Summary
(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.
| 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 | |
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] | |
Orbit and classification edit
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 edit
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 edit
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]
References edit
- ^ a b c d e f g "505448 (2013 SA100)". Minor Planet Center. Retrieved 2 December 2018.
- ^ a b c d e f 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.
- ^ a b c d e "JPL Small-Body Database Browser: 505448 (2013 SA100)" (2017-08-30 last obs.). Jet Propulsion Laboratory. Retrieved 2 December 2018.
- ^ a b c d e Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 1 December 2018.
- ^ a b c d e Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 1 December 2018.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 2 December 2018.
- ^ "LCDB Data for (505448)". Asteroid Lightcurve Database (LCDB). Retrieved 2 December 2018.
External links edit
- MPEC 2017-L32 : 2013 SA100, Minor Planet Electronic Circular, 4 June 2017
- List of Transneptunian Objects, Minor Planet Center
- Discovery Circumstances: Numbered Minor Planets (505001)-(510000) – Minor Planet Center
- (505448) 2013 SA100 at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- (505448) 2013 SA100 at the JPL Small-Body Database