Astronomy:145523 Lulin

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145523 Lulin
Discovery[1]
Discovered byH.-C. Lin
Q.-Z. Ye
Discovery siteLulin Obs.
Discovery date7 March 2006
Designations
(145523) Lulin
Named afterLulin Mountains[1]
(observatory site)
2006 EM67
Minor planet categorymain-belt[1][2] · (middle)
background[3][4]
Orbital characteristics[2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 0
Observation arc25.72 yr (9,396 d)
|{{{apsis}}}|helion}}3.2484 AU
|{{{apsis}}}|helion}}2.2468 AU
2.7476 AU
Eccentricity0.1823
Orbital period4.55 yr (1,664 d)
Mean anomaly273.09°
Mean motion0° 12m 59.04s / day
Inclination10.867°
Longitude of ascending node345.22°
273.12°
Physical characteristics
Mean diameter3.913±0.301 km[5]
Geometric albedo0.073±0.021[5]
Absolute magnitude (H)15.5[1][2]


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]

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