(137108) 1999 AN10
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery date | 13 January 1999 |
| Designations | |
| (137108) 1999 AN10 | |
| Orbital characteristics | |
| Epoch 13 September 2023 (JD 2453300.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 66.97 yr |
| Earliest precovery date | 26 January 1955 |
| Aphelion | 2.28 AU (341 million km) |
| Perihelion | 0.638 AU (95.4 million km) |
| 1.46 AU (218 million km) | |
| Eccentricity | 0.56224 |
| 1.76 yr (643.37 d) | |
| 313.20° | |
| 0° 33m 34.236s / day (n) | |
| Inclination | 39.929° |
| 314.35° | |
| 5 December 2023 | |
| 268.33° | |
| Earth MOID | 0.00015 AU (22,000 km) |
| Physical characteristics | |
| Dimensions | 800–1800 m |
| Mass | ~2.9×1012 kg |
Equatorial escape velocity | ~2.8 km/h |
| 5.041 h | |
| 18.1 | |
(137108) 1999 AN10 is a kilometer-length near-Earth asteroid and potentially hazardous asteroid of the Apollo group. It was discovered by LINEAR on 13 January 1999.
On 7 August 2027, this asteroid will pass at about 0.00261 AU (390,000 km; 243,000 mi; 1.02 LD) of the Earth's center. During the close approach, it is expected to peak at about apparent magnitude 7.3, and will be visible in binoculars.
1999 AN10 has a well-determined orbit with an observation arc of 65 years. It was found by Andreas Doppler and Arno Gnädig in precovery images from 1955. When astronomers had an observation arc of the object of 123 days, computations gave a 1 in 10 million chance it would return on an impact trajectory in 2039.
On 7 August 1946, the asteroid passed 0.00625 AU (935,000 km; 581,000 mi) from Earth and then 0.00404 AU (604,000 km; 376,000 mi) from the Moon.
| Date | JPL SBDB nominal geocentric distance (AU) |
uncertainty region (3-sigma) |
|---|---|---|
| 1946-08-07 | 0.006250 AU (935.0 thousand km) | ±900 km |
| 2027-08-07 | 0.002606 AU (389.9 thousand km) | ±160 km |
| 2076-02-04 | 0.027021 AU (4.0423 million km) | ±154 thousand km |
| 2198-02-01 | 0.063727 AU (9.5334 million km) | ±800 thousand km |
| Date & Time | Approach to |
Nominal distance |
|---|---|---|
| 2027-Aug-07 06:48 | Moon | 763391 km |
| 2027-Aug-07 07:11 | Earth | 389866 km |