(53319) 1999 JM8

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(53319) 1999 JM8
Tholen)[9]
15.00[10] · 15.14±0.38[11] · 15.2[1][9] · 16.5[4]

(53319) 1999 JM8 is an

Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico.[2]

Orbit and classification

1999 JM8 orbits the Sun at a distance of 1.0–4.5 

Mars-crossing asteroid
.

The body's observation arc begins with its first identification as 1990 HD1 at Palomar Observatory in April 1990, more than 9 years prior to its official discovery observation at Socorro.[2]

Close approaches

1999 JM8 has an Earth

minimum orbital intersection distance of 0.0258 AU (3,860,000 km; 10.0 LD)[1] It passed closer than 0.20 AU to the Earth five times in the last century (0.033 AU in 1990), but its next closest approach in the 21st century will be in 2075 at 0.256 au (38,300,000 km; 23,800,000 mi; 100 LD) and in August 2137 at 0.0764 au (11,430,000 km; 7,100,000 mi; 29.7 LD).[1] For comparison, the planet Venus passed 103 LD (40,000,000 km; 25,000,000 mi) from Earth in 2022
.

Physical characteristics

Radar images and computer models of (53319) 1999 JM8

In the

Tholen classification, 1999 JM8 is an X-type asteroid.[1][9] It has also been characterized as a carbonaceous C-type asteroid, which seems more likely due to its exceptionally low albedo (see below).[10]

A radar image of (53319) 1999 JM8, showing two large craters or basins on its surface

Rotation period

rotation period, similar to that of asteroid 4179 Toutatis.[9][5]

In July 1999, a rotational

U=2), and suggested that the body is in a non-principal axis rotation, commonly known as tumbling.[8]

Diameter and albedo

1999 JM8 measures between 5 and 7 kilometers in diameter and its surface has an exceptionally low

albedo of 0.02.[3][4][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.03 and adopts a diameter of 7 kilometers based on an absolute magnitude of 15.2.[9]

Numbering and naming

This

numbered by the Minor Planet Center on 16 February 2003.[13] As of 2018, it has not been named.[2]

References

  1. ^ a b c d e f g h i "JPL Small-Body Database Browser: 53319 (1999 JM8)" (2017-11-21 last obs.). Jet Propulsion Laboratory. Retrieved 23 November 2017.
  2. ^ a b c d e "53319 (1999 JM8)". Minor Planet Center. Retrieved 23 November 2017.
  3. ^
    Bibcode:2001AAS...198.8907B
    . Retrieved 23 November 2017.
  4. ^
    doi:10.1016/j.icarus.2012.03.005
    . Retrieved 23 November 2017.
  5. ^
    Bibcode:2012LPICo1667.6183B
    . Retrieved 23 November 2017.
  6. ^
    Bibcode:2001DPS....33.6106B
    . Retrieved 23 November 2017.
  7. ^
    doi:10.1111/j.1945-5100.2002.tb00855.x
    . Retrieved 23 November 2017.
  8. ^
    doi:10.1016/j.icarus.2004.07.021
    . Retrieved 23 November 2017.
  9. ^ a b c d e f "LCDB Data for (53319)". Asteroid Lightcurve Database (LCDB). Retrieved 23 November 2017.
  10. ^
    S2CID 119258489
    . Retrieved 23 November 2017.
  11. S2CID 53493339
    . Retrieved 23 November 2017.
  12. ^ "3200 Phaethon".
  13. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018.

External links

Wikimedia Commons has media related to (53319) 1999 JM8.
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