(532037) 2013 FY27
(532037) 2013 FY27 (provisional designation 2013 FY27) is a trans-Neptunian object and binary system that belongs to the scattered disc (like Eris). Its discovery was announced on 31 March 2014. It has an absolute magnitude (H) of 3.2. 2013 FY27 is a binary object, with two components approximately 740 kilometres (460 mi) and 190 kilometres (120 mi) in diameter. It is the ninth-intrinsically-brightest known trans-Neptunian object, and is approximately tied with 2002 AW197 and 2002 MS4 (to within measurement uncertainties) as the largest unnamed object in the Solar System.
2013 FY27 and its satellite, imaged by the Hubble Space Telescope on 15 January 2018 | |
| Discovery | |
|---|---|
| Discovered by | |
| Discovery date | 17 March 2013 (announced on 31 March 2014) |
| Designations | |
| 2013 FY27 | |
| Orbital characteristics | |
| Epoch 2023 Feb 25 (JD 2460000.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 3953 days (10.82 yr) |
| Earliest precovery date | 15 March 2011 (Pan-STARRS) |
| Aphelion | 81.912 AU (12.2539 Tm) |
| Perihelion | 35.199 AU (5.2657 Tm) |
| 58.555 AU (8.7597 Tm) | |
| Eccentricity | 0.3989 |
| 448.08 yr (163,660 d) | |
| 215.947° | |
| 0° 0m 7.92s /day | |
| Inclination | 33.290° |
| 186.922° | |
| ≈ 2202 June 15 ± 17 days | |
| 139.752° | |
| Known satellites | 1 |
| Physical characteristics | |
Mean diameter | 765+80 −85 km (effective diameter) 742+78 −83 km (primary) |
| 0.170+0.045 −0.030 | |
| Temperature | 22 K (perihelion) to 16 K (aphelion) |
| |
| 22.5 | |
| 3.15±0.03 | |
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