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| Discovery [1] | |
|---|---|
| Discovered by | OSSOS |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 5 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 | |
| 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.
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]
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]
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]
