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 byFranz Kaiser
Discovery siteHeidelberg
Discovery date18 October 1911
MPC designation(720) Bohlinia
1911 MW
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc117.11 yr (42775 d)
Aphelion2.9376 AU (439.46 Gm)
Perihelion2.8371 AU (424.42 Gm)
2.8873 AU (431.93 Gm)
4.91 yr (1792.0 d)
0° 12m 3.204s / day
Physical characteristics
Mean radius
16.865±0.7 km[1]
17.32 ± 0.905 km[2]
Mass(5.97 ± 0.80) × 1016 kg[2]
Mean density
2.74 ± 0.56 g/cm3[2]
8.919 h (0.3716 d)

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.[4] He had worked on the orbits of asteroids.[5]

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.[6]

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.[7]


  1. ^ a b c d "720 Bohlinia (1911 MW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016.
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  3. ^ 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), pp. 259–265, arXiv:0808.0869, Bibcode:2009P&SS...57..259D, doi:10.1016/j.pss.2008.06.015.
  4. ^ http://ssd.jpl.nasa.gov/sbdb.cgi#top
  5. ^ Hockey, Thomas (2009). The Biographical Encyclopedia of Astronomers. Springer Publishing. ISBN 978-0-387-31022-0. Retrieved 22 August 2012.
  6. ^ 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.
  7. ^ 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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