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Asteroids with Satellites Database--Johnston's Archive
(15822) Genefahnestock
compiled by Wm. Robert Johnston
last updated20 October 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:main belt asteroid, inner
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.9479736467 AU | | orbital periodP: | 2.7187834388 yr
(= 993.0544061 d) | | eccentricitye: | 0.079654835 | | perihelion distanceq: | 1.792808127 AU | | aphelion distanceQ: | 2.1031391661 AU | | inclinationi: | 22.0242221° | | argument of perihelionω: | 150.055048° | | ascending nodeΩ: | 190.8513456° | | mean anomalyM: | 31.582657° | | perihelion passageTP: | 2019 Jan 29.879733 | | Epoch: | 2019 Apr 27 | | data arc: | 1953-2018(1431 obs.) | | Earth MOID: | 0.802213 AU | | Jupiter Tisserand invariantTJ: | 3.802 |
orbital data, secondary: | semimajor axisas: | 3.3 km[*E] | | separation/primary radiusas/rp: | 3.9 [*E] | | separation/Hill radiusas/rH: | 0.014 [*E] | | orbital periodPs: | 0.8388± 0.0004d [W14a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 14.5[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 1.72± 0.3 km [M11b] | | geometric albedo: | 1± 0.18[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 240 km [*E] |
other data, primary: | diameterdp: | 1.69± 0.3 km [*D] | | rotation periodRPp: | 2.96± 0h [W14a] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >0.32± 0.07km [*D] | | diameter ratiods/dp: | >0.19± 0.02 [W14a] | | component mag. differenceΔM: | <3.6± 0.2 [*D] | | rotation periodRPs: | ? | |
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--(15822) Genefahnestock --discovery and notes:
Primary discovered1994 Oct 08from Palomar Observatory, California, USAby E. F. Helin.Alternate designation(s):1994 TV15, 1999 JL6.Linked to prediscovery observations from 1953 Aug 16.Permanent number assigned 2000 Jul 26.
Named 2019 Aug 27 for Eugene G. Fahnestock (1980-) [MPC115893].
Companion discovered2010 Jun 22usinglightcurve observations.Announced2010 Dec 20.
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--Links to ADS abstracts:
©2010-2014, 2019by Wm. Robert Johnston.
Last modified20 October 2019.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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