Asteroids with Satellites Database--Johnston's Archive
(162000)
1990 OS
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: |
1.678430687 AU
| |
orbital period P: |
2.174519563 yr
(= 794.2432702 d)
| |
eccentricity e: |
0.462390415
| |
perihelion distance q: |
0.902340425 AU
| |
aphelion distance Q: |
2.454520949 AU
| |
inclination i: |
1.0950767°
| |
argument of perihelion ω: |
21.40535°
| |
ascending node Ω: |
346.63851°
| |
mean anomaly M: |
317.3414428°
| |
perihelion passage TP: |
2014 Aug 25.11464
| |
Epoch: |
2014 May 23
| |
data arc: |
1990-2013
(348 obs.)
| |
Earth MOID: |
0.00910508 AU
| |
Jupiter Tisserand invariant TJ: |
4.107
|
orbital data, secondary:
|
semimajor axis as: |
0.6
km
(separation)
[O03a]
| |
separation/primary radius as/rp: | 4.0 [*E] | |
separation/Hill radius as/rH: | 0.028 [*E] | |
orbital period Ps: |
0.875
± 0.125
d [O03a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
19.3
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
0.3
km [*D]
| |
geometric albedo: |
0.36
[*E]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
21 km [*E]
|
other data, primary:
|
diameter dp: |
0.3
± 0.02
km [O03a]
| |
rotation period RPp: |
2.536
± 0.000
h [B03a]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.05
± 0.02
km [O03a]
| |
diameter ratio ds/dp: |
0.167
± 0.068
[*D]
| |
component mag. difference ΔM: |
3.9
[* D]
| |
rotation period RPs: |
?
| |
|
|
--
(162000) 1990 OS
--discovery and notes:
Primary discovered
1990 Jul 21
from
Palomar Observatory, California, USA
by
E. F. Helin.
Permanent number assigned 2007 Sep 26.
Companion discovered
2003 Nov 05
by S. J. Ostro, M. C. Nolan, L. A. M. Benner, J. D. Giorgini, J. L. Margot, and C. Magri
using
radar
observations from Arecibo Observatory, Puerto Rico.
Announced
2003 Nov 10 [O03a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Ostro, S. J., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Margot, J. L., & Magri, C. 2003, International Astronomical Union Circular 1990 OS
- Ostro, S. J., Nolan, M. C., Benner, L. A. M., Giorgini, J. D., Margot, J. L., & Magri, C. 2003, Central Bureau Electronic Telegrams 1990 OS
- 1990, Yamamoto Circular Minor planets.
- McNaught, R. H. & Williams, G. V. 2003, Minor Planet Circulars 1990 OS
- Green, D. W. E. 1990, International Astronomical Union Circular 1990 OS
- Balam, D. D., Tatum, J. B., Gilmore, A. C., & Kilmartin, P. M. 1990, International Astronomical Union Circular 1990 OS
- Helin, E., Roman, B., Lawrence, K., Michaud, J., Holt, H. E., & Levy, D. H. 1990, International Astronomical Union Circular 1990 OS
©
2003-2007, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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