From Surf Wiki (app.surf) — the open knowledge base

1338 Duponta

Stony Florian asteroid and synchronous binary system

Field	Value
minorplanet	yes
name	1338 Duponta
background	#D6D6D6
image	1338Dup2-LB1-mag16.jpg
caption	Duponta seen at approx. 16 apmag in 2009
discovery_ref
discoverer	L. Boyer
discovery_site	Algiers Obs.
discovered	4 December 1934
mpc_name	(1338) Duponta
alt_names	1934 XA
pronounced
named_after	Marc Dupont
(discoverer's nephew)
mp_category	main-belt(inner)
Flora
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	82.42 yr (30,104 days)
aphelion	2.5179 AU
perihelion	2.0108 AU
semimajor	2.2644 AU
eccentricity	0.1120
period	3.41 yr (1,245 days)
mean_anomaly	102.88°
mean_motion	/ day
inclination	4.8170°
asc_node	325.63°
arg_peri	110.63°
satellites	1 (P: 17.57; D: 1.77 km)
dimensions	km
(derived)
km
7.88 km (taken)
km
rotation	h
h
h
albedo

spectral_type	S (assumed)
abs_magnitude	(R) (R)12.612.712.75

(discoverer's nephew) Flora (derived) km 7.88 km (taken) km h h

1338 Duponta, provisional designation , is a stony Florian asteroid and synchronous binary system from the inner regions of the asteroid belt, approximately 7.8 kilometers in diameter.

It was discovered on 4 December 1934, by French astronomer Louis Boyer at the Algiers Observatory in Algeria, North Africa. It was named after the discoverer's nephew, Marc Dupont. The asteroid's unnamed minor-planet moon was discovered in March 2007. It measures approximately 1.77 kilometers in diameter and has an orbital period of 17.57 hours.

Orbit and classification

Duponta is a member of the Flora family (402), a giant asteroid family and the largest family of stony asteroids in the main belt. It orbits the Sun in the inner main belt at a distance of 2.0–2.5 AU once every 3 years and 5 months (1,245 days). Its orbit has an eccentricity of 0.11 and an inclination of 5° with respect to the ecliptic. The body's observation arc begins with its official discovery observation at Algiers in 1934.

Physical characteristics

Duponta is an assumed stony S-type asteroid, which agrees with the Flora family's overall spectral type.

Rotation period

In March 2007, a rotational lightcurve of Duponta was obtained from photometric observations by a collaboration of Czech (Ondřejov Observatory), Slovak (Modra Observatory), Australian and American astronomers. Lightcurve analysis gave a well-defined rotation period of 3.85453 hours with a brightness variation of 0.23 magnitude (). Follow-up observations by Petr Pravec in 2007 and 2010, gave a concurring period of 3.85449 and 3.85453 hours with an amplitude of 0.26 and 0.23 magnitude, respectively ().

Moon

During the photometric observations in 2007, it was also revealed that Duponta is a synchronous binary asteroid with a minor-planet moon orbiting it every 17.57(8) hours. Based on mutual eclipse and occultation events with a magnitude between 0.06 and 0.12, the binary system has a mean-diameter ratio of , which translates into a diameter of 1.77 kilometers for the satellite. It has an estimated semi-major axis of 14 kilometers.

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Duponta measures 7.470 and 7.875 kilometers in diameter and its surface has an albedo of 0.2286 and 0.251, respectively.

The Collaborative Asteroid Lightcurve Link adopts Petr Pravec's revised WISE data, that is, an albedo of 0.2159 and a diameter of 7.885 kilometers based on an absolute magnitude of 12.798.

Naming

This minor planet was named by the discoverer after his nephew Marc Dupont. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 122).

Notes

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

flora-asteroids discoveries-by-louis-boyer-(astronomer) named-minor-planets binary-asteroids astronomical-objects-discovered-in-1934

Want to explore this topic further?

Ask Mako anything about 1338 Duponta — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report