| Discovery | |
|---|---|
| Discovered by | C. Kowal |
| Discovery site | Palomar Observatory |
| Discovery date | 27 December 1975 |
| Designations | |
| MPC designation | (2102) Tantalus |
| Pronunciation | /ˈtæntələs/ |
| Named after | Tantalus |
| Alternative designations | 1975 YA |
| Minor planet category | PHA |
| Orbital characteristics | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 38.63 yr (14111 days) |
| Aphelion | 1.675969247626000 AU (250.72143080353 Gm) |
| Perihelion | 0.9041343191800040 AU (135.25656897612 Gm) |
| Semi-major axis | 1.290051783403 AU (192.9889998898 Gm) |
| Eccentricity | .299148816495564 |
| Orbital period (sidereal) | 1.47 yr (535.19 d) |
| Mean anomaly | 85.78643003020903° |
| Mean motion | 0° 40 21.563 / day |
| Inclination | 64.00535930263230° |
| Longitude of ascending node | 94.36993941983230° |
| Argument of perihelion | 61.55509931046220° |
| Earth MOID | 0.0430913 AU (6.44637 Gm) |
| Physical characteristics | |
| Dimensions | 2-4 km |
| Synodic rotation period | 2.384 h (0.0993 d) |
| Spectral type | Q |
| Absolute magnitude (H) | 16.0 |
2102 Tantalus (1975 YA) is an Apollo asteroid discovered on December 27, 1975, by C. Kowal at Palomar Observatory. It is a Q-type asteroid.
2102 Tantalus is a potentially hazardous asteroid (PHA) because its minimum orbit intersection distance (MOID) is less than 0.05 AU and its diameter is greater than 150 meters. The Earth-MOID is 0.0439 AU (6,570,000 km; 4,080,000 mi). Its orbit is well-determined for the next several hundred years.
It will pass 0.04439 AU (6,641,000 km; 4,126,000 mi) from Earth on 2038-Dec-27, which is just slightly closer than the 1975-Dec-26 approach of 0.046 AU. The asteroid is about 2–4 km in diameter.
The shape of 2102 Tantalus is estimated to be roughly spherical in outline and fairly symmetrical; the surface is thought to be covered in a fine-grained regolith.
References
- ^ "JPL Small-Body Database Browser: 2102 Tantalus". Jet Propulsion Laboratory. Retrieved 16 April 2016.
- ^ "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 2 March 2001. Retrieved 10 May 2015.
- Rożek, Agata; Lowry, Stephen C.; Rozitis, Benjamin; Dover, Lord R.; Taylor, Patrick A.; Virkki, Anne; Green, Simon F.; Snodgrass, Colin; Fitzsimmons, Alan; Campbell-White, Justyn; Sajadian, Sedighe; Bozza, Valerio; Burgdorf, Martin J.; Dominik, Martin; Figuera Jaimes, R.; Hinse, Tobias C.; Hundertmark, Markus; Jørgensen, Uffe G.; Longa-Peña, Penélope; Rabus, Markus; Rahvar, Sohrab; Skottfelt, Jesper; Southworth, John (2022). "Physical properties of near-Earth asteroid (2102) Tantalus from multiwavelength observations". Monthly Notices of the Royal Astronomical Society. 515 (3): 4551–4564. arXiv:2206.14306. doi:10.1093/mnras/stac1835.
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