298 Baptistina

298 Baptistina
	Asteroid 298 Baptistina (apparent magnitude 15.2) near a mag 15.3 star
Discovery
Discovered by	Auguste Charlois
Discovery date	9 September 1890
Designations
MPC designation	(298) Baptistina
Minor planet category	Main belt; Baptistina family;
Orbital characteristics
	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)
Semi-major axis	2.2640 AU (338.69 Gm)
Eccentricity	0.095630
Orbital period (sidereal)	3.41 yr (1244.3 d)
Mean anomaly	209.69°
Mean motion	0° 17m 21.588s / day
Inclination	6.2884°
Longitude of ascending node	8.2161°
Argument of perihelion	135.004°
Physical characteristics
Dimensions	13–30 km
Synodic rotation period	16.23 h (0.676 d); 16.23±0.02 h;
Spectral type	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[]

^ ^a ^b "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.
^ ^a ^b 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
^ Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names. Springer Science & Business Media. p. 41. ISBN 978-3-540-00238-3.
^ M. Florczak et al. A Visible Spectroscopic Survey of the Flora Clan, Icarus Vol. 133, p. 233 (1998)

External links[]

Lightcurve plot of 298 Baptistina, Palmer Divide Observatory, B. D. Warner (2009)
Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)–(5000) – Minor Planet Center
298 Baptistina at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
298 Baptistina at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

[jpldata-1] "298 Baptistina". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.

[reddy2008-2] Reddy V., et al. (2008). Composition of 298 Baptistina: Implications for K–T Impactor Link, Asteroids, Comets, Meteors conference.

[majaess2008-3] 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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