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Asteroids with Satellites Database--Johnston's Archive
[hst5]
compiled by Wm. Robert Johnston
last updated20 September 2014--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
orbital data, primary (osculating elements)[F10b]: | semimajor axisa: | 42.9 AU | | orbital periodP: | 280 yr
(= 102000 d) | | eccentricitye: | ? | | perihelion distanceq: | ? AU | | aphelion distanceQ: | ? AU | | inclinationi: | 3.5° | | argument of perihelionω: | ?° | | ascending nodeΩ: | ?° | | mean anomalyM: | ?° | | perihelion passageTP: | ? | | Epoch: | N/A | | data arc: | 2005 Aug 3(3 obs.) | | Earth MOID: | ? AU | | Jupiter Tisserand invariantTJ: | ? |
orbital data, secondary: | semimajor axisas: | 16400± 1600 km (separation) [F10b] | | separation/primary radiusas/rp: | 240 [*E] | | separation/Hill radiusas/rH: | 0.034 [*E] | | orbital periodPs: | 1000d [*E] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 0[MPC]
6.8 ± 0.3 [F10b] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 190 km [*E] | | geometric albedo: | (0.09) [*A] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1 g/cm3) [*A] | | Hill radiusrH: | 500000 km [*E] |
other data, primary: | diameterdp: | 135 km [*E] | | rotation periodRPp: | ? | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 135km [*E] | | diameter ratiods/dp: | 1.0 [*D] | | component mag. differenceΔM: | 0.1 [F10b] | | rotation periodRPs: | ? | |
|
-- [hst5] --discovery and notes:
Primary discovered2005 Aug 03from Hubble Space Telescopeby C. I. Fuentes, M. J. Holman, D. E. Trilling, and P. Protopapas.
Companion discovered2005 Aug 03 by C. I. Fuentes, M. J. Holman, D. E. Trilling, and P. ProtopapasusingHubble Space Telescope observations from Hubble Space Telescope.Announced2010 Oct 01 [F10b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2010, 2014by Wm. Robert Johnston.
Last modified20 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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