Asteroids with Satellites Database--Johnston's Archive
(1169)
Alwine
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: |
2.3179319052 AU
| |
orbital period P: |
3.528994732 yr
(= 1288.9896701 d)
| |
eccentricity e: |
0.155401767
| |
perihelion distance q: |
1.957721192 AU
| |
aphelion distance Q: |
2.6781426184 AU
| |
inclination i: |
4.0538256°
| |
argument of perihelion ω: |
177.200594°
| |
ascending node Ω: |
255.07228°
| |
mean anomaly M: |
75.215388°
| |
perihelion passage TP: |
2019 Sep 04.689282
| |
Epoch: |
2020 May 31
| |
data arc: |
1930-2020
(2804 obs.)
| |
Earth MOID: |
0.972448 AU
| |
Jupiter Tisserand invariant TJ: |
3.56
|
orbital data, secondary:
|
semimajor axis as: |
12
km
[*E]
| |
separation/primary radius as/rp: | 3.03 [*E] | |
separation/Hill radius as/rH: | 0.0099 [*E] | |
orbital period Ps: |
0.55867
± 0.00008
d [S20b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
12.8
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
8.10
± 0.18
km [M11b]
| |
geometric albedo: |
0.170
± 0.024
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1200 km [*E]
|
other data, primary:
|
diameter dp: |
7.91
± 0.18
km [*D]
| |
rotation period RPp: |
2.9274
± 0.0001
h [S20b]
| |
amplitude in mag., rotational ΔM: |
0.32
[S20b]
| |
amplitude in mag., mutual events ΔM: | 0.09 [S20b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
>1.7
km [*D]
| |
diameter ratio ds/dp: |
>0.22
[W21b]
| |
component mag. difference ΔM: |
<3.3
[*E]
| |
rotation period RPs: |
?
| |
|
|
--
(1169) Alwine
--discovery and notes:
Primary discovered
1930 Aug 30
from
Heidelberg, Germany
by
M. Wolf and M. Ferrero.
Alternate designation(s):
1930 QH,
1937 VH, 1955 SK1, 1955 SR1.
Permanent number assigned 1931 Dec 11.
Named 1939 Mar 27 for unknown namesake [AN06425].
Companion discovered
2020 Feb
by R. D. Stephens and B. D. Warner
using
lightcurve
observations from Center for Solar System Studies, Landers, California, USA; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Belgrade Astronomical Observatory, Belgrade, Serbia.
Announced
2020 Jun [S20b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2020-2021, 2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
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