Astronomy:1006 Lagrangea

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1006 Lagrangea
Discovery[1]
Discovered byS. Belyavskyj
Discovery siteSimeiz Obs.
Discovery date12 September 1923
Designations
(1006) Lagrangea
Pronunciation/ləˈɡrɒndʒiə/[4]
Named afterJoseph-Louis Lagrange
(Italian astronomer)[2]
1923 OU
Minor planet categorymain-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc93.73 yr (34,235 days)
|{{{apsis}}}|helion}}4.2641 AU
|{{{apsis}}}|helion}}2.0210 AU
3.1425 AU
Eccentricity0.3569
Orbital period5.57 yr (2,035 days)
Mean anomaly283.17°
Mean motion0° 10m 36.84s / day
Inclination10.917°
Longitude of ascending node294.59°
86.231°
Physical characteristics
Dimensions29.53 km (derived)[3]
29.56±2.3 km[5]
30.36±6.84 km[6]
32.24±1.16 km[7]
35.310±0.345 km[8][9]
Rotation period32.79±0.06 h[10]
Geometric albedo0.046±0.006[8]
0.0469±0.0064[9]
0.058±0.005[7]
0.06±0.03[6]
0.0612 (derived)[3]
0.0670±0.012[5]
D[11] · C[3]
Absolute magnitude (H)11.20[5][7][9] · 11.30[1][3][6] · 11.36±0.19[11]


Lagrangea (minor planet designation: 1006 Lagrangea), provisional designation 1923 OU, is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 12 September 1923, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula.[12] The asteroid was named after Italian mathematician and astronomer Joseph-Louis Lagrange.[2]

Orbit and classification

Lagrangea is not a member of any known asteroid family. It orbits the Sun in the outer main belt at a distance of 2.0–4.3 AU once every 5 years and 7 months (2,035 days). Its orbit has an eccentricity of 0.36 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins at the discovering observatory, 4 days after its official discovery observation.[12]

Physical characteristics

Lagrangea has been characterized as a dark D-type asteroid by Pan-STARRS photometric survey, while the LCDB assumes a generic, carbonaceous C-type.[3][11]

Rotation period

In September 2001, a rotational lightcurve of Lagrangea was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. Lightcurve analysis gave a longer-than-average rotation period of 32.79 hours with a brightness amplitude of 0.17 magnitude.[10] As the lightcurve has received a low quality rating, the obtained period must be considered tentative ({{{1}}}).[3]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lagrangea measures between 29.56 and 35.31 kilometers in diameter and its surface has an albedo between 0.046 and 0.067.[5][6][7][8][9]

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0612 and a diameter of 29.53 kilometers based on an absolute magnitude of 11.3.[3]

Naming

This minor planet was named after Italian mathematician Joseph-Louis Lagrange (1736–1813), who made significant contributions to astronomy, in particular celestial mechanics. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 96). The Lagrangian points are named after him. He is also honored by the lunar crater Lagrange.[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 1006 Lagrangea (1923 OU)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001006. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1006) Lagrangea". Dictionary of Minor Planet Names – (1006) Lagrangea. Springer Berlin Heidelberg. p. 87. doi:10.1007/978-3-540-29925-7_1007. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "LCDB Data for (1006) Lagrangea". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1006%7CLagrangea. 
  4. ↑ Lagrangian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Lagrangian  (Subscription or UK public library membership required.)
  5. ↑ 5.0 5.1 5.2 5.3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019. 
  6. ↑ 6.0 6.1 6.2 6.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015ApJ...814..117N. Retrieved 29 August 2017. 
  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 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 29 August 2017. 
  9. ↑ 9.0 9.1 9.2 9.3 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. 
  10. ↑ 10.0 10.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1006) Lagrangea". Geneva Observatory. http://obswww.unige.ch/~behrend/page3cou.html#001006. 
  11. ↑ 11.0 11.1 11.2 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 29 August 2017. 
  12. ↑ 12.0 12.1 "1006 Lagrangea (1923 OU)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1006. 

External links



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