(137108) 1999 AN₁₀

(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]

(137108) 1999 AN₁₀

Discovery
Discovered by	LINEAR
Discovery date	13 January 1999
Designations
MPC designation	(137108) 1999 AN10
Minor planet category	NEO Apollo PHA
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc	21222 days (58.10 yr)
Aphelion	2.2787 AU (340.89 Gm)
Perihelion	0.63875 AU (95.556 Gm)
Semi-major axis	1.4587 AU (218.22 Gm)
Eccentricity	0.56212
Orbital period	1.76 yr (643.51 d)
Mean anomaly	186.69°
Mean motion	0° 33^m 33.948^s / day (n)
Inclination	39.932°
Longitude of ascending node	314.41°
Argument of perihelion	268.30°
Earth MOID	0.000708904 AU (106,050.5 km)
Physical characteristics
Dimensions	800–1800 m[2][3]
Mass	~2.9×10^12 kg[4]
Equatorial escape velocity	~2.8 km/h[4]
Absolute magnitude (H)	17.9[1]

On 7 August 2027, this asteroid will pass at about 0.0026 AU (390,000 km; 240,000 mi; 1.0 LD) of the Earth.[6][7][8][9] During the close approach, it should peak at about apparent magnitude 7.3,[10] and will be visible in binoculars.

1999 AN₁₀ has a well-determined orbit with an observation arc of 58 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.[11]

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.[7]

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	15.30	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≈6400 km). ^(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. "JPL Small-Body Database Browser: 137108 (1999 AN10)". Retrieved 7 April 2016.
2. "137108 1999 AN10". The Near-Earth Asteroids Data Base at E.A.R.N. Archived from the original on 29 September 2012. Retrieved 31 January 2008.
3. "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 20 April 2018.
4. 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. "JPL Close-Approach Data: 137108 (1999 AN10)" (2006-08-04 last obs (arc=51.5 years)). Retrieved 17 October 2011.
8. "NEODys (137108) 1999AN10". Department of Mathematics, University of Pisa, ITALY. Archived from the original on 18 April 2009. Retrieved 31 January 2008.
9. "MPEC 1999-N21: 1999 AN10". IAU: Minor Planet Center. 12 July 1999. Retrieved 31 January 2008.
10. "1999AN10 Ephemerides for 7 Aug 2027". NEODyS (Near Earth Objects – Dynamic Site). Retrieved 16 October 2011.
11. 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.

External links

• (137108) 1999 AN10 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• (137108) 1999 AN10 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters