(1338)
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 AUorbital period **P:**3.405491886 yr (= 1243.8559110 d)eccentricity **e:**0.112432410perihelion distance **q:**2.009012013 AUaphelion distance **Q:**2.517994237 AUinclination **i:**4.8186869°argument of perihelion **ω:**110.407717°ascending node **Ω:**325.644252°mean anomaly **M:**115.880178°perihelion passage **TP:2013 Apr 17.6159Epoch:2014 May 23data arc:1934-2014 (1365 obs.)Earth MOID:**1.02946 AUJupiter 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:? |
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-- (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:
- Gajdos, S., Kornos, L., Vilagi, J., Galad, A., Pravec, P., Stephens, R., Reddy, V., Dyvig, R., Higgins, D., Oey, J., & Pray, D. 2007, Central Bureau Electronic Telegrams (1338) Duponta
© 2007-2008, 2014 by Wm. Robert Johnston.
Last modified 21 September 2014.
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