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Asteroids with Satellites Database--Johnston's Archive
(2449) Kenos
compiled by Wm. Robert Johnston
last updated29 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:Mars crossing asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.909047502 AU | | orbital periodP: | 2.637698196 yr
(= 963.4374618 d) | | eccentricitye: | 0.168238351 | | perihelion distanceq: | 1.587872499 AU | | aphelion distanceQ: | 2.2302225049 AU | | inclinationi: | 24.982612° | | argument of perihelionω: | 102.258123° | | ascending nodeΩ: | 179.863854° | | mean anomalyM: | 244.821506° | | perihelion passageTP: | 2015 Oct 13.242433 | | Epoch: | 2014 Dec 09 | | data arc: | 1978-2015(905 obs.) | | Earth MOID: | 0.712267 AU | | Jupiter Tisserand invariantTJ: | 3.808 |
orbital data, secondary: | semimajor axisas: | 52 km[*E] | | separation/primary radiusas/rp: | 34 [*E] | | separation/Hill radiusas/rH: | 0.14 [*E] | | orbital periodPs: | 0.6604± 0.0004d [W15h] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 14.26[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 3.17 km [A17c] | | geometric albedo: | 0.348[*A17] | | color indexU-B: | 0.356[JPL] | | color indexB-V: | 0.684[JPL] | | taxonomic type: | E (Tholen) [JPL] | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 380 km [*E] |
other data, primary: | diameterdp: | 3.09 km [*D] | | rotation periodRPp: | 3.8481± 0.0003h [W15h] | | amplitude in mag., rotationalΔM: | 0.14± 0.02 [W15h] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.71km [*D] | | diameter ratiods/dp: | 0.23 [W17a] | | component mag. differenceΔM: | 3.2 [*D] | | rotation periodRPs: | 15.85± 0.01h [W15h] | |
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--(2449) Kenos --discovery and notes:
Primary discovered1978 Apr 08from Cerro Tololo Observatory, La Serena, Chileby W. Liller.Alternate designation(s):1978 GC.Permanent number assigned 1981 Oct 01.
Named 1993 Feb 06 for the South American mythological first man [MPC021606].
Companion discovered2015 Feb 27 by B. D. Warnerusinglightcurve observations from Palmer Divide Station, Eaton, Colorado, United States.Announced2015 Jun [W15h].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©2015-2017, 2019by Wm. Robert Johnston.
Last modified29 May 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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