(585310) 2017 YZ1, provisional designation: 2017 YZ1, is a sub-kilometer asteroid on an eccentric orbit, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 250 meters (800 feet) in diameter. It was first observed on 20 December 2017, by astronomers with the Mount Lemmon Survey at Mount Lemmon Observatory near Tucson, Arizona, in the United States.[1][3] On 29 January 2018, it passed Earth at 125 lunar distances.[2]
| Discovery[1] | |
|---|---|
| Discovered by | Mount Lemmon Srvy. |
| Discovery site | Mount Lemon Obs. |
| Discovery date | 20 December 2017 |
| Designations | |
| (585310) 2017 YZ1 | |
| 2017 YZ1 | |
| NEO · PHA · Apollo[1][2] | |
| Orbital characteristics[2] | |
| Epoch 1 July 2021 (JD 2459396.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 8.78 (3,206 days) |
| Aphelion | 1.7715 AU |
| Perihelion | 0.8830 AU |
| 1.3272 AU | |
| Eccentricity | 0.3347 |
| 1.53 yr (558 d) | |
| 43.773° | |
| 0° 38m 40.551s / day | |
| Inclination | 20.875° |
| 277.75° | |
| 298.39° | |
| Earth MOID | 0.00012 AU (0.047 LD) |
| Physical characteristics | |
| 0.26 km[3] | |
| 20.43[2] | |
Orbit and classification
edit2017 YZ1 is a member of the Apollo asteroids, which cross the orbit of Earth. Apollo's are the largest group of near-Earth objects with nearly 10 thousand known objects.
It orbits the Sun at a distance of 0.88–1.77 AU once every 18 months (558 days; semi-major axis of 1.33 AU). Its orbit has an eccentricity of 0.33 and an inclination of 21° with respect to the ecliptic.[2]
Risk assessment
editThe 9 January 2018 solution with a 15-day observation arc was listed at Torino scale 1 with a 1:21,000 chance of impacting Earth on 30 June 2047. By 9 January 2018, the geocentric 30 June 2047 uncertainty region had shrunk to ±50 million km. With a longer 20 day observation arc, it dropped to Torino scale 0 and had a 1:670,000 chance of impacting Earth on 30 June 2047.[3] On 18 January 2018 it was removed from the Sentry Risk Table. With a 28-day observation arc, the nominal solution suggests it will be about 0.25 AU (37,000,000 km) from Earth on 30 June 2047. The 3-sigma uncertainty in the 2047 close approach distance is about ±13 million km.
Numbering and naming
editThis minor planet was numbered by the Minor Planet Center on 10 August 2021, receiving the number (585310) in the minor planet catalog (M.P.C. 133609).[4] As of 2021[update], it has not been named.[1]
See also
editReferences
edit- ^ a b c d "585310 (2017 YZ1)". Minor Planet Center. Retrieved 24 August 2021.
- ^ a b c d e "JPL Small-Body Database Browser: 585310 (2017 YZ1)" (2021-07-28 last obs.). Jet Propulsion Laboratory. Retrieved 24 August 2021.
- ^ a b c "Earth Impact Risk Summary: 2017 YZ1". NASA/JPL Near-Earth Object Program Office. Archived from the original on 11 January 2018. Retrieved 7 January 2018.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 21 August 2021.
External links
edit- MPEC 2017-Y79 : 2017 YZ1, Minor Planet Electronic Circular
- CNEOS – Center for Near Earth Object Studies, NASA
- List Of Apollo Minor Planets (by designation), Minor Planet Center
- List of the Potentially Hazardous Asteroids (PHAs), Minor Planet Center
- Case Study of 2017 YZ1: Long-term Impact Monitoring and IAWN Archived 21 March 2018 at the Wayback Machine, IWAN
- Asteroid 2017 YZ1 Archived 7 August 2019 at the Wayback Machine, at Asteroidsnear.com
- (585310) 2017 YZ1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- (585310) 2017 YZ1 at ESA–space situational awareness
- (585310) 2017 YZ1 at the JPL Small-Body Database