720 Bohlinia

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720 Bohlinia
720Bohlinia (Lightcurve Inversion).png
A three-dimensional model of 720 Bohlinia based on its light curve.
Discovered by Franz Kaiser
Discovery site Heidelberg
Discovery date October 18, 1911
1911 MW
Orbital characteristics
Epoch August 18, 2005 (JDCT 2453600.5)
Aphelion 2.928 AU
Perihelion 2.848 AU
2.888 AU
Eccentricity 0.014
4.908 a
Inclination 2.359°
Physical characteristics
Dimensions 34.64 ± 1.81[1] km
Mass (5.97 ± 0.80) × 1016[1] kg
Mean density
2.74 ± 0.56[1] g/cm3
Albedo 0.203[2]

720 Bohlinia is a minor planet orbiting the Sun that was discovered by Franz Kaiser, a German astronomer in 1911. It is named for Swedish astronomer Karl Petrus Theodor Bohlin, to mark his 65th birthday.[3] He had worked on the orbits of asteroids.[4]

It is one of the Koronis family of asteroids. A group of astronomers, including Lucy d’Escoffier Crespo da Silva and Richard P. Binzel, used observations made between 1998 through 2000 to determine the spin-vector alignment of these asteroids. The collaborative work resulted in the creation of 61 new individual rotation lightcurves to augment previous published observations.[5]

Binzel and Schelte Bus further added to the knowledge about this asteroid in a lightwave survey published in 2003. This project was known as Small Main-belt Asteroid Spectroscopic Survey, Phase II or SMASSII, which built on a previous survey of the main-belt asteroids. The visible-wavelength (0.435-0.925 micrometre) spectra data was gathered between August 1993 and March 1999.[6]


  1. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  2. ^ a b Delbo', Marco; Tanga, Paolo (February 2009), "Thermal inertia of main belt asteroids smaller than 100 km from IRAS data", Planetary and Space Science 57 (2): 259–265, arXiv:0808.0869, Bibcode:2009P&SS...57..259D, doi:10.1016/j.pss.2008.06.015. 
  3. ^ http://ssd.jpl.nasa.gov/sbdb.cgi#top
  4. ^ Hockey, Thomas (2009). The Biographical Encyclopedia of Astronomers. Springer Publishing. ISBN 978-0-387-31022-0. Retrieved August 22, 2012. 
  5. ^ Slivan, S. M., Binzel, R. P., Crespo da Silva, L. D., Kaasalainen, M., Lyndaker, M. M., Krco, M.: “Spin vectors in the Koronis family: comprehensive results from two independent analyses of 213 rotation lightcurves,”Icarus, 162, 2003, pp. 285–307.
  6. ^ Bus, S., Binzel, R. P. Small Main-belt Asteroid Spectroscopic Survey, Phase II. EAR-A-I0028-4-SBN0001/SMASSII-V1.0. NASA Planetary Data System, 2003.

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