(1338) Duponta
compiled by Wm. Robert Johnston
last updated 28 November 2008
Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):
orbital data, primary (osculating elements) [JPL]:
|
semimajor axis a: |
2.2636663 AU
| |
orbital period P: |
3.41 y (=1,243.990 d)
| |
eccentricity e: |
0.1125097
| |
perihelion distance q: |
2.0089819 AU
| |
aphelion distance Q: |
2.5183507 AU
| |
inclination i: |
4.81473°
| |
argument of perihelion omega: |
109.95685°
| |
ascending node OMEGA: |
325.75116°
| |
mean anomaly M: |
84.07642°
| |
perihelion passage TP: |
2006-06-23.47
| |
Epoch: |
10 APR 2007
| |
data arc: |
1934-2006 (607 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(~23 km?)
| |
semimajor axis/primary radius a/Rp: |
(~3.7?)
| |
orbital period P: |
17.57 ± 0.01 h [C910]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
(~12 km?)
| |
absolute magnitude H: |
12.3 [JPL]
12.39±0.2 [OOf]
| |
rotation period: |
3.85453 ± 0.00009 h [C910]
| |
amplitude delta M: |
0.23; 0.06-0.12 [C910]
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
0.3±0.2 [OOf]
| |
geometric albedo: |
(0.12) assumed
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
(3 km?)
| |
diameter ratio Ds/Dp: |
0.23 ± 0.02 [C910]
| |
component magnitude difference: |
(3.2)
| |
rotation period: |
?
|
|
--(1338) Duponta--discovery and notes:
Primary discovered 4 December 1934 by L. Boyer at Algiers. Alternate designation 1934 XA.
Companion reported 27 March 2007 based on light curve observations from 6-26 March 2007 by S. Gajdos, L. Kornos, J. Vilagi, A. Galad, P. Pravec, R. Stephens, V. Reddy, R. Dyvig, D. Higgins, J. Oey, and D. Pray from Ondrejov Observatory, Modra Observatory, GMARS, Badlands Observatory, Hunters Hill Observatory, Leura Observatory, and Carbuncle Hill Observatory.
--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 by Wm. Robert Johnston.
Last modified 28 November 2008.
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