720 Bohlinia
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. He had worked on the orbits of asteroids.
A three-dimensional model of 720 Bohlinia based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | Franz Kaiser |
| Discovery site | Heidelberg |
| Discovery date | 18 October 1911 |
| Designations | |
MPC designation | (720) Bohlinia |
Alternative designations | 1911 MW |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 117.11 yr (42775 d) |
| Aphelion | 2.9376 AU (439.46 Gm) |
| Perihelion | 2.8371 AU (424.42 Gm) |
Semi-major axis | 2.8873 AU (431.93 Gm) |
| Eccentricity | 0.017406 |
Orbital period (sidereal) | 4.91 yr (1792.0 d) |
Mean anomaly | 350.275° |
Mean motion | 0° 12m 3.204s / day |
| Inclination | 2.3562° |
Longitude of ascending node | 35.706° |
| 118.762° | |
| Physical characteristics | |
Mean radius | 16.865±0.7 km 17.32 ± 0.905 km |
| Mass | (5.97 ± 0.80) × 1016 kg |
Mean density | 2.74 ± 0.56 g/cm3 |
Synodic rotation period | 8.919 h (0.3716 d) |
| 0.203 0.2029±0.018 | |
| 9.71 9.6 | |
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.
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.