Announced2009 Sep 24 [N09b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Noll, K. S., Grundy, W. M., Benecchi, S. D., & Levison, H. A. 2009, International Astronomical Union Circular1999 XY_143, 1999 RY_214, and 2002 VT_130
©2009-2014, 2022by Wm. Robert Johnston.
Last modified10 April 2022.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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