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:
- 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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