2013 BL76
The orbits of some of the most distant asteroids, 2013 BL76 at top left
|
|
| Discovery | |
|---|---|
| Discovered by | Mt. Lemmon Survey |
| Discovery date | January 20, 2013 |
| Designations | |
|
Trans-Neptunian object Centaur (DES) Damocloid |
|
| Orbital characteristics | |
| Epoch 2017-Feb-16 (JD 2457800.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 687 days (1.88 yr) |
| Aphelion | 2254 ± 8 AU ~ 1920 AU |
| Perihelion | 8.365 AU (1.2514 Tm) (q) |
| 1131 ± 4 AU (a) ~ 964 AU |
|
| Eccentricity | 0.99260 (e) |
| 44,382 ±251 yr ~ 29900 yr last perihelion: 2012-10-27 |
|
| 0.04076° (M) | |
| 0.0000232226°/day (n) | |
| Inclination | 98.618° (i) |
| 180.20° (Ω) | |
| 165.99° (ω) | |
| Earth MOID | 7.3894 AU (1.10544 Tm) |
| Jupiter MOID | 3.5120 AU (525.39 Gm) |
| Saturn MOID | 0.98692 AU (147.641 Gm) |
| Physical characteristics | |
| Dimensions | ~ 15–40 km 30–40 km (assumed albedo 0.05-0.1) |
| 22.1 | |
| 10.8 | |
2013 BL76 is a minor planet (centaur) from the scattered disk/Inner Oort cloud. Using an epoch of February 2017, it is the minor planet with the 5th largest heliocentric semi-major axis in the Solar system (larger ones include 2014 FE72, 2012 DR30, and 2005 VX3).2013 BL76 has a barycentric semi-major axis of ~964 AU, which is the third largest barycentric semi-major axis of any minor planet.
With an absolute magnitude (H) of 10.8 and an unknown albedo, the object has an estimated diameter of 15–40 km. Since it has not been seen out-gassing, it is not known if it is a comet or not. It might also be a damocloid, a type of minor planet that was originally a comet but lost most of its near-surface volatile materials after numerous orbits around the Sun. It also might be a dormant comet that simply has not been seen outgassing.
2013 BL76 came to perihelion 8.3AU from the Sun on October 27, 2012, when it reached an apparent magnitude of about 20. In 1927, when it was 100AU from the Sun, it had an apparent magnitude of about 30.8. For comparison dwarf planet 90377 Sedna had an apparent magnitude of 21.7 when it was 100AU from the Sun. It comes to opposition at the start of September.
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