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[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 1
Observation arc 2893 days (7.92 yr)
Aphelion 0.9397700 AU (140.58759 Gm) (Q)
Perihelion 0.2618791 AU (39.17656 Gm) (q)
0.6008245 AU (89.88207 Gm) (a)
Eccentricity 0.5641339 (e)
0.47 yr (170.1 d)
78.308816° (M)
2.116326°/day (n)
Inclination 10.76379° (i)
39.96294° (Ω)
354.88173° (ω)
Earth MOID 0.0685652 AU (10.25721 Gm)
Jupiter MOID 4.48856 AU (671.479 Gm)
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 g "2013 JX28". JPL small-body database. Jet Propulsion Laboratory. Retrieved 3 April 2016. 
  3. ^ a b "Conversion of Absolute Magnitude to Diameter". SFA texas university. Physics and astronomy department. Archived from the original on 23 July 2011. Retrieved 9 February 2014. 
  4. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-02-15. 

External links[edit]