Astronomy:1929 Kollaa

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1929 Kollaa
Discovery[1]
Discovered byY. Väisälä
Discovery siteTurku Obs.
Discovery date20 January 1939
Designations
(1929) Kollaa
Named afterKollaa River[2]
(river in Karelia)
1939 BS · 1939 CH
1943 GG · 1968 BH
1976 JF3
Minor planet categorymain-belt · Vestian[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc48.64 yr (17,766 days)
|{{{apsis}}}|helion}}2.5396 AU
|{{{apsis}}}|helion}}2.1862 AU
2.3629 AU
Eccentricity0.0748
Orbital period3.63 yr (1,327 days)
Mean anomaly226.60°
Mean motion0° 16m 17.04s / day
Inclination7.7797°
Longitude of ascending node65.429°
71.220°
Physical characteristics
Dimensions6.06 km (calculated)[3]
6.71±0.34 km[4]
7.772±0.147 km[5][6]
Rotation period2.980±0.005 h[lower-alpha 1]
2.9887±0.0004 h[7]
Geometric albedo0.3855±0.0958[5]
0.393±0.066[4][6]
0.4 (assumed)[3]
SMASS = V[1] · V[3]
Absolute magnitude (H)12.2[5] · 12.50[4] · 12.6[1] · 12.64±0.32[8] · 12.7[3]


1929 Kollaa, provisional designation 1939 BS, is a stony Vestian asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, on 20 January 1939.[9] The asteroid was named after the Kollaa River in what is now Russia.[2]

Orbit and classification

Kollaa is a member of the Vesta family. Vestian asteroids have a composition akin to cumulate eucrite meteorites and are thought to have originated deep within 4 Vesta's crust, possibly from the Rheasilvia crater, a large impact crater on its southern hemisphere near the South pole, formed as a result of a subcatastrophic collision. The asteroid Vesta is the main-belt's second-most-massive body after 1 Ceres.[10]

The asteroid orbits the Sun in the inner main-belt at a distance of 2.2–2.5 AU once every 3 years and 8 months (1,327 days). Its orbit has an eccentricity of 0.07 and an inclination of 8° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its discovery.[9]

Physical characteristics

In the SMASS taxonomy, Kollaa is a bright V-type asteroid.[1]

Lightcurves

It has a well-defined rotation period of 2.98 hours, derived from two rotational lightcurve analysis. In March 2004, photometric observations at the U.S. Magdalena Ridge Observatory in New Mexico rendered a period of 2.980 hours with a brightness variation of 0.20 in magnitude ({{{1}}}).[lower-alpha 1] In 2008 a second, concurring period was obtained by French amateur astronomer Pierre Antonini at his private Observatoire de Bédoin in France (132). It gave a period of 2.9887 hours and an amplitude 0.22 in magnitude ({{{1}}}).[7]

Diameter and albedo

According to the surveys carried out by NASA's Wide-field Infrared Survey Explorer and its subsequent NEOWISE mission, the body measures 6.7 and 7.7 kilometers in diameter, respectively, and its surface has an albedo 0.39.[4][5] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.40 and calculates a diameter of 6.4 kilometers with an absolute magnitude of 12.7.[3]

Naming

This minor planet is named after the Kollaa River in Karelia, the focal point of violent battles during the Finnish Winter War (1939–40).[2] The official naming citation was published by the Minor Planet Center on 1 August 1980 (M.P.C. 5450).[11]

Notes

  1. ↑ 1.0 1.1 Ryan (2007) web: rotation period 2.980±0.005 hours with a brightness amplitude of 0.22 mag. Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (1929) Kollaa from unpublished results by W. H. Ryan and E.V. Ryan, (2007).

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "JPL Small-Body Database Browser: 1929 Kollaa (1939 BS)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001929. 
  2. ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(1929) Kollaa". Dictionary of Minor Planet Names – (1929) Kollaa. Springer Berlin Heidelberg. p. 155. doi:10.1007/978-3-540-29925-7_1930. ISBN 978-3-540-00238-3. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Template:Cite LCDB
  4. ↑ 4.0 4.1 4.2 4.3 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 24 July 2016. 
  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 24 July 2016. 
  6. ↑ 6.0 6.1 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 8 December 2016. 
  7. ↑ 7.0 7.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1929) Kollaa". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001929. 
  8. ↑ 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 24 July 2016. 
  9. ↑ 9.0 9.1 "1929 Kollaa (1939 BS)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1929. 
  10. ↑ Kelley, Michael S.; Vilas, Faith; Gaffey, Michael J.; Abell, Paul A. (September 2003). "Quantified mineralogical evidence for a common origin of 1929 Kollaa with 4 Vesta and the HED meteorites". Icarus 165 (1): 215–218. doi:10.1016/S0019-1035(03)00149-0. Bibcode: 2003Icar..165..215K. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2003Icar..165..215K. Retrieved 18 January 2016. 
  11. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 



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