Asteroids with Satellites Database--Johnston's Archive
(399774)
2005 NB7
compiled by Wm. Robert Johnston
last updated
20 September 2014
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this 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 axis a: |
2.044466396 AU
| |
orbital period P: |
2.923332180 yr
(= 1067.747079 d)
| |
eccentricity e: |
0.517082099
| |
perihelion distance q: |
0.987309420 AU
| |
aphelion distance Q: |
3.101623372 AU
| |
inclination i: |
12.6910441°
| |
argument of perihelion ω: |
348.128040°
| |
ascending node Ω: |
199.2199453°
| |
mean anomaly M: |
36.023919°
| |
perihelion passage TP: |
2014 Feb 05.15434
| |
Epoch: |
2014 May 23
| |
data arc: |
2001-2011
(750 obs.)
| |
Earth MOID: |
0.00659889 AU
| |
Jupiter Tisserand invariant TJ: |
3.592
|
orbital data, secondary:
|
semimajor axis as: |
0.6
km
(separation)
[S08a]
| |
separation/primary radius as/rp: | 2.4 [*E] | |
separation/Hill radius as/rH: | 0.015 [*E] | |
orbital period Ps: |
0.6367
± 0.0004
d [K08a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
18.7
[MPC]
18.933 ± 0.545 [JPL]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.54
km [*D]
| |
geometric albedo: |
0.2
[*E]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
39 km [*E]
|
other data, primary:
|
diameter dp: |
0.5
± 0.1
km [S08a]
| |
rotation period RPp: |
3.4883
± 0.0001
h [K08a]
| |
amplitude in mag., rotational ΔM: |
0.15
± 0.05
[V08a]
| |
amplitude in mag., mutual events ΔM: | 0.26 ±0.26 [V08a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.2
± 0.1
km [S08a]
| |
diameter ratio ds/dp: |
>0.32
[K08a]
| |
component mag. difference ΔM: |
<2.5
[*D]
| |
rotation period RPs: |
15.267
± 0.094
h [V08a]
| |
|
|
--
(399774) 2005 NB7
--discovery and notes:
Primary discovered
2005 Jul 05
from
Catalina Station, Arizona, USA
by
Catalina Sky Survey.
Linked to prediscovery observations from 2001 Dec 18.
Permanent number assigned 2014 Jul 12.
Companion discovered
2008 Apr 11
by M. K. Shepard, M. C. Nolan, L. A. M. Benner, J. D. Giorgini, S. J. Ostro, and C. Magri
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2008 Apr 17 [S08a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Vander Haagen, Gary A. 2008, Minor Planet Bulletin Lightcurve of Binary Minor Planet 2005 NB7
- Somers, James M., Hicks, M. D., & Lawrence, K. J. 2008, Bulletin of the American Astronomical Society Optical Characterization of Planetary Radar Targets
- Kusnirak, P., Pravec, P., Galad, A., Kornos, L., Cooney, W., Gross, J., & Terrell, D. 2008, Central Bureau Electronic Telegrams 2005 NB_7
- Shepard, M. K., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Ostro, S. J., & Magri, C. 2008, International Astronomical Union Circular 2005 NB_7
©
2008, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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