Back (137108) 1999 AN10 Arabic (137108) 1999 AN10 German (137108) 1999 AN10 Esperanto (137108) 1999 AN10 Spanish (137108) 1999 AN10 Finnish (137108) 1999 AN10 French (137108) 1999 AN10 Hungarian (137108) 1999 AN10 ID (137108) 1999 AN10 MIN (137108) 1999 AN10 Portuguese

(137108) 1999 AN10

(137108) 1999 AN10
Discovery
Discovered byLINEAR
Discovery date13 January 1999
Designations
(137108) 1999 AN10
Orbital characteristics[1]
Epoch 13 September 2023
(JD 2453300.5)
Uncertainty parameter 0
Observation arc66.97 yr
Earliest precovery date26 January 1955
Aphelion2.28 AU (341 million km)
Perihelion0.638 AU (95.4 million km)
1.46 AU (218 million km)
Eccentricity0.56224
1.76 yr (643.37 d)
313.20°
0° 33m 34.236s / day (n)
Inclination39.929°
314.35°
5 December 2023
268.33°
Earth MOID0.00015 AU (22,000 km)
Physical characteristics
Dimensions800–1800 m[2][3]
Mass~2.9×1012 kg[4]
Equatorial escape velocity
~2.8 km/h[4]
5.041 h[1]
18.1[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.[5]

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.[6][1][7][8] During the close approach, it is expected to peak at about apparent magnitude 7.3,[9] and will be visible in binoculars.

1999 AN10 has a well-determined orbit with an observation arc of 65 years.[1] It was found by Andreas Doppler and Arno Gnädig in precovery images from 1955.[1] 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.[10]

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.[1]

1999 AN10
Position uncertainty and increasing divergence[1]
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
2027 Moon/Earth approach[1]
Date & Time Approach
to 		Nominal distance
2027-Aug-07 06:48 Moon 763391 km
2027-Aug-07 07:11 Earth 389866 km
Animation of 1999 AN10's orbit – Close approach in 2027
   Sun ·    Earth ·    1999 AN10
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  2. ^ Cite error: The named reference phys was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference h was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference estimate was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Hannu was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Sormano was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference neodys was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference MPEC1999 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference NEODyS2027 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference JPL_Neop was invoked but never defined (see the help page).
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