(1480)
Asteroids with Satellites Database--Johnston's Archive
(1480) Aunus
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:**2.2021315394 AUorbital period **P:**3.2678708586 yr (= 1193.6123739 d)eccentricity **e:**0.108894031perihelion distance **q:**1.96233256 AUaphelion distance **Q:**2.441930519 AUinclination **i:**4.8617546°argument of perihelion **ω:**64.75341°ascending node **Ω:**63.674332°mean anomaly **M:**85.230807°perihelion passage **TP:2019 Aug 22.409596Epoch:2020 May 31data arc:1940-2020 (2372 obs.)Earth MOID:**0.983252 AUJupiter Tisserand invariant **TJ:**3.652 orbital data, secondary: semimajor axis **as:**12 km [*E]separation/primary radius **as/rp:**3.9 [*E]separation/Hill radius **as/rH:**0.013 [*E]orbital period **Ps:**0.8214 ± 0.0001 d [B20b]eccentricity es:?normalized ang. mom. αL:? | other data, system (combined): absolute mag. **H:**13.1 [MPC]slope parameter G: (0.15) [*A]effective diameter **dE:6.38 ± 0.07 km [M14c]geometric albedo:0.257 ± 0.027 [M14c]color index U-B:?color index B-V:?taxonomic type:**S (SMASSII) [JPL]mass m:?density ρ: (1.6 g/cm3) [*A]Hill radius **rH:**940 km [*E] other data, primary: diameter **dp:**6.11 km [*D]rotation period **RPp:**5.16 ± 0.0002 h [B20b]amplitude in mag., rotational **ΔM:**0.16 [B20b]amplitude in mag., mutual events **ΔM:**0.145 ±0.055 [B20b]pole direction Β, λ:? , ? other data, secondary: diameter **ds:**>1.83 km [*D]diameter ratio **ds/dp:**>0.3 [B20b]component mag. difference ΔM:<2.6 [*D]rotation period RPs:? |
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-- (1480) Aunus --discovery and notes:
Primary discovered 1938 Feb 18 from Turku by Y. Vaisala. Alternate designation(s): 1938 DK, 1992 WX9. Permanent number assigned 1940 Jan 12.
Named 1956 Jan for Aunus Vaisala [MPC001350].
Companion discovered 2020 Mar 21 by V. Benishek, P. Pravec, J. Oey, R. Durkee, C. Odden, W. Cooney, J. Kemp, D. Pray, J. Gross, D. Terrell, A. Aznar using lightcurve observations from Sopot Observatory, Serbia; Blue Mountains Observatory, Leura, New South Wales, Australia; Shed of Science South Observatory, Pontotoc, Texas, USA; Phillips Academy Observatory, Andover, Massachusetts, USA; Starry Night Observatory, Columbus, Texas, USA; Mittelman Observatories at New Mexico Skies, New Mexico, USA; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Sonoita Research Observatory, Sonoita, Arizona, USA; Isaac Azner Observatory, Alcublas, Valencia, Spain. Announced 2020 Jun 02 [B20b].
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© 2020, 2022 by Wm. Robert Johnston.
Last modified 30 April 2022.
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