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Asteroids with Satellites Database--Johnston's Archive
(4029) Bridges
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:main belt asteroid
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.525421064 AU | | orbital periodP: | 4.013367228 yr
(= 1465.882380 d) | | eccentricitye: | 0.130959059 | | perihelion distanceq: | 2.19469430 AU | | aphelion distanceQ: | 2.856147829 AU | | inclinationi: | 5.4370864° | | argument of perihelionω: | 16.672823° | | ascending nodeΩ: | 214.796995° | | mean anomalyM: | 353.163485° | | perihelion passageTP: | 2014 Jun 19.8375 | | Epoch: | 2014 May 23 | | data arc: | 1974-2014(1385 obs.) | | Earth MOID: | 1.18506 AU | | Jupiter Tisserand invariantTJ: | 3.436 |
orbital data, secondary: | binary dynamical type: | A [P07f] | | semimajor axisas: | 13 km[*E] | | separation/primary radiusas/rp: | 3.3 [*E] | | separation/Hill radiusas/rH: | 0.0097 [*E] | | orbital periodPs: | 0.6796± 0.0004d [H06d] | | eccentricityes: | ? | | normalized ang. mom.αL: | 0.81[P07f] |
| other data, system (combined):| absolute mag.H: | 12.8[MPC] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 8.02± 0.07 km [M11b] | | geometric albedo: | 0.201± 0.015[M11b] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 1300 km [*E] |
other data, primary: | diameterdp: | 7.8± 0.07 km [*D] | | rotation periodRPp: | 3.5746± 0.0001h [H06d] | | amplitude in mag., rotationalΔM: | 0.20 [H06d] | | amplitude in mag., mutual eventsΔM: | 0.09 ±0.03 [H06d] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 1.87± 0.16km [*D] | | diameter ratiods/dp: | 0.24± 0.02 [H06d] | | component mag. differenceΔM: | 3.1± 0.2 [*D] | | rotation periodRPs: | ? | |
|
--(4029) Bridges --discovery and notes:
Primary discovered1982 May 24from Palomar Observatory, California, USAby C. S. Shoemaker.Alternate designation(s):1982 KC1, 1974 HS2, 1975 TQ, 1978 AF, 1978 JJ2, 1982 OX, 1986 JF.Linked to prediscovery observations from 1974 Apr 24.Permanent number assigned 1989 Mar 22.
Named 1989 Dec 12 for Patricia M. Bridges [MPC15575].
Companion discovered2006 Apr 11 by D. Higgins, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, and R. Stephensusinglightcurve observations from Canberra, Australia; Ondrejov Observatory, Czech Republic; Sonoita Research Observatory, Sonoita, Arizona, USA; Yucca Valley, California, USA.Announced2006 May 08 [H06d].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, David, Oey, Julian, & Pravec, Petr 2011, Minor Planet BulletinPeriod Determination of Binary Asteroid Targets Observed at Hunters Hill Observatory: May-September 2009
- Higgins, D., Pravec, P., Kusnirak, P., Cooney, W., Gross, J., Terrell, D., & Stephens, R. 2006, Central Bureau Electronic Telegrams(4029) Bridges
©2006-2008, 2014by Wm. Robert Johnston.
Last modified21 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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