Asteroids with Satellites Database--Johnston's Archive
(22569)
1998 HK36
compiled by Wm. Robert Johnston
last updated
30 September 2023
--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: |
2.2865192062 AU
| |
orbital period P: |
3.457566031 yr
(= 1262.8759928 d)
| |
eccentricity e: |
0.2063145105
| |
perihelion distance q: |
1.8147771154 AU
| |
aphelion distance Q: |
2.7582612971 AU
| |
inclination i: |
4.027820526°
| |
argument of perihelion ω: |
287.9514623°
| |
ascending node Ω: |
49.9144281°
| |
mean anomaly M: |
7.2180968°
| |
perihelion passage TP: |
2023 Aug 18.6789966
| |
Epoch: |
2023 Sep 13
| |
data arc: |
1978-2023
(2585 obs.)
| |
Earth MOID: |
0.810167 AU
| |
Jupiter Tisserand invariant TJ: |
3.57
|
orbital data, secondary:
|
semimajor axis as: |
6.4
km
[*E]
| |
separation/primary radius as/rp: | 3.3 [*E] | |
separation/Hill radius as/rH: | 0.009 [*E] | |
orbital period Ps: |
0.6408
± 0.0004
d [B23o]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14.55
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
4.06
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: |
700 km [*E]
|
other data, primary:
|
diameter dp: |
3.91
km [*E]
| |
rotation period RPp: |
2.75221
± 0.00013
h [B23o]
| |
amplitude in mag., rotational ΔM: |
0.09
[B23o]
| |
amplitude in mag., mutual events ΔM: | 0.12 ±0.04 [B23o] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>1.09
km [*E]
| |
diameter ratio ds/dp: |
>0.28
[B23o]
| |
component mag. difference ΔM: |
<2.8
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(22569) 1998 HK36
--discovery and notes:
Primary discovered
1998 Apr 20
from
Socorro, New Mexico, USA
by
LINEAR Program.
Alternate designation(s):
1978 QD3, 1985 SC.
Linked to prediscovery observations from 1978 Aug 22.
Permanent number assigned 2001 Mar 09.
Companion discovered
2023 Aug 26
by V. Benishek, P. Pravec, and J. Oey
using
lightcurve
observations from Sopot Observatory, Serbia; Blue Mountains Observatory, Leura, New South Wales, Australia.
Announced
2023 Sep 28 [B23o].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
30 September 2023.
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