(505448) 2013 SA100

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(505448) 2013 SA100
Discovery [1]
Discovered by OSSOS
Discovery site Mauna Kea Obs.
Discovery date5 August 2013
Designations
(505448) 2013 SA100
2013 SA100 ·o3l79 [2]
TNO [3]  · cubewano [4]
p-DP [5]  · distant [1]
Orbital characteristics [3]
Epoch 27 April 2019 (JD 2458600.5)
Uncertainty parameter 4 ·3 [1]
Observation arc 4.07 yr (1,486 d)
Aphelion 53.810 AU
Perihelion 38.607 AU
46.209 AU
Eccentricity 0.1645
314.12 yr (114,732 d)
249.56°
0° 0m 11.16s / day
Inclination 8.4892°
27.788°
114.99°
Physical characteristics
Mean diameter
255  km (est.) [5]
267 km(est.) [4]
0.08(assumed) [5]
0.09(assumed) [4]
g–r = 0.61 [2]
r–z = 0.47 [2]
6.1 [1] [3]

    (505448) 2013 SA100, provisional designation 2013 SA100 and also known as o3l79, [2] is a trans-Neptunian object from the classical Kuiper belt in the outermost region of the Solar System. It was discovered on 5 August 2013, by astronomer with the Outer Solar System Origins Survey at the Mauna Kea Observatories, Hawaii, in the United States. [1] The classical Kuiper belt object belongs to the hot population and is a weak dwarf planet candidate, approximately 260 kilometers (160 miles) in diameter.

    Contents

    Orbit and classification

    It orbits the Sun at a distance of 38.6–53.8  AU once every 314 years and 1 month (114,732 days; semi-major axis of 46.21 AU). Its orbit has an eccentricity of 0.16 and an inclination of 8° with respect to the ecliptic. [3] The body's observation arc begins with its official discovery observation at Mauna Kea Observatories in August 2013. [1]

    As a cubewano, also known as classical Kuiper belt object, [4] 2013 SA100 is located in between the resonant plutino and twotino populations and has a low-eccentricity orbit. With an inclination above 8°, it belongs to the "stirred" hot population rather than to the cold population with lower inclinations. [2]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 4 November 2017 and received the number 505448 in the minor planet catalog ( M.P.C. 107067). [6] As of 2018, it has not been named. [1]

    Physical characteristics

    According to the American astronomer Michael Brown, 2013 SA100 measures 255 kilometers in diameter based on an assumed albedo of 0.08. [5] On his website, Brown lists this object as a "possible" dwarf planet (200–400 km), which is the category with the lowest certainty in his 5-class taxonomic system. [5] Similarly, Johnston's archive estimates a diameter 267 kilometers using an albedo of 0.09. [4]

    Spectroscopic measurements by the OSSOS team at the Gemini Observatory and with the Subaru Telescope gave a g–r and r–z color index of 0.61 and 0.47, respectively. [2] As of 2018, no rotational lightcurve has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown. [3] [7]

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    References

    1. 1 2 3 4 5 6 7 "505448 (2013 SA100)". Minor Planet Center. Retrieved 2 December 2018.
    2. 1 2 3 4 5 6 Pike, Rosemary E.; Fraser, Wesley C.; Schwamb, Megan E.; Kavelaars, J. J.; Marsset, Michael; Bannister, Michele T.; et al. (September 2017). "Col-OSSOS: z-Band Photometry Reveals Three Distinct TNO Surface Types". The Astronomical Journal. 154 (3): 8. arXiv: 1708.03079 . Bibcode:2017AJ....154..101P. doi: 10.3847/1538-3881/aa83b1 . S2CID   3522138.
    3. 1 2 3 4 5 "JPL Small-Body Database Browser: 505448 (2013 SA100)" (2017-08-30 last obs.). Jet Propulsion Laboratory . Retrieved 2 December 2018.
    4. 1 2 3 4 5 Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 1 December 2018.
    5. 1 2 3 4 5 Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology . Retrieved 1 December 2018.
    6. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 2 December 2018.
    7. ↑ "LCDB Data for (505448)". Asteroid Lightcurve Database (LCDB). Retrieved 2 December 2018.
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