298 Baptistina

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.)

298 Baptistina
Asteroid 298 Baptistina (apparent magnitude 15.2) near a mag 15.3 star
Discovery
Discovered byAuguste Charlois
Discovery date9 September 1890
Designations
(298) Baptistina
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc123.99 yr (45289 d)
Aphelion2.4805 AU (371.08 Gm)
Perihelion2.0475 AU (306.30 Gm)
2.2640 AU (338.69 Gm)
Eccentricity0.095630
3.41 yr (1244.3 d)
209.69°
0° 17m 21.588s / day
Inclination6.2884°
8.2161°
135.004°
Physical characteristics
Dimensions13–30 km[2][3]
X-type
11.2

    References

    1. "298 Baptistina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
    2. Reddy V., et al. (2008). Composition of 298 Baptistina: Implications for K–T Impactor Link, Asteroids, Comets, Meteors conference.
    3. 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 Archived 14 June 2017 at the Wayback Machine, 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.
    5. M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)
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