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Asteroids with Satellites Database--Johnston's Archive
(3873) Roddy
compiled by Wm. Robert Johnston
last updated21 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:Mars crossing asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 1.892048452 AU | | orbital periodP: | 2.602594950 yr
(= 950.5978056 d) | | eccentricitye: | 0.133696579 | | perihelion distanceq: | 1.63908805 AU | | aphelion distanceQ: | 2.145008858 AU | | inclinationi: | 23.3549639° | | argument of perihelionω: | 267.548484° | | ascending nodeΩ: | 250.077283° | | mean anomalyM: | 46.394575° | | perihelion passageTP: | 2014 Jan 20.49282 | | Epoch: | 2014 May 23 | | data arc: | 1953-2014(1037 obs.) | | Earth MOID: | 0.787255 AU | | Jupiter Tisserand invariantTJ: | 3.847 |
orbital data, secondary: | semimajor axisas: | 14 km[*E] | | separation/primary radiusas/rp: | 3.9 [*E] | | separation/Hill radiusas/rH: | 0.015 [*E] | | orbital periodPs: | 0.8017± 0.0008d [W12a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 12.7[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 7.51± 0.25 km [U11a] | | geometric albedo: | 0.512± 0.039[U11a] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | S (SMASSII) [JPL] | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 930 km [*E] |
other data, primary: | diameterdp: | 7.25± 0.24 km [*D] | | rotation periodRPp: | 2.47900± 0.00006h [W13b] | | amplitude in mag., rotationalΔM: | 0.11 [W13b] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.96± 0.16km [*D] | | diameter ratiods/dp: | 0.27± 0.02 [W12a] | | component mag. differenceΔM: | 2.8± 0.2 [*D] | | rotation periodRPs: | ? | |
|
--(3873) Roddy --discovery and notes:
Primary discovered1984 Nov 21from Palomar Observatory, California, USAby C. S. Shoemaker.Alternate designation(s):1984 WB, 1953 XK1.Linked to prediscovery observations from 1953 Dec 07.Permanent number assigned 1988 Aug 27.
Named 1989 Dec 12 for David J. Roddy [MPC15574].
Companion discovered2012 Aug 13 by B. D. Warnerusinglightcurve observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA.Announced2013 Jan [W13b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2013, Minor Planet BulletinRounding Up the Unusual Suspects
- Warner, Brian D. 2011, Minor Planet BulletinAsteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 September-December
- Warner, Brian D. 2009, Minor Planet BulletinAsteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 March-June
- Warner, Brian D. 2008, Minor Planet BulletinAsteroid Lightcurve Analysis at the Palmer Divide Observatory - June - October 2007
- Warner, Brian D. 2006, Minor Planet BulletinAsteroid lightcurve analysis at the Palmer Divide Observatory - late 2005 and early 2006
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System3873 Roddy CCD Spectrum
©2013, 2014by Wm. Robert Johnston.
Last modified21 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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