Asteroids with Satellites Database--Johnston's Archive
(53110)
1999 AR7
compiled by Wm. Robert Johnston
last updated
18 March 2016
--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, Amor
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
1.644494591 AU
| |
orbital period P: |
yr
(= 770.2773027 d)
| |
eccentricity e: |
0.214430826
| |
perihelion distance q: |
1.291864257 AU
| |
aphelion distance Q: |
1.9971249248 AU
| |
inclination i: |
40.627067°
| |
argument of perihelion ω: |
58.22642°
| |
ascending node Ω: |
85.4560058°
| |
mean anomaly M: |
339.898887°
| |
perihelion passage TP: |
2016 Feb 25.009532
| |
Epoch: |
2016 Jan 13
| |
data arc: |
1998-2016
(648 obs.)
| |
Earth MOID: |
0.409728 AU
| |
Jupiter Tisserand invariant TJ: |
3.998
|
orbital data, secondary:
|
semimajor axis as: |
3.8
km
[*E]
| |
separation/primary radius as/rp: | 5.4 [*E] | |
separation/Hill radius as/rH: | 0.026 [*E] | |
orbital period Ps: |
1.305
± 0.0008
d [W16a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
16.7
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
1.5
km [*E]
| |
geometric albedo: |
(0.16
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
140 km [*E]
|
other data, primary:
|
diameter dp: |
1.4
km [*E]
| |
rotation period RPp: |
2.7375
± 0.0005
h [W16a]
| |
amplitude in mag., rotational ΔM: |
0.1
[W16a]
| |
amplitude in mag., mutual events ΔM: | 0.185 ±0.015 [W16a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.6
km [*E]
| |
diameter ratio ds/dp: |
>0.41
± 0.02
[W16a]
| |
component mag. difference ΔM: |
<1.9
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(53110) 1999 AR7
--discovery and notes:
Primary discovered
1999 Jan 11
from
Socorro, New Mexico, USA
by
LINEAR Program.
Linked to prediscovery observations from 1998 Nov 28.
Permanent number assigned 2003 Feb 16.
Companion discovered
2015 Dec 19
by B. D. Warner
using
lightcurve
observations from Palmer Divide Observatory, Colorado Springs, Colorado, USA.
Announced
2016 Mar [W16a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2016
by Wm. Robert Johnston.
Last modified
18 March 2016.
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