Английская Википедия:2017 SX17
Шаблон:Mp is a very small asteroid, classified as a near-Earth object of the Apollo group, approximately Шаблон:Convert in diameter. It was first observed by astronomers of the Mount Lemmon Survey at Mount Lemmon Observatory on 29 September 2017, three days prior to its sub-lunar close encounter with Earth at 0.23 lunar distances on 2 October 2017.[1][2]
Orbit and classification
Шаблон:Mp is a member of the Apollo asteroids, which cross the orbit of Earth. Apollo's are the largest group of near-Earth objects with approximately 10 thousand known objects.
It orbits the Sun at a distance of 0.87–1.46 AU once every 15 months (459 days; semi-major axis of 1.16 AU). Its orbit has an eccentricity of 0.26 and an inclination of 3° with respect to the ecliptic.[2]
The body's observation arc begins with an observation made by Pan-STARRS on 24 September 2017, five days prior to its official first observation.[1]
Close approaches
The object last approached the Earth on 2 October 2017, at 10:20 UT, at a distance of Шаблон:Convert at a speed of Шаблон:Convert.[3] This distance corresponds to Шаблон:Convert.[2]
After the 2017-flyby, it still has an exceptionally low minimum orbital intersection distance with Earth of Шаблон:Convert, or 0.032 lunar distances (LD).[2]
Approaches in 2017
| Date/Time (UT) | Nominal Distance[2] (AU, LD and km) |
Body[2] |
|---|---|---|
| 1 October 2017 – 22:29 | Шаблон:Convert | Moon |
| 2 October 2017 – 10:20 | Шаблон:Convert | Earth |
Physical characteristics
Based on a generic magnitude-to-diameter conversion, Шаблон:Mp measures between Шаблон:Convert in diameter, for an absolute magnitude of 28.3, and an assumed albedo between 0.057 and 0.24, which represent typical values for carbonaceous and stony asteroids, respectively.[4]
As of 2018, no rotational lightcurve has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[2]
Numbering and naming
This minor planet has neither been numbered nor named by the Minor Planet Center.[1]
References
External links
- Bus-sized asteroid 2017 SX17 gives Earth a close shave, Skymania
- Asteroid 2017 SX17 to flyby Earth at 0.23 LD on October 2, The Watchers
- Bus-Size Asteroid Zooms by Earth in Close (But Harmless) Encounter, Space.com
- Asteroid 2017 SX17 close approach, International Asteroid Warning Network (IAWN)
- List Of Apollo Minor Planets (by designation), Minor Planet Center
- Шаблон:NeoDys
- Шаблон:JPL small body
Шаблон:2017 in space Шаблон:Small Solar System bodies Шаблон:Authority control
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