Universidad Complutense de Madrid
	Facultad de Físicas   Astrofísica	Observatorio UCM

Cometa 17P/Holmes

El cometa es 17P Holmes, un cometa periódico (el 17 en catalogarse, descubierto en 1892 por el astrónomo Edwin Holmes) con período de 7 años y que se puede observar estos días en la constelación de Perseo.

Posición en el cielo

Imágenes realizadas en el Observatorio UCM (Oct - Nov 2007)

Expansión del día 25 oct al 5 nov 2007 Camara Nikon D70 - Meade 12" - David Montes

Desplazamiento sobre el fondo del día 28 oct al 5 nov 2007 Camara Nikon D70 - Meade 12" - David Montes

Noticias:

• 17P/Holmes - Agrupación astronómica isla de La Palma

  According to IAU Circular 8886, issued today by the Central Bureau for Astronomical Telegrams in Cambridge, Massachusetts, A. Henríquez Santana at Tenerife, Canary Islands, was the first to notice the outburst shortly after local midnight on Wednesday morning, October 24th. The comet was then about 8th magnitude, but within minutes Ramon Naves and colleagues in Barcelona, Spain, caught it at magnitude 7.3

• Un brutal estallido de brillo en el 17P/Holmes (Rastreadores de Cometas) - (24 Octubre 2007)

  En los primeros minutos del día miércoles 24 de octubre observadores de España detectaron un creciente aumento del brillo de este cometa que rondaba la magnitud visual 14,7.

• Incredible comet eruption: from under 17th to 3rd magnitude in hours! - (24 Octubre 2007)

  A most amazing eruption is occuring on comet 17P/Holmes which was at 17 mag. at best but on October 24 suddenly began to brighten like crazy:

• Comet eruption - 17P/Holmes (24 Oct 2007) - Strange Comet (25 Oct 2007) - Exploding Comet (27 Oct 2007) (spaceweather)

  - The comet has no tail, a remarkable golden color, and october 24 it shocked astronomers with a spectacular eruption, brightening almost a million-fold from 17th to 2.5th magnitude in a matter of hours.
  - Astronomers around the world agree, Comet 17P/Holmes is one of the strangest things ever to explode in the night sky.
  - A gaseous cloud is racing away from the comet's core almost doubling in size from night to night.

• Outburst - 17P/Holmes Gary W. Kronk's Cometography - (24 Octubre 2007)

  The comet was observed at about magnitude 14.5 since July and had showed signs of a slow fading; however, very early on the morning of October 24, Juan Antonio Henríquez Santana (Spain) reported that the comet was much brighter than expected. This was all rapidly confirmed. One comet observer, Bob King (Minnesota, USA), made one of the confirming observations on October 24.17 and gave the magnitude as 7.1. He described it as appearing like a yellowish star. Interestingly, he reobserved the comet on October 24.47 and gave the magnitude as 4.0 with the naked eye!! Seiichi Yoshida (Japan) observed the comet on October 24.55 and gave the naked-eye magnitude as 3.5. Further observations by Yoshida gave the naked-eye magnitude as 3.0 on October 24.63 and 2.8 on October 24.72.

• Sudden Naked-Eye Comet Shocks the Astronomy World Sky & Telescope - (25 Octubre 2007)
• Unexpected Brightening of Comet 17P/Holmes ESA - (25 Octubre 2007)
• Old Comet Still Kicks Up Its Heels! CfA - (26 Octubre 2007)
• El cometa 17P/Holmes y su repentino aumento de brillo weblog: Cuaderno de bitácora estelar - (29 Oct 2007)
• Seguimiento del sorprendente cometa 17P/Holmes desde el Observatorio UCM weblog: Cuaderno de bitácora estelar - (30 Oct 2007)
• El cometa 17P/Holmes aumenta su tamaño un 10 por ciento IAC - (31 Oct 2007)
• Comet Holmes Bigger Than The Sun IfA University of Hawaii - (9 Nov 2007)
• Hubble Zooms in on Heart of Mystery Comet HST - (15 nov 2007)

Enlaces:

• Comet 17P/Holmes Orbital Elements & Ephemeris - daily ephemeris Minor Planet Center, IAU
• Comet 17P/Holmes 3D Orbit (JPL)
• Comet 17P/Holmes orbit animated! (Shadow and Substance)
• Comet 17P/Holmes Gary W. Kronk's Cometography
• Comet 17P/Holmes Seiichi Yoshida

Imágenes y espectros:

• Comet 17P/Holmes Photogallery Spaceweather
• Spectroscopic observations of comet 17P/Holmes Christian Buil - Spectroscopy, CCD & Astronomy

Cometas   Galeria de Imágenes, Observatorio UCM

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David Montes ... e-mail: webmasterastrax.fis.ucm.es