298 Baptistina

298 Baptistina

Minor Planet | name=298 Baptistina
discoverer=Auguste Charlois
discovery_date=September 9, 1890
designations=
category=Main belt
epoch=30 January, 2005 (JD 2453400.5)
semimajor=338.683 Gm (2.264 AU)
perihelion=306.285 Gm (2.047 AU)
aphelion=371.081 Gm (2.481 AU)
eccentricity=0.096
period=1244.205 d (3.41 a)
inclination=6.285°
asc_node=8.346°
arg_peri=134.492°
mean_anomaly=74.903°
speed=19.8 km/s
dimensions= 13 - 30 km
mass="unknown"
density="unknown"
gravity="unknown"
escape_velocity="unknown"
rotation=16.23±0.02 hours
spectral_class= X-type
abs_mag=11.0
albedo="unknown"
temperature="unknown"

298 Baptistina is a typical Main belt asteroid. It was discovered 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 interloper. [M. Florczak et al "A Visible Spectroscopic Survey of the Flora Clan", Icarus Vol. 133, p. 233 (1998)]

A 2007 US-Czech study concluded that 298 Baptistina may be the largest remnant of a 170 km (110 mile) asteroid that was destroyed approximately 160 million years ago in an impact with a smaller body, producing the Baptistina family of asteroids and that the Baptistina event may have created the eventual impact asteroid believed by many to have caused the Cretaceous–Tertiary extinction event approximately 65 million years ago. [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] . This is the K/T impactor believed to be shown in the geological record. [" [http://news.bbc.co.uk/1/hi/sci/tech/6980468.stm Space pile-up 'condemned dinos'] ". Sept. 5, 2007.]

The asteroid has a rotational period of 16.23±0.02 hours.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", JRASC, submitted.]

References


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  • (298) baptistina — 298 Baptistina pas de photo Caractéristiques orbitales Époque 18 août 2005 (JJ 2453600.5) Demi grand axe 338,636×106 km (2,264 ua) Aph …   Wikipédia en Français

  • 298 Baptistina — (298) Baptistina 298 Baptistina pas de photo Caractéristiques orbitales Époque 18 août 2005 (JJ 2453600.5) Demi grand axe 338,636×106 km (2,264 ua) Aph …   Wikipédia en Français

  • (298) Baptistina — 298 Baptistina Caractéristiques orbitales Époque 18 août 2005 (JJ 2453600.5) Demi grand axe 338,636×106 km (2,264 ua) Aphélie 371,017×106 km (2,480 ua) Périhélie …   Wikipédia en Français

  • (298) Baptistina — Baptistina Descubrimiento Descubridor Auguste Charlois Fecha 9 de septiembre de 1890 Elementos orbitales …   Wikipedia Español

  • (298) Baptistina — Asteroid (298) Baptistina Eigenschaften des Orbits (Animation) Orbittyp Innerer Hauptgürtel Große Halbachse 2,264 AE …   Deutsch Wikipedia

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  • Baptistina family — The Baptistina family is an asteroid family that was likely produced by the breakup of an asteroid 170 km (110 miles) across 160 million years ago following an impact with a smaller body. The largest presumed remnant of this parent asteroid is… …   Wikipedia

  • Extinction Crétacé-Tertiaire — Badlands près de Drumheller, Alberta, où l érosion a découvert à l air libre la limite K–T …   Wikipédia en Français

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