Asteroids with Satellites Database--Johnston's Archive
(2070)
Humason
compiled by Wm. Robert Johnston
last updated
30 April 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: |
2.2500773375 AU
| |
orbital period P: |
3.3751740109 yr
(= 1232.8055905 d)
| |
eccentricity e: |
0.1546556
| |
perihelion distance q: |
1.902090277 AU
| |
aphelion distance Q: |
2.5980643984 AU
| |
inclination i: |
2.752352°
| |
argument of perihelion ω: |
350.332271°
| |
ascending node Ω: |
1.235392°
| |
mean anomaly M: |
77.218011°
| |
perihelion passage TP: |
2018 Aug 05.570013
| |
Epoch: |
2019 Apr 27
| |
data arc: |
1954-2018
(1749 obs.)
| |
Earth MOID: |
0.895557 AU
| |
Jupiter Tisserand invariant TJ: |
3.61
|
orbital data, secondary:
|
semimajor axis as: |
17
km
[*E]
| |
separation/primary radius as/rp: | 7.8 [*E] | |
separation/Hill radius as/rH: | 0.026 [*E] | |
orbital period Ps: |
2.229
± 0.004
d [B19b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.4
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
4.57
± 0.15
km [M11b]
| |
geometric albedo: |
0.405
± 0.087
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
650 km [*E]
|
other data, primary:
|
diameter dp: |
4.37
± 0.15
km [*D]
| |
rotation period RPp: |
3.1883
± 0.0005
h [B19b]
| |
amplitude in mag., rotational ΔM: |
0.15
[B19b]
| |
amplitude in mag., mutual events ΔM: | 0.125 ±0.025 [B19b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.35
± 0.1
km [*D]
| |
diameter ratio ds/dp: |
0.31
± 0.02
[B19b]
| |
component mag. difference ΔM: |
2.54
± 0.14
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(2070) Humason
--discovery and notes:
Primary discovered
1964 Oct 14
from
Goethe Link Observatory, Brooklyn, Indiana, USA
by
Indiana Asteroid Program.
Alternate designation(s):
1964 TQ,
1954 UJ1, 1964 XM, 1974 QP, 1974 RB2.
Linked to prediscovery observations from 1954 Oct 23.
Permanent number assigned -.
Named 1983 Dec 20 for Milton L. Humason (1891-1972) [MPC008403].
Companion discovered
2018 Oct 13
by V. Benishek, P. Pravec, F. Pilcher, V. Chiorny
using
lightcurve
observations from Sopot Observatory, Serbia; Organ Mesa Observatory, New Mexico, USA; Kharkiv Observatory, Chuguev, Ukraine.
Announced
2019 Jan 16 [B19b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2019, 2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
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