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4063 Euforbo

Jupiter trojan asteroid

Field	Value
minorplanet	yes
name	4063 Euforbo
background	#C2FFFF
discovery_ref
discoverer	San Vittore Obs.
discovery_site	San Vittore Obs.
discovered	1 February 1989
mpc_name	(4063) Euforbo
alt_names	1943 EV
1951 XJ1970 LC

adjective	Euforbian
pronounced
named_after	Euphorbus (Euforbo)
(Greek mythology)
mp_category	Jupiter trojan
Greekbackground
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	0
observation_arc	75.21 yr (27,471 d)
aphelion	5.7958 AU
perihelion	4.5747 AU
semimajor	5.1852 AU
eccentricity	0.1177
period	11.81 yr (4,313 d)
mean_anomaly	224.59°
mean_motion	/ day
inclination	18.941°
asc_node	113.51°
arg_peri	318.44°
jupiter_moid	0.4441 AU
tisserand	2.8790
mean_diameter
(derived)

rotation

albedo	(derived)

spectral_type	C (assumed)
D (S3OS2-TH)
D (S3OS2-BB)
V–I
abs_magnitude
8.60
8.7

1951 XJ1970 LC

(Greek mythology) Greekbackground (derived)

D (S3OS2-TH) D (S3OS2-BB) V–I
8.60 8.7

4063 Euforbo is a large Jupiter trojan from the Greek camp, approximately 100 km in diameter. It was discovered on 1 February 1989, by Italian astronomers at the San Vittore Observatory near Bologna, Italy. The dark D-type asteroid is one of the 25 largest Jupiter trojans and has a rotation period of 8.8 hours. It was named after Euphorbus (Euforbo) from Greek mythology.

Orbit and classification

Euforbo is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Lagrangian point, 60° ahead of its orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.

It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 10 months (4,313 days; semi-major axis of 5.19 AU). Its orbit has an eccentricity of 0.12 and an inclination of 19° with respect to the ecliptic.

The body's observation arc begins with its first observation as ** at Turku Observatory in March 1943, nearly 46 years prior to its official discovery observation at Bologna.

Physical characteristics

In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Euforbo is a dark D-type asteroid. It is also an assumed, carbonaceous C-type asteroid.

Rotation period

Since 1992, several rotational lightcurve of Euforbo have been obtained from photometric observations by Stefano Mottola, Robert Stephens, René Roy and astronomers at the Palomar Transient Factory (). In November 2010, the best-rated lightcurve by James W. Brinsfield at the Via Capote Observatory , California, gave a rotation period of 8.846 hours with a brightness amplitude of 0.19 magnitude ().

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Euforbo measures between 95.62 and 106.38 kilometers in diameter and its surface has an albedo between 0.057 and 0.070.

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0558 and a diameter of 102.35 kilometers based on an absolute magnitude of 8.7.

Naming

This minor planet was named from Greek mythology after Euphorbus (Euforbo), the Greek hero who wounded Patroclus in the breast before being killed by Hektor. The official naming citation was published by the Minor Planet Center on 19 January 1992 (M.P.C. 19347).

Notes

References

'Euphorbus' in 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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