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Posts Tagged ‘Virgo’

C/2013 US10 Catalina – A Christmas Comet

December 18, 2015 Leave a comment

Comet-Catalina2alt-1280-5-750

I last viewed Comet Catalina in August when it was only visible in the southern hemisphere. It is now visible low in the east during the early hours of the morning around 5am, but will be steadily gaining in height throughout December and January. It is currently magnitude 6 and easily seen in 8x or 10x binoculars as a faint grey smudge in the constellation Virgo.

The comet is displaying a couple of really nice, widely separated, tails at the moment with the fainter ion gas tail at the bottom, blown at high speed away from the direction of the Sun by the solar wind. The dust tail at the top is moving much more slowly away from the comet. Having been dislodged from it’s home in the Oort Cloud recently on a hyperbolic trajectory Catalina is making just one approach into the Solar System before vanishing back out and never to be seen again. The comet reached perihelion, it’s closest approach to the Sun, on November 15th and is now on the journey out.

Image taken 18/12/15 5.37am New Mexico time on iTelescope.Net T20. 4 x 300 sec Luminance. RA: 14h 17m 18.0s DEC: 01° 13′ 51″ (J2000). Stacked in DeepSkyStacker 3, Processed in Maxim DL5 and Photoshop CS2.

 

Bright new Supernova SN2012cg in Galaxy NGC 4424

On May 17th the automated Lick Supernova Search discovered the SN 2012cg supernova in galaxy NGC 4424 in the constellation Virgo. From 18th magnitude it has now brightened to 12.0 and rivals the core of the galaxy for brightness. This exploding star was originally a White Dwarf star equivalent in mass to our own Sun and locked in a binary orbit with a much larger star. It steadily drew matter from this companion star up to a point where it became unstable, collapsed in on itself and exploded, producing what is known as a Type Ia supernova. This spectacular event should be visible in telescopes of 6″ diameter and above.

Image taken Sunday June 11th 00.59 am from Nerpio, Spain with iTelescope T7 Planewave 17″ CDK, SBIG STL-11000M. 300 sec Bin 2. RA: 12h 27m 11.9s DEC: 09° 25′ 01″ (J2000)