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Asteroids with Satellites Database--Johnston's Archive

(4666) Dietzand two satellites

compiled by Wm. Robert Johnston
last updated23 September 2018

--Orbital and physical data--

(Seethis page for definitions of quantities; source codes in brackets, seethis 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 axisa:2.340452831 AU
orbital periodP:3.580550796 yr
(= 1307.8208782 d)
eccentricitye:0.233706436
perihelion distanceq:1.79347394 AU
aphelion distanceQ:2.887431721 AU
inclinationi:24.498693°
argument of perihelionω:41.963332°
ascending nodeΩ:230.225283°
mean anomalyM:312.20495°
perihelion passageTP:2018 Sep 12.631569
Epoch:2018 Mar 23
data arc:1986-2018(1181 obs.)
Earth MOID:0.827624 AU
Jupiter Tisserand invariantTJ:3.41

orbital data, secondary:

semimajor axisas:18 km[*E]
separation/primary radiusas/rp:5.5 [*D]
separation/Hill radiusas/rH:0.020 [*D]
orbital periodPs:1.383± 0.004d [O18a]
eccentricityes:?
normalized ang. mom.αL:?
other data, system (combined):
absolute mag.H:12.8[MPC]
slope parameterG:(0.24) [*A]
effective diameterdE:6.83± 0.29 km [M11b]
geometric albedo:0.239± 0.066[M11b]
color indexU-B:?
color indexB-V:?
taxonomic type:?
massm:?
densityρ:(1.6 g/cm3) [*A]
Hill radiusrH:920 km [*E]

other data, primary:

diameterdp:6.52 km [*D]
rotation periodRPp:2.95242± 0.00002h [P15h]
amplitude in mag., rotationalΔM:0.28 [O18a]
amplitude in mag., mutual eventsΔM:0.12 [O18a]
pole directionΒ, λ:?,?

other data, secondary:

diameterds:>2.22km [*D]
diameter ratiods/dp:>0.34 [O18a]
component mag. differenceΔM:<2.3 [*D]
rotation periodRPs:?

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

Primary discovered1986 May 04from Palomar Observatory, California, USAby 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 discovered2015 Sep 02 by J. Oey, P. Pravec, K. Hornoch, D. Pray, V. Benishek, R. Montaigut, A. Leroy, and J. Vilagiusinglightcurve 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.Announced2015 Oct.

Third component discovered2015 Sep 02 by J. Oey, P. Pravec, K. Hornoch, D. Pray, V. Benishek, R. Montaigut, A. Leroy, and J. Vilagiusinglightcurve 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.Announced2018 Jul 20 [O18a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

©2015, 2018by Wm. Robert Johnston.
Last modified23 September 2018.
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