Asteroids with Satellites Database--Johnston's Archive
(15430)
1998 UR31
compiled by Wm. Robert Johnston
last updated
21 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:
main belt asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.222085701 AU
| |
orbital period P: |
3.312450595 yr
(= 1209.872580 d)
| |
eccentricity e: |
0.170166932
| |
perihelion distance q: |
1.84396019 AU
| |
aphelion distance Q: |
2.600211209 AU
| |
inclination i: |
8.1796138°
| |
argument of perihelion ω: |
177.528729°
| |
ascending node Ω: |
62.812845°
| |
mean anomaly M: |
66.525170°
| |
perihelion passage TP: |
2013 Oct 11.42505
| |
Epoch: |
2014 May 23
| |
data arc: |
1955-2013
(960 obs.)
| |
Earth MOID: |
0.831536 AU
| |
Jupiter Tisserand invariant TJ: |
3.616
|
orbital data, secondary:
|
semimajor axis as: |
8.2
km
[*E]
| |
separation/primary radius as/rp: | 4.4 [*E] | |
separation/Hill radius as/rH: | 0.015 [*E] | |
orbital period Ps: |
0.9983
d [O13a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.74
± 0.03
km [M11b]
| |
geometric albedo: |
0.29
± 0.037
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
540 km [*E]
|
other data, primary:
|
diameter dp: |
3.74
± 0.03
km [M11b]
| |
rotation period RPp: |
2.5273
± 0.0002
h [O13a]
| |
amplitude in mag., rotational ΔM: |
0.10
± 0.04
[O13a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
?
| |
diameter ratio ds/dp: |
?
| |
component mag. difference ΔM: |
?
| |
rotation period RPs: |
23.96
h [O13a]
| |
|
|
--
(15430) 1998 UR31
--discovery and notes:
Primary discovered
1998 Oct 22
from
Xinglong, PR China
by
Beijing Schmidt CCD Asteroid Program.
Alternate designation(s):
1980 EK1, 2000 AB153.
Linked to prediscovery observations from 1955 Oct 25.
Permanent number assigned 2000 Jun 21.
Companion discovered
2010 Apr 22
by J. Oey, R. Ya. Inasaridze, O. I. Kvaratskhelia, V. Ayvazian, V. G. Chiorny, Yu. N. Krugly, I. E. Molotov, B. D. Warner, P. Pravec, P. Kusnirak, D. Higgins, J. Pollock, J. Haislip, K. Ivarsen, D. Reichart, A. LaCluyze, and A. Galad
using
lightcurve
observations.
Announced
2013 Jul [O13a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Oey, Julian, Inasaridze, Raguli Ya., Kvaratskhelia, Otar I., Ayvazian, Vova, Chirony, Vasilij G., Krugly, Yurij N., Molotov, Igor E., Warner, Brian D., Pravec, Petr, Kusnirák, Peter, Higgins, David, Pollock, Joseph, Haislip, Joshua, Ivarsen, Kevin, Reichart, Daniel, Lacluyze, Aaron, & Galád, Adrian 2013, Minor Planet Bulletin Lightcurve Analysis is Search of Binary Asteroids
©
2013, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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