2004 JG6 - Definition

**2004 JG₆**
Discovery
Discoverer	Brian A. Skiff / LONEOS
Discovery Date	May 11, 2004
Alternate Designations
Category	Aten, Apohele, Mercury-crosser, Venus-crosser
Orbital Elements Epoch October 22, 2004 (JD 2453300.5)
Eccentricity (e)	0.532
Semi-Major Axis (a)	94.985 G m (0.635 AU)
Perihelion (q)	44.480 Gm (0.297 AU)
Aphelion (Q)	145.491 Gm (0.973 AU)
Orbital Period (P)	184.798 d (0.51 a)
Mean Orbital Speed	34.58 km/s
Inclination (i)	18.962°
Longitude of the Ascending Node (Ω)	37.076°
Argument of Perihelion (ω)	352.935°
Mean Anomaly (M)	164.532°
Physical Characteristics
Dimensions	0.5-1.2 km
Mass	1.3-18.0×10¹¹ kg
Density	2.0? g/cm³
Surface Gravity	0.0001-0.0003 m/s²
Escape Velocity	0.0003-0.0006 km/s
Rotation Period	? d
Spectral Class	?
Absolute Magnitude	19.00
Albedo	0.10
Mean Surface Temperature	~481 K

2004 JG₆ (also written 2004 JG6) is an unusual asteroid.

It is the second known Apohele asteroid, which means its entire orbit lies within that of the Earth. Even more significantly, its orbital period is less than that of Venus or any other known asteroids, making it on average the second-closest known object to the Sun, second only to Mercury. 2004 JG6 has an eccentric orbit that crosses the orbits of both Mercury and Venus. It also has the smallest aphelion of any known asteroid.

It was discovered by Brian A. Skiff of the LONEOS project.

External link

http://www.lowell.edu/press_room/releases/recent_releases/2004JG6_rls.html

The Minor Planets

Vulcanoids | Main belt | Groups and Families | Near-Earth objects | Jupiter Trojans

(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)

(For a complete listing, see: List of asteroids)

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