astro.wikisort.org - Asteroid

145523 Lulin, provisional designation 2006 EM₆₇, is a background asteroid from the central region of the asteroid belt, approximately 3.9 kilometers (2.4 miles) in diameter. It was discovered on 7 March 2006, by Taiwanese astronomers Hung-Chin Lin (林宏欽) and Ye Quanzhi (葉泉志) at Lulin Observatory in central Taiwan.[1] It was named for the Lulin mountain and the observatory site.[1]

145523 Lulin

Discovery[1]
Discovered by	H.-C. Lin Q.-Z. Ye
Discovery site	Lulin Obs.
Discovery date	7 March 2006
Designations
MPC designation	(145523) Lulin
Named after	Lulin Mountains[1] (observatory site)
Alternative designations	2006 EM67
Minor planet category	main-belt[1][2] · (middle) background[3][4]
Orbital characteristics[2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc	25.72 yr (9,396 d)
Aphelion	3.2484 AU
Perihelion	2.2468 AU
Semi-major axis	2.7476 AU
Eccentricity	0.1823
Orbital period (sidereal)	4.55 yr (1,664 d)
Mean anomaly	273.09°
Mean motion	0° 12m 59.04s / day
Inclination	10.867°
Longitude of ascending node	345.22°
Argument of perihelion	273.12°
Physical characteristics
Mean diameter	3.913±0.301 km[5]
Geometric albedo	0.073±0.021[5]
Absolute magnitude (H)	15.5[1][2]

Orbit and classification

Lulin is a non-family asteroid from the main belt's background population.[3][4] It orbits the Sun in the central asteroid belt at a distance of 2.2–3.2 AU once every 4 years and 7 months (1,664 days; semi-major axis of 2.75 AU). Its orbit has an eccentricity of 0.18 and an inclination of 11° with respect to the ecliptic.[2] The earliest precovery was taken at ESO's La Silla Observatory in March 1992, extending the asteroid's observation arc by 14 years prior to its discovery observation.[1]

Naming

This minor planet was named after the Lulin mountain in central Taiwan, location of the discovering Lulin Observatory at an altitude of 2862 meters.[1] The official naming citation was published by the Minor Planet Center on 2 April 2007 (M.P.C. 59389).[6] At the observatory, Comet Lulin was discovered in 2007.

Physical characteristics

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the asteroid measures 3.9 kilometers in diameter and its surface has a low albedo of 0.073,[5] which is rather typical for a carbonaceous C-type body. As of 2018, no rotational lightcurve of Lulin has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2][7]

References

External links

• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (145001)-(150000) – Minor Planet Center
• 145523 Lulin at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 145523 Lulin at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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