2010 LH15

Last updated

(2010 LH15)
Discovery
Discovered by WISE
Catalina Sky Survey
Discovery date3–9 June 2010
28 October 2010
Designations
2010 TJ175
Active asteroid
Outer main-belt
Orbital characteristics [1] [2]
Epoch 21 November 2025 (JD 2461000.5)
Uncertainty parameter 0
Observation arc 21.58 years
Earliest precovery date16 October 2001
Aphelion 3.719 AU
Perihelion 1.765 AU
2.742 AU
Eccentricity 0.35636
4.539 years
131.10°
Inclination 10.897°
53.625°
290.46°
Earth  MOID 0.792 AU
Jupiter  MOID 1.842 AU
Physical characteristics [1]
0.5±0.1 km [3]
2 hours [3]
0.243
(g–r) = 0.44±0.07 [4]
17.36

    2010 LH15 is an unnamed active asteroid located in the outer main asteroid belt. It was first discovered by the Wide-field Infrared Survey Explorer satellite between 3 and 9 June 2010, and later on October 2010 by the Catalina Sky Survey, the latter of which mistakenly identified it as a separate object named 2010 TJ175. [5] In 2023, Colin O. Chandler later reported that cometary activity was detected from DECam imagery taken in September 2019, [6] likely caused by sublimation of material from its surface. [4]

    References

    1. 1 2 "(2010 LH15) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory . Retrieved 13 November 2025.
    2. ↑ "(2010 LH15) Orbit". Minor Planet Center . Retrieved 17 November 2025.
    3. 1 2 M. Mastropietro; H. Krishna; Y. Kim; J. Agarwal (2024). "Photometric Analysis of the Nucleus of the Main-belt Comet 2010 LH15". Research Notes of the American Astronomical Society. 8 (4): 104. Bibcode:2024RNAAS...8..104M. doi: 10.3847/2515-5172/ad3e85 .
    4. 1 2 B. Liu; C. Li; Z. Mu; X. Liu (2025). "Physical properties of newly active asteroid 2010 LH15" (PDF). Astronomy & Astrophysics. 693: 168–177. arXiv: 2507.12747 . Bibcode:2025A&A...693A.168L. doi: 10.1051/0004-6361/202449986 . ISSN   0004-6361.
    5. ↑ J. Shanklin (31 October 2025). "BAA Comet Section: Not yet designated objects (A/WISE = 2010 LH15 = 2010 TJ175)". British Astronomical Association. Retrieved 13 November 2025.
    6. ↑ C. O. Chandler; W. J. Oldroyd; H. H. Hsieh; et al. (2023). "New Recurrently Active Main-belt Comet 2010 LH15". Research Notes of the American Astronomical Society. 7 (3): 60. arXiv: 2303.12102 . Bibcode:2023RNAAS...7...60C. doi: 10.3847/2515-5172/acc57e .
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