Astronomy:2017 TD6
| Discovery[1][2] | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Obs. |
| Discovery date | 11 October 2017 (first observed only) |
| Designations | |
| 2017 TD6 | |
| Minor planet category | NEO · Apollo[1] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 6 | |
| Observation arc | (8 days) |
| |{{{apsis}}}|helion}} | 1.5284 AU |
| |{{{apsis}}}|helion}} | 0.7798 AU |
| 1.1541 AU | |
| Eccentricity | 0.3243 |
| Orbital period | 1.24 yr (453 days) |
| Mean anomaly | 275.44° |
| Mean motion | 0° 47m 42s / day |
| Inclination | 1.7198° |
| Longitude of ascending node | 26.985° |
| 82.738° | |
| Earth MOID | 0.00034 AU · 0.13 LD |
| Physical characteristics | |
| Dimensions | 9.9–22 m[3] 11 m (generic at 0.20)[4] |
| Absolute magnitude (H) | 27.162[1] · 27.175 |
2017 TD6 is a micro-asteroid, classified as a near-Earth object of the Apollo group, approximately 10–20 meters in diameter. It was first observed by Pan-STARRS at Haleakala Observatory, Hawaii, on 11 October 2017.[2]
On 19 October 2017, the asteroid transited Earth at a nominal distance of 191,000 km; 119,000 mi (0.001278 astronomical unit|AU), which corresponds to 0.5 lunar distances (LD). On the following day it also passed near the Moon at 113,000 km (0.00075575 AU).[1] Peaking near a magnitude of 18, the object was too faint to be seen—except for the largest telescopes.[3]
As of 2018, 2017 TD6 has a poorly determined orbit with an uncertainty of 6 and a short observation arc of 8 days only. Due to its small size, the asteroid is likely to remain unobserved until its next, still relatively distant approach, predicted to occur in March 2044, at a distance of 2,030,000 km (0.01358 AU) or 5.3 LD from Earth.[1]
See also
- 2012 TC4 – A similar small asteroid that passed close to the earth on 12 October 2017
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: (2017 TD6)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3786445. Retrieved 25 January 2018.
- ↑ 2.0 2.1 "2017 TD6". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2017+TD6. Retrieved 25 January 2018.
- ↑ 3.0 3.1 Steve Spaleta (19 October 2017). "Newfound Bus-Size Asteroid Will Zoom Safely By Earth Today". Space.com. https://www.space.com/38502-bus-size-asteroid-2017-td6-earth-flyby.html. Retrieved 25 January 2018.
- ↑ "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 25 January 2018.
External links
- MPEC 2017-U33 : 2017 TD6, Minor Planet Electronic Circular (MPEC)
- Near-Earth asteroid 2017 TD6 very close encounter: an image (18 Oct. 2017)
- Asteroid 2017 TD6 to flyby Earth at 0.5 LD on October 19, 2017, The Watchers, 18 October 2017
- 2017 TD6 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2017 TD6 at ESA–space situational awareness
- 2017 TD6 at the JPL Small-Body Database
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