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1378 Leonce

Dark Nysian asteroid from the inner regions of the asteroid belt

Field	Value
minorplanet	yes
name	1378 Leonce
background	#D6D6D6
image	File:1378Leonce (Lightcurve Inversion).png
caption	Lightcurve-based 3D-model of Leonce
discovery_ref
discoverer	F. Rigaux
discovery_site	Uccle Obs.
discovered	21 February 1936
mpc_name	(1378) Leonce
alt_names	1936 DB1958 FG
1958 GY1962 KB
A915 RCA915 WA
named_after	Leonce Rigaux
(discoverer's father)
mp_category	main-belt(inner)
Nysa
orbit_ref
epoch	4 September 2017 (JD 2458000.5)
uncertainty	0
observation_arc	101.54 yr (37,088 days)
aphelion	2.7300 AU
perihelion	2.0187 AU
semimajor	2.3743 AU
eccentricity	0.1498
period	3.66 yr (1,336 days)
mean_anomaly	38.698°
mean_motion	/ day
inclination	3.5913°
asc_node	43.568°
arg_peri	202.15°
dimensions	km
18.16 km (derived)
km
km
km
km
km
rotation	h
h
h
h
albedo
0.0706 (derived)

spectral_type	C (assumed)
abs_magnitude	12.1012.20

1958 GY1962 KB A915 RCA915 WA (discoverer's father) Nysa 18.16 km (derived) km km km km km h h h

0.0706 (derived)

1378 Leonce, provisional designation , is a dark Nysian asteroid from the inner regions of the asteroid belt, approximately 19 kilometers in diameter. It was discovered on 21 February 1936, by Belgian astronomer Fernand Rigaux at the Royal Observatory of Belgium in Uccle, who named it after his father, Leonce Rigaux.

Orbit and classification

Leonce is a member of the Nysa family (405), also known as the Nysa-Polana complex, the largest grouping of almost 20 thousand known asteroids in the main belt, consisting of several sub-asteroid families.

It orbits the Sun in the inner asteroid belt at a distance of 2.0–2.7 AU once every 3 years and 8 months (1,336 days). Its orbit has an eccentricity of 0.15 and an inclination of 4° with respect to the ecliptic.

The asteroid was first identified as at Heidelberg Observatory in September 1915. One week later, the body's observation arc begins at Bergedorf Observatory, more than 20 years prior to its official discovery observation at Uccle.

Physical characteristics

Leonce is an assumed carbonaceous C-type asteroid.

Rotation period and poles

In 2002, 2007 and 2017, three rotational light curves of Leonce were obtained from photometric observations by amateur astronomers René Roy, Laurent Bernasconi and Daniel Klinglesmith and colleagues at Etscorn Observatory (719), respectively. Analysis gave a well-defined light curve with a consolidated rotation period of 4.3250 hours and a brightness amplitude between 0.49 and 0.63 magnitude ().

In addition a modeled light curve, using photometric data from various sources, gave a period of 4.32527 hours, as well as two spin axes of (210.0°, −67.0°) and (46.0°, −77.0°) in ecliptic coordinates.

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Leonce measures between 14.94 and 22.456 kilometers in diameter and its surface has an albedo between 0.0348 and 0.10.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0706 and a diameter of 18.16 kilometers based on an absolute magnitude of 12.2.

Naming

This minor planet was named after Leonce Rigaux, father of the discoverer astronomer Fernand Rigaux. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 125).

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.

nysa-asteroids discoveries-by-fernand-rigaux named-minor-planets astronomical-objects-discovered-in-1936

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