Astronomy:298 Baptistina

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Short description: Asteroid
298 Baptistina
298Bap-LB1-mag15.jpg
Asteroid 298 Baptistina (apparent magnitude 15.2) near a mag 15.3 star
Discovery
Discovered byAuguste Charlois
Discovery date9 September 1890
Designations
(298) Baptistina
A890 RB
Minor planet category
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.99 yr (45289 d)
|{{{apsis}}}|helion}}2.4805 astronomical unit|AU (371.08 Gm)
|{{{apsis}}}|helion}}2.0475 AU (306.30 Gm)
2.2640 AU (338.69 Gm)
Eccentricity0.095630
Orbital period3.41 yr (1244.3 d)
Mean anomaly209.69°
Mean motion0° 17m 21.588s / day
Inclination6.2884°
Longitude of ascending node8.2161°
135.004°
Physical characteristics
Dimensions13–30 km[2][3]
Rotation period
X-type
Absolute magnitude (H)11.2


Baptistina (minor planet designation: 298 Baptistina) is an asteroid orbiting in the asteroid belt. It is the namesake of the Baptistina family. It was discovered on 9 September 1890 by Auguste Charlois of Nice. The source of its name is unknown.[4] It measures about 13 to 30 kilometres (8 to 19 mi) in diameter. Although it has an orbit similar to the Flora family asteroids, Baptistina is an unrelated interloper.[5] It was once considered a possible source of the impactor that caused the extinction of the dinosaurs, a possibility ruled out by the Wide-field Infrared Survey Explorer (WISE) in 2011. (See Baptistina family.)

References

  1. Jump up to: 1.0 1.1 "298 Baptistina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=298;cad=1. 
  2. Reddy V., et al. (2008). Composition of 298 Baptistina: Implications for K–T Impactor Link, Asteroids, Comets, Meteors conference.
  3. Jump up to: 3.0 3.1 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
  4. Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 41. ISBN 978-3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA41. 
  5. M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)

External links