Asteroids with Satellites Database--Johnston's Archive
(29606)
1998 QN94
compiled by Wm. Robert Johnston
last updated
2 October 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: |
2.3269778474 AU
| |
orbital period P: |
3.549740255 yr
(= 1296.542628 d)
| |
eccentricity e: |
0.208891916
| |
perihelion distance q: |
1.840890986 AU
| |
aphelion distance Q: |
2.8130647091 AU
| |
inclination i: |
23.9009249°
| |
argument of perihelion ω: |
50.105595°
| |
ascending node Ω: |
155.0038944°
| |
mean anomaly M: |
26.3214617°
| |
perihelion passage TP: |
2022 May 06.203064
| |
Epoch: |
2022 Aug 09
| |
data arc: |
1987-2022
(1869 obs.)
| |
Earth MOID: |
0.9074 AU
| |
Jupiter Tisserand invariant TJ: |
3.432
|
orbital data, secondary:
|
semimajor axis as: |
6.1
km
[*E]
| |
separation/primary radius as/rp: | 4.5 [*E] | |
separation/Hill radius as/rH: | 0.012 [*E] | |
orbital period Ps: |
0.8194
± 0.0002
d [S22a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14.7
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
2.8
± 0.6
km [M**]
| |
geometric albedo: |
0.358
± 0.205
[M**]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
490 km [*E]
|
other data, primary:
|
diameter dp: |
2.69
km [*D]
| |
rotation period RPp: |
2.8965
± 0.0001
h [S22a]
| |
amplitude in mag., rotational ΔM: |
0.17
± 0.01
[S22a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>0.78
km [*D]
| |
diameter ratio ds/dp: |
>0.29
[S22a]
| |
component mag. difference ΔM: |
2.7
[*D]
| |
rotation period RPs: |
19.666
± 0.004
h [S22a]
| |
|
|
--
(29606) 1998 QN94
--discovery and notes:
Primary discovered
1998 Aug 17
from
Socorro, New Mexico, USA
by
LINEAR Program.
Alternate designation(s):
2001 MK2.
Linked to prediscovery observations from 1987 Jun 30.
Permanent number assigned 2001 Oct 02.
Companion discovered
2022 May 02
by R. D. Stephens, D. R. Coley, B. D. Warner
using
lightcurve
observations from Center for Solar System Studies, Landers, California, USA.
Announced
2022 Sep 22 [S22a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2022
by Wm. Robert Johnston.
Last modified
2 October 2022.
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