(4666)

Dietz (original) (raw)

Asteroids with Satellites Database--Johnston's Archive

(4666) Dietz and two satellites

compiled by Wm. Robert Johnston
last updated 23 September 2018

--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:**2.340452831 AUorbital period **P:**3.580550796 yr (= 1307.8208782 d)eccentricity **e:**0.233706436perihelion distance **q:**1.79347394 AUaphelion distance **Q:**2.887431721 AUinclination **i:**24.498693°argument of perihelion **ω:**41.963332°ascending node **Ω:**230.225283°mean anomaly **M:**312.20495°perihelion passage **TP:2018 Sep 12.631569Epoch:2018 Mar 23data arc:1986-2018 (1181 obs.)Earth MOID:**0.827624 AUJupiter Tisserand invariant **TJ:**3.41 orbital data, secondary: semimajor axis **as:**18 km [*E]separation/primary radius **as/rp:**5.5 [*D]separation/Hill radius **as/rH:**0.020 [*D]orbital period **Ps:**1.383 ± 0.004 d [O18a]eccentricity es:?normalized ang. mom. αL:? other data, system (combined): absolute mag. **H:**12.8 [MPC]slope parameter G: (0.24) [*A]effective diameter dE:6.83 ± 0.29 km [M11b]geometric albedo:0.239 ± 0.066 [M11b]color index U-B:?color index B-V:?taxonomic type:?mass m:?density ρ: (1.6 g/cm3) [*A]Hill radius **rH:**920 km [*E] other data, primary: diameter **dp:**6.52 km [*D]rotation period **RPp:**2.95242 ± 0.00002 h [P15h]amplitude in mag., rotational **ΔM:**0.28 [O18a]amplitude in mag., mutual events **ΔM:**0.12 [O18a]pole direction Β, λ:? , ? other data, secondary: diameter **ds:**>2.22 km [*D]diameter ratio **ds/dp:**>0.34 [O18a]component mag. difference ΔM:<2.3 [*D]rotation period RPs:?

-- (4666) Dietz --discovery and notes:

Primary discovered 1986 May 04 from Palomar Observatory, California, USA by C. S. Shoemaker. Alternate designation(s): 1986 JA1. Permanent number assigned 1990 Dec 02.

Named 1991 Jun 27 for Robert S. Dietz [MPC018461].

Second component discovered 2015 Sep 02 by J. Oey, P. Pravec, K. Hornoch, D. Pray, V. Benishek, R. Montaigut, A. Leroy, and J. Vilagi using lightcurve observations from Ondrejov Observatory, Czech Republic; Blue Mountains Observatory, Leura, New South Wales, Australia; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Belgrade Astronomical Observatory, Serbia; OPERA Observatory, France; Perth Observatory; Modra Observatory; JBL Observatory, Bathurst, New South Wales, Australia. Announced 2015 Oct.

Third component discovered 2015 Sep 02 by J. Oey, P. Pravec, K. Hornoch, D. Pray, V. Benishek, R. Montaigut, A. Leroy, and J. Vilagi using lightcurve observations from Ondrejov Observatory, Czech Republic; Blue Mountains Observatory, Leura, New South Wales, Australia; Sugarloaf Mountain Observatory, South Deerfield, Massachusetts, USA; Belgrade Astronomical Observatory, Serbia; OPERA Observatory, France; Perth Observatory; Modra Observatory; JBL Observatory, Bathurst, New South Wales, Australia. Announced 2018 Jul 20 [O18a].

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© 2015, 2018 by Wm. Robert Johnston.
Last modified 23 September 2018.
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