Asteroids with Satellites Database--Johnston's Archive
(1803)
Zwicky
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: |
2.3498296882 AU
| |
orbital period P: |
3.602090166 yr
(= 1315.6882815 d)
| |
eccentricity e: |
0.24740712
| |
perihelion distance q: |
1.768465094 AU
| |
aphelion distance Q: |
2.9311942828 AU
| |
inclination i: |
21.5530535°
| |
argument of perihelion ω: |
253.959849°
| |
ascending node Ω: |
337.241963°
| |
mean anomaly M: |
284.9657494°
| |
perihelion passage TP: |
2021 Sep 17.226900
| |
Epoch: |
2020 Dec 17
| |
data arc: |
1931-2021
(2786 obs.)
| |
Earth MOID: |
0.881755 AU
| |
Jupiter Tisserand invariant TJ: |
3.426
|
orbital data, secondary:
|
semimajor axis as: |
24
km
[*E]
| |
separation/primary radius as/rp: | 5.0 [*E] | |
separation/Hill radius as/rH: | 0.018 [*E] | |
orbital period Ps: |
1.1858
± 0.0008
d [P21b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
12.23
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
9.93
± 0.08
km [M14c]
| |
geometric albedo: |
0.259
± 0.038
[M14c]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1300 km [*E]
|
other data, primary:
|
diameter dp: |
9.61
± 0.08
km [*D]
| |
rotation period RPp: |
2.7329
± 0.0002
h [P21b]
| |
amplitude in mag., rotational ΔM: |
0.14
[P21b]
| |
amplitude in mag., mutual events ΔM: | 0.105 ±0.035 [P21b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
2.50
± 0.19
km [*D]
| |
diameter ratio ds/dp: |
0.26
± 0.02
[P21b]
| |
component mag. difference ΔM: |
2.93
± 0.17
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(1803) Zwicky
--discovery and notes:
Primary discovered
1967 Feb 06
from
Zimmerwald, Switzerland
by
P. Wild.
Alternate designation(s):
1967 CA,
1931 DL.
Linked to prediscovery observations from 1931 Feb 17.
Permanent number assigned -.
Named 1977 Apr 18 for Fritz Zwicky (1898-1974) [MPC004156].
Companion discovered
2021 Feb 21
using
lightcurve
observations from Command Module Observatory, Tempe, Arizona, USA; Center for Solar System Studies, California, USA.
Announced
2021 Mar 08 [P21b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2021, 2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
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