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(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

See also

History of close approaches of large near-Earth objects since 1908 (A)
PHA Date Approach distance (lunar dist.) Abs.
mag
(H) 		Diameter (C)
(m) 		Ref (D)
Nomi-
nal(B) 		Mini-
mum 		Maxi-
mum
(33342) 1998 WT24 1908-12-16 3.542 3.537 3.547 17.9 556–1795 data
(458732) 2011 MD5 1918-09-17 0.911 0.909 0.913 17.9 556–1795 data
(7482) 1994 PC1 1933-01-17 2.927 2.927 2.928 16.8 749–1357 data
69230 Hermes 1937-10-30 1.926 1.926 1.927 17.5 668–2158 data
69230 Hermes 1942-04-26 1.651 1.651 1.651 17.5 668–2158 data
(137108) 1999 AN10 1946-08-07 2.432 2.429 2.435 17.9 556–1795 data
(33342) 1998 WT24 1956-12-16 3.523 3.523 3.523 17.9 556–1795 data
(163243) 2002 FB3 1961-04-12 4.903 4.900 4.906 16.4 1669–1695 data
(192642) 1999 RD32 1969-08-27 3.627 3.625 3.630 16.3 1161–3750 data
(143651) 2003 QO104 1981-05-18 2.761 2.760 2.761 16.0 1333–4306 data
2017 CH1 1992-06-05 4.691 3.391 6.037 17.9 556–1795 data
(170086) 2002 XR14 1995-06-24 4.259 4.259 4.260 18.0 531–1714 data
(33342) 1998 WT24 2001-12-16 4.859 4.859 4.859 17.9 556–1795 data
4179 Toutatis 2004-09-29 4.031 4.031 4.031 15.3 2440–2450 data
2014 JO25 2017-04-19 4.573 4.573 4.573 17.8 582–1879 data
(137108) 1999 AN10 2027-08-07 1.014 1.010 1.019 17.9 556–1795 data
(35396) 1997 XF11 2028-10-26 2.417 2.417 2.418 16.9 881–2845 data
(154276) 2002 SY50 2071-10-30 3.415 3.412 3.418 17.6 714–1406 data
(164121) 2003 YT1 2073-04-29 4.409 4.409 4.409 16.2 1167–2267 data
(385343) 2002 LV 2076-08-04 4.184 4.183 4.185 16.6 1011–3266 data
(52768) 1998 OR2 2079-04-16 4.611 4.611 4.612 15.8 1462–4721 data
(33342) 1998 WT24 2099-12-18 4.919 4.919 4.919 17.9 556–1795 data
(85182) 1991 AQ 2130-01-27 4.140 4.139 4.141 17.1 1100 data
314082 Dryope 2186-07-16 3.709 2.996 4.786 17.5 668–2158 data
(137126) 1999 CF9 2192-08-21 4.970 4.967 4.973 18.0 531–1714 data
(290772) 2005 VC 2198-05-05 1.951 1.791 2.134 17.6 638–2061 data
(A) List includes near-Earth approaches of less than 5 lunar distances (LD) of objects with H brighter than 18.
(B) Nominal geocentric distance from the Earth's center to the object's center (Earth radius≈0.017 LD).
(C) Diameter: estimated, theoretical mean-diameter based on H and albedo range between X and Y.
(D) Reference: data source from the JPL SBDB, with AU converted into LD (1 AU≈390 LD)
(E) Color codes:   unobserved at close approach   observed during close approach   upcoming approaches

References

  1. ^ a b c d e f g h i "JPL Small-Body Database Browser: 137108 (1999 AN10)". Retrieved 20 September 2023.
  2. ^ "137108 1999 AN10". The Near-Earth Asteroids Data Base at E.A.R.N. Archived from the original on 24 February 2012. Retrieved 31 January 2008.
  3. ^ "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 20 April 2018.
  4. ^ a b assume radius of 0.650 km; volume of a sphere * assume density of 2.6g/cm3 (though it could be a loose rubble pile) yields a mass of 2.99×1012 kg and an escape velocity of 2.82 km/h.
  5. ^ Hannu, Karttunen; Vilppu, Piirola (1999). Astrophysics with the NOT: Proceedings of the conference held in Turku on August 12–15, 1998. University of Turku. p. 270. ISBN 951-29-1615-0.
  6. ^ Piero Sicoli; Francesco Manca. "Sormano Astronomical Observatory: Table of Next Closest Approaches to the Earth by Asteroids". Astronomical Observatory of Brera. Archived from the original on 1 December 2007. Retrieved 31 January 2008.
  7. ^ "NEODys (137108) 1999AN10". Department of Mathematics, University of Pisa, ITALY. Archived from the original on 6 December 2014. Retrieved 31 January 2008.
  8. ^ "MPEC 1999-N21: 1999 AN10". IAU: Minor Planet Center. 12 July 1999. Retrieved 31 January 2008.
  9. ^ "1999AN10 Ephemerides for 7 Aug 2027". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 16 October 2011.
  10. ^ Paul W. Chodas (18 May 1999). "The Continuing Story Of Asteroid 1999 AN10". Archived from the original on 26 October 2010. Retrieved 22 October 2010.
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Prefix: a b c d e f g h i j k l m n o p q r s t u v w x y z 0 1 2 3 4 5 6 7 8 9

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