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4828 Misenus

Trojan asteroid

Field	Value
minorplanet	yes
name	4828 Misenus
background	#C2FFFF
discovery_ref
discoverer	C. Shoemaker
discovery_site	Palomar Obs.
discovered	11 September 1988
mpc_name	(4828) Misenus
alt_names	1988 RV
pronounced
adjective	Misenian
named_after	Misenus
(Greek mythology)
mp_category	Jupiter trojan
Trojanbackground
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	0
observation_arc	29.77 yr (10,873 d)
aphelion	5.3854 AU
perihelion	4.9450 AU
semimajor	5.1652 AU
eccentricity	0.0426
period	11.74 yr (4,288 d)
mean_anomaly	35.011°
mean_motion	/ day
inclination	14.902°
asc_node	352.99°
arg_peri	130.05°
jupiter_moid	0.3366 AU
tisserand	2.9310
mean_diameter

rotation
albedo

spectral_type	C (assumed)
B–V
V–R
V–I
abs_magnitude	10.00
10.3
10.4

(Greek mythology) Trojanbackground

B–V
V–R
V–I
10.3 10.4

4828 Misenus is a larger Jupiter trojan from the Trojan camp, approximately 46 km in diameter. It was discovered on 11 September 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California. The dark Jovian asteroid has a rotation period of 12.9 hours. It was named after Aeneas' trumpeter, Misenus, from Greek mythology.

Orbit and classification

Misenus is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Lagrangian point, 60° behind on its orbit . It is also a non-family asteroid of the Jovian background population.

It orbits the Sun at a distance of 4.9–5.4 AU once every 11 years and 9 months (4,288 days; semi-major axis of 5.17 AU). Its orbit has an eccentricity of 0.04 and an inclination of 15° with respect to the ecliptic. The body's observation arc begins with its first observation at Palomar in August 1988, just one month prior to its official discovery observation.

Physical characteristics

Misenus is an assumed, carbonaceous C-type asteroid. It has a V–I color index of 0.92, typical for most D-type asteroids.

Rotation period

In April 1995, a rotational lightcurve of Misenus was obtained from photometric observations over three nights by Italian astronomer Stefano Mottola using the Bochum 0.61-metre Telescope at ESO's La Silla Observatory in Chile. Lightcurve analysis gave a well-defined rotation period of hours with a brightness amplitude of 0.33 magnitude ().

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Misenus measures 43.22 and 45.95 kilometers in diameter and its surface has an albedo of 0.098 and 0.063, respectively. The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 46.30 kilometers based on an absolute magnitude of 10.4.

Naming

This minor planet was named by the discoverer from Greek mythology after the Trojan Misenus, who was Aeneas' herald and trumpeter. He was drowned by Triton for challenging the gods to a musical contest by blowing on a conch shell. The official naming citation was published by the Minor Planet Center on 25 August 1991 (M.P.C. 18647).

References

Noah Webster (1884) ''A Practical Dictionary of the English Language''

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.

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