2002 JE9

2002 JE9 (also written 2002 JE9) is an Apollo near-Earth asteroid and potentially hazardous object.[2] It has a well determined orbit with an observation arc of 10 years and an Uncertainty Parameter of 1.[2] It was removed from the Sentry Risk Table on 10 May 2002.[4] 2002 JE9 was discovered on 6 May 2002 by the Lincoln Near-Earth Asteroid Research (LINEAR) project using a 1.0-metre (39 in) Reflecting telescope; at the time of discovery, the asteroid possessed an apparent magnitude of 19.1.[1]

2002 JE9
Discovery[1]
Discovered byLINEAR (704)
1.0-m Reflector
Discovery date6 May 2002
Designations
2002 JE9
Apollo NEO,
PHA[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)[2]
Uncertainty parameter 0
Observation arc4014 days (10.99 yr)
Aphelion1.5126 AU (226.28 Gm) (Q)
Perihelion0.62292 AU (93.188 Gm) (q)
1.0678 AU (159.74 Gm) (a)
Eccentricity0.41662 (e)
1.10 yr (403.01 d)
221.24° (M)
0° 53m 35.772s /day (n)
Inclination8.8300° (i)
200.08° (Ω)
255.43° (ω)
Earth MOID0.00548821 AU (821,025 km)
Jupiter MOID3.70534 AU (554.311 Gm)
Physical characteristics
Dimensions~200 meters (660 ft)[3]
21.2[2]

    The asteroid has an estimated diameter of about 200 meters (660 ft)[3] based on an absolute magnitude of 21.3.[2] 2002 JE9 is considered significant due to having previously passed closer to the Earth; on 11 April 1971, it passed Earth at a distance of 0.0015 AU (220,000 km; 140,000 mi).[5][6] 2002 JE9 is one of the largest objects known to have passed inside the orbit of the moon. During the close approach in 1971 the asteroid reached about apparent magnitude 10,[7] about the same brightness as Saturn's moon Iapetus.[8]

    The asteroid will pass 0.0049 AU (730,000 km; 460,000 mi) from Venus on 25 November 2021.[5][6]

    References
    1. "MPEC 2002-J25 : 2002 JE9". IAU Minor Planet Center. 8 May 2002. Retrieved 8 November 2011. (K02J09E)
    2. "JPL Small-Body Database Browser: (2002 JE9)" (last observation: 2011-07-21; arc: 10.14 years). Jet Propulsion Laboratory. Retrieved 30 March 2016.
    3. "Near Earth Asteroids (NEAs)" (Version 20.1). International Astronomical Union. 13 October 2011. Retrieved 30 October 2011.
    4. "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 19 March 2012.
    5. "JPL Close-Approach Data: (2002 JE9)" (last observation: 2011-07-21; arc: 10.14 years). Retrieved 8 November 2011.
    6. "NEODyS-2 Close Approaches for 2002JE9". Near Earth Objects - Dynamic Site. Retrieved 8 November 2011.
    7. "2002JE9 Ephemerides for 11 April 1971". NEODyS (Near Earth Objects - Dynamic Site). Retrieved 8 November 2011.
    8. "Classic Satellites of the Solar System". Observatorio ARVAL. Archived from the original on 31 July 2010. Retrieved 25 June 2010.
    Preceded by
    (163132) 2002 CU11    		 Large NEO Earth close approach
    (inside the orbit of the Moon)
    11 April 1971    		 Succeeded by
    2002 MN

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