2013 JX28

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2013 JX28
Discovery[1]
Discovered by Pan-STARRS 1
Discovery date 11 May 2013 (25 May 2006)
Designations
2006 KZ39
Atira (Aten asteroid subclass)
Near-Earth object[2]
Orbital characteristics
Epoch 2014-dec-9 (JD 2457000.5)
Aphelion

0.9397696

±0.000 000 041 742
Perihelion

0.2619078 (q)

±0.000 000 112 300

0.6008387 (a)

±0.000 000 026 687
Eccentricity

0.5640963

±0.000 000 180 300
0.47 years (171.6 days)
311.78093°
Inclination

10.76338°

±0.000 143 670

39.96605°

±0.000 110 330

354.87858°

±0.000 145 050
Physical characteristics
Dimensions ~300 m[3]
20.1[2]

2013 JX28 (also known as 2006 KZ39) is an Atira asteroid, a type of Aten asteroid, that orbits entirely within Earth's orbit. It orbits very close to the Sun, having the second smallest semi-major axis of any minor planet in the Solar System. At its closest, it is only 0.26 AU (39,000,000 km; 24,000,000 mi) from the Sun, but more than 100 minor planets have a smaller perihelion distance.

Despite being officially classified as a near-Earth object, 2013 JX28 has a MOID (minimum orbit intersection distance) with Earth of ~0.067 AU,[2] making it highly unlikely to ever hit Earth. For comparison, the Moon orbits Earth at about 1/26th this distance.

Physical characteristics[edit]

2013 JX28 has an absolute magnitude (H) of 20.1,[2] which means it is rather small, with the size being approximately 300 meters based on an assumed albedo of 0.15.[3] Its albedo is not known, so a size estimate is not certain. Assuming the albedo is between 0.05 and 0.25, it is somewhere between 260–580 meters in diameter.[4]

163693 Atira, an asteroid with an orbit similar to 2013 JX28, for comparison, has an absolute magnitude of 16.28 and is notably larger.

Close approaches[edit]

As a near-Earth object,[2] 2013 JX28 often comes within 0.1 AU (15,000,000 km; 9,300,000 mi)] of Earth. On 29 April 2014, it traveled to 0.0843 AU from Earth, about 33 times further than the Moon. Below is a list of close approaches until 2100 where 2013 JX28 travels closer than 0.1 AU to Earth.

date distance (AU)[2]
2000-04-20 0.0913
2007-04-25 0.0682
2014-04-29 0.0843
2034-04-21 0.0888
2041-04-25 0.0680
2048-04-29 0.0849
2068-04-21 0.0863
2075-04-26 0.0676
2082-04-30 0.0890

References[edit]

  1. ^ "List Of Aten Minor Planets (by designation)". IAU minor planet center. Retrieved 9 February 2014. 
  2. ^ a b c d e f "2013 JX28". JPL small-body database. Jet Propulsion Laboratory. Retrieved 9 February 2014. 
  3. ^ a b "Conversion of Absolute Magnitude to Diameter". SFA texas university. Physics and astronomy department. Retrieved 9 February 2014. 
  4. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-02-15.