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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