Astronomy:(505448) 2013 SA100
| Discovery[1] | |
|---|---|
| Discovered by | OSSOS |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 5 August 2013 |
| Designations | |
| (505448) 2013 SA100 | |
| 2013 SA100 · o3l79[2] | |
| Minor planet category | 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) |
| |{{{apsis}}}|helion}} | 53.810 AU |
| |{{{apsis}}}|helion}} | 38.607 AU |
| 46.209 AU | |
| Eccentricity | 0.1645 |
| Orbital period | 314.12 yr (114,732 d) |
| Mean anomaly | 249.56° |
| Mean motion | 0° 0m 11.16s / day |
| Inclination | 8.4892° |
| Longitude of ascending node | 27.788° |
| 114.99° | |
| Physical characteristics | |
| Mean diameter | 255 km (est.)[5] 267 km (est.)[4] |
| Geometric albedo | 0.08 (assumed)[5] 0.09 (assumed)[4] |
| g–r = 0.61[2] r–z = 0.47[2] | |
| Absolute magnitude (H) | 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.
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]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "505448 (2013 SA100)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=505448. Retrieved 2 December 2018.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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. doi:10.3847/1538-3881/aa83b1. Bibcode: 2017AJ....154..101P.
- ↑ 3.0 3.1 3.2 3.3 3.4 "JPL Small-Body Database Browser: 505448 (2013 SA100)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2505448. Retrieved 2 December 2018.
- ↑ 4.0 4.1 4.2 4.3 4.4 Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 1 December 2018.
- ↑ 5.0 5.1 5.2 5.3 5.4 Brown, Michael E.. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 1 December 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 2 December 2018.
- ↑ "LCDB Data for (505448)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=505448%7C. Retrieved 2 December 2018.
External links
- 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
- (505448) 2013 SA100 at the JPL Small-Body Database
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