Astronomy:(467336) 2002 LT38

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(467336) 2002 LT38
Discovery[1][2]
Discovered byLINEAR
Discovery siteLincoln Lab's ETS
Discovery date12 June 2002
Designations
(467336) 2002 LT38
2002 LT38
Minor planet categoryNEO · Aten · PHA[1][2]  
Orbital characteristics[1]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc14.09 yr (5,148 days)
|{{{apsis}}}|helion}}1.1103 AU
|{{{apsis}}}|helion}}0.5799 AU
0.8451 AU
Eccentricity0.3138
Orbital period0.78 yr (284 days)
Mean anomaly316.03°
Mean motion1° 16m 7.32s / day
Inclination6.1959°
Longitude of ascending node259.41°
162.73°
Earth MOID0.0344 AU (13.4 LD)
Physical characteristics
Mean diameter0.236 km (calculated)[3]
0.240 km (est. at 0.20)[4]
Rotation period21.80±0.05 h[5][lower-alpha 1]
Geometric albedo0.20 (assumed)[3]
S (assumed)[3]
Absolute magnitude (H)20.5[1][3]


(467336) 2002 LT38, is a sub-kilometer asteroid and suspected tumbler, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, approximately 240 meters (790 ft) in diameter. It was discovered on 12 June 2002, by astronomers of the Lincoln Near-Earth Asteroid Research at the Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States.[2]

Orbit and classification

2002 LT38 orbits the Sun at a distance of 0.6–1.1 AU once every 9 months (284 days; semi-major axis of 0.85 AU). Its orbit has an eccentricity of 0.31 and an inclination of 6° with respect to the ecliptic.[1]

The body's observation arc begins with a precovery taken at AMOS on 10 June 2002, two nights prior to its official discovery observation at Lincoln Lab's ETS.[2]

Close approaches

2002 LT38 has an Earth minimum orbital intersection distance of 0.0344 AU (5,150,000 km) which corresponds to 13.4 lunar distances.[1] It will pass at that distance during its close encounter with Earth on 27 June 2030.[1]

Earth Approaches on 24 June 2023 and 27 June 2030[1]
Date JPL Horizons
nominal geocentric
distance (AU) 		uncertainty
region
(3-sigma)
2023-Jun-24 18:28 0.04450 astronomical unit|AU (6.657 million km)[1] ±31 km[6]
2030-Jun-27 23:13 0.03447 astronomical unit|AU (5.157 million km)[1] ±23 km[7]

Physical characteristics

The asteroid is an assumed stony S-type asteroid.[3]

Rotation period

In July 2016, a first rotational lightcurve of 2002 LT38 was obtained from photometric observations by American astronomer Brian Warner at his Palmer Divide Station in California (U82). Lightcurve analysis gave a longer-than average rotation period of 21.80 hours with a brightness variation of 1.16 magnitude ({{{1}}}).[5][lower-alpha 1] A high brightness amplitude typically indicates that the body has a non-spherical, elongated shape. It is also a suspected tumbler.[5]

Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 0.236 kilometers based on an absolute magnitude of 20.5.[3]

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 21 May 2016, after its orbit determination became sufficiently secure (M.P.C. 100286).[8] As of 2018, it has not been named.[2]

Notes

  1. ↑ 1.0 1.1 Lightcurve plot of (467336) 2002 LT38 by Brian Warner, Palmer Divide Station, California (2016). Rotation period 21.80±0.05 hours with a brightness amplitude of 1.16±0.05 mag. Quality Code of 2+. Summary figures at the LCDB. Observers comment: "There may be some indications of tumbling in the lightcurve, for example, the 'break' in the Fourier curve around 0.45 rotation phase".

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 "JPL Small-Body Database Browser: 467336 (2002 LT38)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=467336&view=OPC. Retrieved 27 February 2018. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 "467336 (2002 LT38)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=467336. Retrieved 27 February 2018. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (467336)". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=467336%7C. Retrieved 23 November 2017. 
  4. ↑ "Asteroid Size Estimator". CNEOS NASA/JPL. https://cneos.jpl.nasa.gov/tools/ast_size_est.html. Retrieved 12 November 2017. 
  5. ↑ 5.0 5.1 5.2 Warner, Brian D. (January 2017). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 July-September". The Minor Planet Bulletin 44 (1): 22–36. ISSN 1052-8091. Bibcode: 2017MPBu...44...22W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2017MPBu...44...22W. Retrieved 23 November 2017. 
  6. ↑ "Horizons Batch for 2023-06-24 Close Approach". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272002+LT38%27&START_TIME=%272023-06-24%2018:28%27&STOP_TIME=%272023-06-25%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27. Retrieved 2022-10-25.  RNG_3sigma = uncertainty range in km. (JPL#72/Soln.date: 2021-Apr-14 generates RNG_3sigma = 31 km)
  7. ↑ "Horizons Batch for 2030-06-27 Close Approach". JPL Horizons. https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%272002+LT38%27&START_TIME=%272030-06-27%2023:13%27&STOP_TIME=%272030-06-28%27&STEP_SIZE=%271%20day%27&QUANTITIES=%2720,39%27. Retrieved 2022-10-25.  RNG_3sigma = uncertainty range in km. (JPL#72/Soln.date: 2021-Apr-14 generates RNG_3sigma = 23 km)
  8. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. Retrieved 23 November 2017. 

External links



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