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Asteroids with Satellites Database--Johnston's Archive
(488453) 1994 XD
compiled by Wm. Robert Johnston
last updated14 May 2017--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:NEA, Apollo(PHA)
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.347124733 AU | | orbital periodP: | 3.595940168 yr
(= 1313.4171460 d) | | eccentricitye: | 0.733373708 | | perihelion distanceq: | 0.625805165 AU | | aphelion distanceQ: | 4.068444300 AU | | inclinationi: | 4.312022° | | argument of perihelionω: | 249.295287° | | ascending nodeΩ: | 96.257008° | | mean anomalyM: | 160.4340578° | | perihelion passageTP: | 2012 Oct 14.675438 | | Epoch: | 2014 May 23 | | data arc: | 1994-2013(294 obs.) | | Earth MOID: | 0.0200722 AU | | Jupiter Tisserand invariantTJ: | 3.127 |
orbital data, secondary: | semimajor axisas: | 0.6± 0.3 km (separation) [B05a] | | separation/primary radiusas/rp: | 2.0 [*E] | | separation/Hill radiusas/rH: | 0.020 [*E] | | orbital periodPs: | 0.749± 0.00025d [W13c] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 19.1[MPC]
19.11 [JPL] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 0.62 km [*D] | | geometric albedo: | 0.1[*E] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 29 km [*E] |
other data, primary: | diameterdp: | 0.6± 0.15 km [B05a] | | rotation periodRPp: | 2.736± 0.001h [W13c] | | amplitude in mag., rotationalΔM: | ? | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | >0.15km [B05a] | | diameter ratiods/dp: | 0.25 [*D] | | component mag. differenceΔM: | 3.0 [* D] | | rotation periodRPs: | ? | |
|
--(488453) 1994 XD --discovery and notes:
Primary discovered1994 Dec 01from Steward Observatory, Kitt Peak, Arizona, USAby Spacewatch. Permanent number assigned 10 May 2017.
Companion discovered2005 Jun 24 by L. A. M. Benner, M. C. Nolan, S. J. Ostro, J. D. Giorgini, J. L. Margot, and C. Magriusingradar observations from Arecibo Observatory, Puerto Rico.Announced2005 Jul 11 [B05a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Warner, Brian D. 2013, Minor Planet BulletinSeeing Double Old and New: Observations and Lightcurve Analysis at the Palmer Divide Observatory of Six Binary Asteroids
- Benner, L. A. M. 2006, Society for Astronomical Sciences Annual SymposiumArecibo and Goldstone Radar Imaging of Near-Earth and Main-Belt Asteroids in 2005
- Benner, L. A. M., Nolan, M. C., Ostro, S. J., Giorgini, J. D., Margot, J. L., & Magri, C. 2005, International Astronomical Union Circular1994 XD
- Trentman, R., Blythe, M., Shelly, F., Bezpalko, M., Huber, R., Manguso, L., Torres, D., Kracke, R., McCleary, M., Stange, H., Milner, A., Stuart, J., Sayer, R., Evans, J., Kommers, J., Larson, S. M., Beshore, E. C., Casey, C. M., Christensen, E. J., Garradd, G. J., Grauer, A., Hill, R. E., McNaught, R. H., Jacques, C., Pimentel, E., & Spahr, T. B. 2005, Minor Planet Electronic Circulars1994 XD
- Nakamura, A., Gehrels, T., Scotti, J. V., & Marsden, B. G. 1994, Minor Planet Electronic Circulars1994 XD
- Gehrels, T. & Marsden, B. G. 1994, Minor Planet Electronic Circulars1994 XD
©2005-2014, 2017by Wm. Robert Johnston.
Last modified14 May 2017.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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