298 Baptistina

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298 Baptistina
298Bap-LB1-mag15.jpg
Discovery
Discovered by Auguste Charlois
Discovery time September 9, 1890
Orbit
Reference date 30 January, 2005 (JD 2453400.5)
Longest distance from the Sun 371.081 Gm (2.481 AU)
Shortest distance from the Sun 306.285 Gm (2.047 AU)
Longest distance from the center of its orbital path
("semi-major axis")
338.683 Gm (2.264 AU)
How egg-shaped its orbit is
("eccentricity")
0.096
How long it takes to complete an orbit 1244.205 d (3.41 a)
Mean anomaly 74.903°
Angle above the reference plane
("inclination")
6.285°
Longitude of where it comes up through the reference plane 8.346°
Angle between its shortest distance from what it orbits around and where it comes up through the reference plane
("argument of periapsis")
134.492°
Size and Other Qualities
Measures 13 - 30 km
Mass unknown
Average density unknown
Slowest speed able to escape into space
("escape velocity")
unknown
How long it takes to turn around one time unknown
How much light it reflects unknown

298 Baptistina is a common Main belt asteroid. It was found by Auguste Charlois on September 9, 1890 in Nice.

Although it has an orbit similar to the Flora family asteroids, it was found to be an unrelated asteroid.[1]

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.[2] This is the K/T impactor believed to be shown in the geological record.[3] This theory has not, as yet, found general acceptance among the scientific community.

References[change | change source]

  1. M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)
  2. 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
  3. "Space pile-up 'condemned dinos'". Sept. 5, 2007.