Astronomy:2001 YB5
| Designations | |
|---|---|
| Minor planet category | |
| Orbital characteristics[1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 7 | |
| |{{{apsis}}}|helion}} | 4.36299 astronomical unit|AU (652.694 Gm) |
| |{{{apsis}}}|helion}} | 0.316468 AU (47.3429 Gm) |
| 2.339727 AU (350.0182 Gm) | |
| Eccentricity | 0.864742 |
| Orbital period | 3.58 yr (1307.2 d) |
| Mean anomaly | 313.434° |
| Mean motion | 0° 16m 31.422s / day |
| Inclination | 5.54537° |
| Longitude of ascending node | 108.444° |
| 115.206° | |
| Earth MOID | 0.00382892 AU (572,798 km) |
| Jupiter MOID | 0.698703 AU (104.5245 Gm) |
| Physical characteristics | |
| Rotation period | 2.5 h (0.10 d) |
| Absolute magnitude (H) | 20.9 |
2001 YB5 is a sub-kilometer asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group that passed at a nominal distance of 0.0043767 AU (654,750 km; 406,840 mi) from the Moon and 0.0055633 AU (832,260 km; 517,140 mi) from Earth on 7 January 2002.[1]
The asteroid measures approximately 300 meters in diameter; insignificant enough in size to be only discovered later that year on 26 December 2002 by NASA's Near-Earth Asteroid Tracking program (NEAT).[2][3][4] The nearest proximity it has reached Earth by was 830,000 kilometres which is approximately twice the distance to the Moon.[4] Based on limited observations, the asteroid may have a 2.5 hour rotation period and a Minimum Orbit Intersection Distance (MOID) from the Earth of 0.0038 AU (570,000 km; 350,000 mi).[1] The findings of David Morrison of the NASA Ames Research Center claim that although YB5-sized objects in space commonly fly and orbit the Earth's proximity at such close distances annually, there are no indications of a YB5 collision on Earth as their predicted impact spans from about once every 20,000 to 30,000 years.[4]
References
- ↑ 1.0 1.1 1.2 "JPL Small-Body Database Browser: (2001 YB5)". Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001%20YB5;cad=1.
- ↑ "Large Asteroid Passes Close to Earth". http://neat.jpl.nasa.gov/2001YB5.htm.
- ↑ Huge Asteroid Narrowly Misses Earth
- ↑ 4.0 4.1 4.2 "Repeated Blows: Rough Neighbourhoods". Luann Becker. http://www.nature.com/scientificamerican/journal/v286/n3/pdf/scientificamerican0302-76.pdf.
External links
- 2001 YB5 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemeris · Obs prediction · Orbital info · MOID · Proper elements · Obs info · Close · Physical info · NEOCC
- 2001 YB5 at ESA–space situational awareness
- 2001 YB5 at the JPL Small-Body Database
 |  |
