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Asteroids with Satellites Database--Johnston's Archive
(399774) 2005 NB7
compiled by Wm. Robert Johnston
last updated20 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:NEA, Apollo(PHA)
orbital data, primary (osculating elements)[JPL]: | semimajor axisa: | 2.044466396 AU | | orbital periodP: | 2.923332180 yr
(= 1067.747079 d) | | eccentricitye: | 0.517082099 | | perihelion distanceq: | 0.987309420 AU | | aphelion distanceQ: | 3.101623372 AU | | inclinationi: | 12.6910441° | | argument of perihelionω: | 348.128040° | | ascending nodeΩ: | 199.2199453° | | mean anomalyM: | 36.023919° | | perihelion passageTP: | 2014 Feb 05.15434 | | Epoch: | 2014 May 23 | | data arc: | 2001-2011(750 obs.) | | Earth MOID: | 0.00659889 AU | | Jupiter Tisserand invariantTJ: | 3.592 |
orbital data, secondary: | semimajor axisas: | 0.6 km (separation) [S08a] | | separation/primary radiusas/rp: | 2.4 [*E] | | separation/Hill radiusas/rH: | 0.015 [*E] | | orbital periodPs: | 0.6367± 0.0004d [K08a] | | eccentricityes: | ? | | normalized ang. mom.αL: | ? |
| other data, system (combined):| absolute mag.H: | 18.7[MPC]
18.933 ± 0.545 [JPL] | | slope parameterG: | (0.15) [*A] | | effective diameterdE: | 0.54 km [*D] | | geometric albedo: | 0.2[*E] | | color indexU-B: | ? | | color indexB-V: | ? | | taxonomic type: | ? | | massm: | ? | | densityρ: | (1.6 g/cm3) [*A] | | Hill radiusrH: | 39 km [*E] |
other data, primary: | diameterdp: | 0.5± 0.1 km [S08a] | | rotation periodRPp: | 3.4883± 0.0001h [K08a] | | amplitude in mag., rotationalΔM: | 0.15± 0.05 [V08a] | | amplitude in mag., mutual eventsΔM: | 0.26 ±0.26 [V08a] | | pole directionΒ, λ: | ?,? |
other data, secondary: | diameterds: | 0.2± 0.1km [S08a] | | diameter ratiods/dp: | >0.32 [K08a] | | component mag. differenceΔM: | <2.5 [*D] | | rotation periodRPs: | 15.267± 0.094h [V08a] | |
|
--(399774) 2005 NB7 --discovery and notes:
Primary discovered2005 Jul 05from Catalina Station, Arizona, USAby Catalina Sky Survey.Linked to prediscovery observations from 2001 Dec 18.Permanent number assigned 2014 Jul 12.
Companion discovered2008 Apr 11 by M. K. Shepard, M. C. Nolan, L. A. M. Benner, J. D. Giorgini, S. J. Ostro, and C. Magriusingradar observations from Arecibo Observatory, Puerto Rico.Announced2008 Apr 17 [S08a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Vander Haagen, Gary A. 2008, Minor Planet BulletinLightcurve of Binary Minor Planet 2005 NB7
- Somers, James M., Hicks, M. D., & Lawrence, K. J. 2008, Bulletin of the American Astronomical SocietyOptical Characterization of Planetary Radar Targets
- Kusnirak, P., Pravec, P., Galad, A., Kornos, L., Cooney, W., Gross, J., & Terrell, D. 2008, Central Bureau Electronic Telegrams2005 NB_7
- Shepard, M. K., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Ostro, S. J., & Magri, C. 2008, International Astronomical Union Circular2005 NB_7
©2008, 2014by Wm. Robert Johnston.
Last modified20 September 2014.Return toHome. Return toAstronomy and Space. Return toAsteroids with Satellites.
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