Asteroid 298 Baptistina (apparent magnitude 15.2) near a mag 15.3 star
|Discovered by||Auguste Charlois|
|Discovery date||9 September 1890|
|MPC designation||(298) Baptistina|
|Epoch 31 July 2016 (JD 2457600.5)|
|Uncertainty parameter 0|
|Observation arc||123.99 yr (45289 d)|
|Aphelion||2.4805 AU (371.08 Gm)|
|Perihelion||2.0475 AU (306.30 Gm)|
|2.2640 AU (338.69 Gm)|
|3.41 yr (1244.3 d)|
|0° 17m 21.588s / day|
|16.23 h (0.676 d)|
A 2007 US-Czech study decided that 298 Baptistina may be the biggest remnant of a 170 km (110 mile) asteroid that was destroyed about 160 million years ago in an impact with a smaller body, making the Baptistina family of asteroids and that the Baptistina event may have created the eventual impact asteroid believed by many to have caused the K/T extinction event about 65 million years ago. This is the K/T impactor believed to be shown in the geological record. This theory has not, as yet, found general acceptance among the scientific community.
- "298 Baptistina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
- Reddy V., et al. (2008). Composition of 298 Baptistina: Implications for K–T Impactor Link, Asteroids, Comets, Meteors conference.
- Majaess D., Higgins D., Molnar L., Haegert M., Lane D., Turner D., Nielsen I. (2008). New Constraints on the Asteroid 298 Baptistina, the Alleged Family Member of the K/T Impactor, accepted for publication in the JRASC
- M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)
- Bottke WF, Vokrouhlický D Nesvorný D. (2007) An asteroid breakup 160 Myr ago as the probable source of the K/T impactor. Nature 449, 48-53
- "Space pile-up 'condemned dinos'". Sept. 5, 2007.