Asteroids with Satellites Database--Johnston's Archive

(1338) Duponta

compiled by Wm. Robert Johnston
last updated 21 September 2014

--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: 2.263503125 AU
orbital period P: 3.405491886 yr
(= 1243.8559110 d)
eccentricity e: 0.112432410
perihelion distance q: 2.009012013 AU
aphelion distance Q: 2.517994237 AU
inclination i: 4.8186869°
argument of perihelion ω: 110.407717°
ascending node Ω: 325.644252°
mean anomaly M: 115.880178°
perihelion passage TP: 2013 Apr 17.6159
Epoch: 2014 May 23
data arc: 1934-2014 (1365 obs.)
Earth MOID: 1.02946 AU
Jupiter Tisserand invariant TJ: 3.605

orbital data, secondary:
binary dynamical type:A [M09a]
semimajor axis as: 14 km [*E]
separation/primary radius as/rp:3.6 [*E]
separation/Hill radius as/rH:0.012 [*E]
orbital period Ps: 0.7321 ± 0.0004 d [G07a]
eccentricity es: ?
normalized ang. mom. αL: 0.67 [M09a]

other data, system (combined):
absolute mag. H: 12.6 [MPC]
slope parameter G: 0.30 [P09d]
effective diameter dE: 7.88 ± 0.06 km [M11b]
geometric albedo: 0.229 ± 0.027 [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: 7.68 ± 0.06 km [*D]
rotation period RPp: 3.85453 ± 0.00009 h [G07a]
amplitude in mag., rotational ΔM: 0.23 [G07a]
amplitude in mag., mutual events ΔM:0.09 ±0.03 [G07a]
pole direction Β, λ: ? , ?

other data, secondary:
diameter ds: 1.77 ± 0.15 km [*D]
diameter ratio ds/dp: 0.23 ± 0.02 [G07a]
component mag. difference ΔM: 3.2 ± 0.2 [*D]
rotation period RPs: ?

-- (1338) Duponta --discovery and notes:

Primary discovered 1934 Dec 04 from Algiers, Algeria by L. Boyer. Alternate designation(s): 1934 XA . Permanent number assigned -.

Named - for Marc Dupont.

Companion discovered 2007 Mar 06 by S. Gajdos, L. Kornos, J. Vilagi, A. Galad, P. Pravec, R. Stephens, V. Reddy, R. Dyvig, D. Higgins, J. Oey, and D. Pray using lightcurve observations from Modra Observatory, Slovakia; Ondrejov Observatory, Czech Republic; Goat Mountain Astronomical Research Station, Yucca Valley, California, USA; University of North Dakota, Grand Forks; Badlands Observatory, Quinn, South Dakota, USA; Canberra, Australia; Leura, New South Wales, Australia; Carbuncle Hill Observatory, Greene, Rhode Island, USA. Announced 2007 Mar 27 [G07a].

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2008, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.