Astronomy:5430 Luu

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5430 Luu
Discovery [1]
Discovered byC. Shoemaker
E. M. Shoemaker
Discovery sitePalomar Obs.
Discovery date12 May 1988
Designations
(5430) Luu
Named afterJane Luu
(American astronomer)[2]
1988 JA1 · 1970 OL
Minor planet categorymain-belt · Phocaea [3][4]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc46.86 yr (17,114 days)
|{{{apsis}}}|helion}}2.8929 AU
|{{{apsis}}}|helion}}1.8356 AU
2.3642 AU
Eccentricity0.2236
Orbital period3.64 yr (1,328 days)
Mean anomaly20.073°
Mean motion0° 16m 15.96s / day
Inclination23.894°
Longitude of ascending node123.00°
122.11°
Physical characteristics
Dimensions6.508±0.029 km[5]
6.659±0.043[6]
7.63 km (calculated)[3]
8.05±0.22 km[7]
8.27±0.25 km[8]
Rotation period4.44±0.05 h[9]
13.55±0.02 h[10]
Geometric albedo0.212±0.012[7]
0.215±0.036[8][6]
0.23 (assumed)[3]
0.3826±0.0839[5]
S [3]
Absolute magnitude (H)12.6[5] · 12.70[8] · 12.8[1][3][7] · 13.45±0.87[11]


5430 Luu, provisional designation 1988 JA1, is a stony Phocaea asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered on 12 May 1988, by American astronomer couple Carolyn and Eugene Shoemaker at Palomar Observatory, California, and later named after astronomer Jane Luu.[2][12]

Orbit and classification

Luu is a member of the Phocaea family (701).[4] It orbits the Sun in the inner main-belt at a distance of 1.8–2.9 AU once every 3 years and 8 months (1,328 days). Its orbit has an eccentricity of 0.22 and an inclination of 24° with respect to the ecliptic.[1] The first precovery was taken at Crimea–Nauchnij in 1970, extending the asteroid's observation arc by 18 years prior to its discovery.[12]

Physical characteristics

Luu has been characterized as a common S-type asteroid.[3]

Rotation period

In April 2006, photometric observations of Luu collected by American astronomer Brian D. Warner at his Palmer Divide Station, Colorado, show a rotation period of 13.55±0.02 hours with a brightness variation of 0.06±0.02 magnitude ({{{1}}}).[10] A second, tentative lightcurve was obtained by French astronomer René Roy in July 2007. It gave a period of 4.44±0.05 hours and an amplitude of 0.05 in magnitude ({{{1}}}).[9]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Luu measures 6.5 and 8.3 kilometers in diameter and its surface has an albedo between 0.21 and 0.26.[5][6][7][8]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.23 – derived from 25 Phocaea, the family's most massive member and namesake – and calculates a diameter of 7.6 kilometers with an absolute magnitude of 12.8.[3]

Naming

This minor planet is named in honor of Vietnamese-American astronomer Jane X. Luu (born 1963) for her research and discovering the first and subsequent members of the Kuiper Belt.[13] She also studied the physical properties of these bodies and the coma of potentially Extinct comets.[2] The approved naming citation was published by the Minor Planet Center on 1 July 1996 (M.P.C. 27459).[14]

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 5430 Luu (1988 JA1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005430. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(5430) Luu". Dictionary of Minor Planet Names – (5430) Luu. Springer Berlin Heidelberg. p. 464. doi:10.1007/978-3-540-29925-7_5209. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 "LCDB Data for (5430) Luu". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=5430%7CLuu. 
  4. ↑ 4.0 4.1 "Asteroid 5430 Luu – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=5430+Luu#Asteroid%205430%20LuuEAR-A-VARGBDET-5-NESVORNYFAM-V3.0. 
  5. ↑ 5.0 5.1 5.2 5.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...90M. Retrieved 14 August 2016. 
  6. ↑ 6.0 6.1 6.2 Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 5 December 2016. 
  7. ↑ 7.0 7.1 7.2 7.3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U.  (online, AcuA catalog p. 153)
  8. ↑ 8.0 8.1 8.2 8.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 14 August 2016. 
  9. ↑ 9.0 9.1 Behrend, Raoul. "Asteroids and comets rotation curves – (5430) Luu". Geneva Observatory. http://obswww.unige.ch/~behrend/page5cou.html#005430. 
  10. ↑ 10.0 10.1 Warner, Brian D. (December 2006), "Asteroid lightcurve analysis at the Palmer Divide Observatory - March - June 2006", The Minor Planet Bulletin 33 (4): 85–88, Bibcode: 2006MPBu...33...85W. 
  11. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 14 August 2016. 
  12. ↑ 12.0 12.1 "5430 Luu (1988 JA1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=5430. 
  13. ↑ John Keith Davies (2001). Beyond Pluto: Exploring the Outer Limits of the Solar System. Cambridge University Press. p. 219. ISBN 9781139428774. https://archive.org/details/beyondplutoexplo00davi. Retrieved 2012-06-01. "5430 Luu." 
  14. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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