(468861) 2013 LU28

Last updated

(468861) 2013 LU28
Discovery [1]
Discovered by Mount Lemmon Srvy.
Discovery site Mount Lemon Obs.
Discovery date8 June 2013
Designations
(468861) 2013 LU28
2013 LU28 ·2014 LJ9
2015 KB157
TNO [2]  · centaur [3] [4] [5]
damocloid  · distant [1]
Orbital characteristics [2]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 2
Observation arc 4.94 yr (1,805 d)
Aphelion 353.12 AU
Perihelion 8.7303 AU
180.92 AU
Eccentricity 0.9517
2433.62 yr
359.24°
0° 0m 1.44s / day
Inclination 125.35°
275.97°
153.09°
TJupiter −2.0650
Physical characteristics
Mean diameter
106  km (est.) [4]
114  km (est.) [6]
0.08 (est.) [6]
0.09 (est.) [4]
8.1 [1] [2] [6]

    (468861) 2013 LU28, provisional designation 2013 LU28 is a highly eccentric trans-Neptunian object, retrograde centaur and damocloid from the outer regions of the Solar System. It was discovered on 8 June 2013 by astronomers with the Mount Lemmon Survey at the Mount Lemmon Observatory in Arizona, United States. [1] The object is unlikely a dwarf planet as it measures approximately 110 kilometers (68 miles) in diameter. [4] [6] It was numbered in 2016 and has not been named since.

    Contents

    Orbit and classification

    2013 LU28 orbits the Sun at a distance of 8.7–353.1  AU once every 2434 years (888,879 days; semi-major axis of 180.92 AU). Its orbit has an exceptionally high eccentricity of 0.95 and an inclination of 125° with respect to the ecliptic. [2] The body's observation arc begins with its official discovery observation at Mount Lemmon in June 2013. [1]

    TNO, centaur and damocloid

    With a semi-major axis larger than that of Neptune, 2013 LU28 is generically classified as a trans-Neptunian object. [2] It is also considered an (extended) centaur, due to its eccentric orbit with a low perihelion of 8.7 AU and a higher-than-90°-inclination, which gives it a retrograde orbit. [3] [4] There are only about a hundred known retrograde minor planets out of nearly 800,000 observed bodies, and, together with 2008 YB3 and 2011 MM4 , it is among the largest such objects. [3] 2013 LU28 also meets the orbital definition for being a damocloid, a cometary-like object without a coma or tail and a Tisserand's parameter with respect to Jupiter of less than 2 besides a retrograde orbit.

    Numbering and naming

    This distant minor planet was numbered by the Minor Planet Center on 20 June 2016 ( M.P.C. 100585). [7] As of 2018, it has not been named. [1]

    Physical characteristics

    Diameter and albedo

    According to the Johnston's archive and astronomer Michael Brown, 2013 LU28 measures 106 and 114 kilometers in diameter, based on an absolute magnitude of 8.1 and an assumed albedo for the body's surface of 0.08 and 0.09, respectively. [4] [6] According to Brown, 2013 LU28 is "probably not" a dwarf planet. [6] As of 2018, no physical characteristics have been determined from photometric observations. The body's rotation period, pole and shape remain unknown. [2] [8]

    Observations

    On 12 April 2024, the ‘’James Webb Space Telescope’’ (JWST) observed 2013 LU28 for a duration of 2 hours, 57 minutes, and 32 seconds. The telescope’s Mid-Infrared Instrument (MIRI) in Medium Resolution Spectroscopy mode was used, tracking the asteroid using the Prime Targeted Moving mode. Published results are expected at a later date. [9]

    Related Research Articles

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    <span class="nowrap">2015 RX<sub>245</sub></span>

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    <span class="nowrap">2013 FS<sub>28</sub></span>

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    2011 MM4, provisional designation: 2011 MM4, is a sizable centaur and retrograde damocloid from the outer Solar System, approximately 64 kilometers (40 miles) in diameter. It was discovered on 24 June 2011, by astronomers with the Pan-STARRS 1 at the Haleakala Obs. in Hawaii.

    (523674) 2013 MA12 (provisional designation 2013 MA12) is a classical trans-Neptunian object and dwarf planet candidate from the Kuiper belt, located in the outermost region of the Solar System, approximately 340 kilometers (210 miles) in diameter. The cubewano belongs to the hot population. It was discovered on 26 July 2011, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.

    (523706) 2014 HF200 (provisional designation 2014 HF200) is a trans-Neptunian object on an eccentric orbit from the scattered disc, located in the outermost region of the Solar System. It was discovered on 20 May 2012, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States. The dwarf planet candidate measures approximately 300 kilometers (190 miles) in diameter.

    (523683) 2014 CP23 (provisional designation 2014 CP23) is a trans-Neptunian object from the scattered disc located in the outermost region of the Solar System It was discovered on 29 October 2011, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States. The dwarf planet candidate measures approximately 267 kilometers (170 miles) in diameter.

    (495603) 2015 AM281 (provisional designation 2015 AM281) is a resonant trans-Neptunian object in the outermost region of the Solar System, guesstimated at approximately 470 kilometers (290 miles) in diameter. It was discovered on 13 March 2010, by astronomers with the Pan-STARRS survey at Haleakala Observatory, Hawaii, United States.

    References

    1. 1 2 3 4 5 6 "468861 (2013 LU28)". Minor Planet Center. Retrieved 17 October 2018.
    2. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 468861 (2013 LU28)" (2018-05-18 last obs.). Jet Propulsion Laboratory . Retrieved 17 October 2018.
    3. 1 2 3 de la Fuente Marcos, C.; de la Fuente Marcos, R. (August 2014). "Large retrograde Centaurs: visitors from the Oort cloud?". Astrophysics and Space Science. 352 (2): 409–419(Ap&SSHomepage). arXiv: 1406.1450 . Bibcode:2014Ap&SS.352..409D. CiteSeerX   10.1.1.749.7255 . doi:10.1007/s10509-014-1993-9. S2CID   119255885.
    4. 1 2 3 4 5 6 Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 17 October 2018.
    5. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 17 October 2018.
    6. 1 2 3 4 5 6 Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology . Retrieved 17 October 2018.
    7. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 October 2018.
    8. ↑ "LCDB Data for (468861)". Asteroid Lightcurve Database (LCDB). Retrieved 17 October 2018.
    9. ↑ "JWST Schedule". James Webb Space Telescope. Retrieved 17 April 2024.
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