145523 Lulin

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]

Not to be confused with Comet Lulin.
145523 Lulin
Discovery [1]
Discovered byH.-C. Lin
Q.-Z. Ye
Discovery siteLulin Obs.
Discovery date7 March 2006
Designations
(145523) Lulin
Named after
Lulin Mountains [1]
(observatory site)
2006 EM67
main-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)
Aphelion3.2484 AU
Perihelion2.2468 AU
2.7476 AU
Eccentricity0.1823
4.55 yr (1,664 d)
273.09°
0° 12m 59.04s / day
Inclination10.867°
345.22°
273.12°
Physical characteristics
Mean diameter
3.913±0.301 km[5]
0.073±0.021[5]
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
    1. "145523 Lulin (2006 EM67)". Minor Planet Center. Retrieved 4 December 2018.
    2. "JPL Small-Body Database Browser: 145523 Lulin (2006 EM67)" (2017-11-21 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2018.
    3. "Asteroid 145523 Lulin". Small Bodies Data Ferret. Retrieved 4 December 2018.
    4. "Asteroid (145523) Lulin". AstDyS-2, Asteroids – Dynamic Site. Retrieved 4 December 2018.
    5. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 4 December 2018.
    6. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 December 2018.
    7. "LCDB Data for (145523) Lulin". Asteroid Lightcurve Database (LCDB). Retrieved 4 December 2018.

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