Asteroids with Satellites Database--Johnston's Archive
(16694)
1995 AJ
compiled by Wm. Robert Johnston
last updated
3 May 2022
--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: |
2.2377735795 AU
| |
orbital period P: |
3.3475279591 yr
(= 1222.7076794 d)
| |
eccentricity e: |
0.207285085
| |
perihelion distance q: |
1.773916492 AU
| |
aphelion distance Q: |
2.7016306668 AU
| |
inclination i: |
6.4189477°
| |
argument of perihelion ω: |
39.47648°
| |
ascending node Ω: |
286.018532°
| |
mean anomaly M: |
347.4134977°
| |
perihelion passage TP: |
2020 Jul 12.748925
| |
Epoch: |
2020 May 31
| |
data arc: |
1989-2020
(2381 obs.)
| |
Earth MOID: |
0.767088 AU
| |
Jupiter Tisserand invariant TJ: |
3.6
|
orbital data, secondary:
|
semimajor axis as: |
9
km
[*E]
| |
separation/primary radius as/rp: | 4.5 [*E] | |
separation/Hill radius as/rH: | 0.016 [*E] | |
orbital period Ps: |
1.0533
± 0.0008
d [B20c]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
4.06
± 0.03
km [M14c]
| |
geometric albedo: |
0.386
± 0.048
[M14c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
550 km [*E]
|
other data, primary:
|
diameter dp: |
3.96
km [*D]
| |
rotation period RPp: |
3.6421
± 0.0003
h [B20c]
| |
amplitude in mag., rotational ΔM: |
0.1
[B20c]
| |
amplitude in mag., mutual events ΔM: | 0.06 [B20c] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.91
km [*D]
| |
diameter ratio ds/dp: |
>0.23
[B20c]
| |
component mag. difference ΔM: |
<3.2
[B20c]
| |
rotation period RPs: |
?
| |
|
|
--
(16694) 1995 AJ
--discovery and notes:
Primary discovered
1995 Jan 02
from
Oizumi, Japan
by
T. Kobayashi.
Alternate designation(s):
1990 TH15.
Linked to prediscovery observations from 1989 Mar 09.
Permanent number assigned 2000 Sep 13.
Companion discovered
2020 Dec
by V. Benishek, et al.
using
lightcurve
observations.
Announced
2020 Dec 23 [B20c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2021, 2022
by Wm. Robert Johnston.
Last modified
3 May 2022.
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