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Tycho’s Supernova Remnant

B Cassiopeiae, SN 1572, 3C 10, HR 92

Supernova remnant in Cassiopeia

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Proper Name	Tycho's Supernova, Tycho's Supernova Remnant
Bayer Designation	B Cassiopeiae
HR (BSC)	92
Other Designations	SN 1572, 3C 10
Constellation	Cassiopeia
Right Ascension	0h 25m 22s
Declination	+64° 8' 27"
Distance	c.8,200 light years c.2,500 parsecs (highly approximate)
Magnitude	Apparent: +19 Absolute: +7 Apparent magnitude during 1572 supernova: -4
Diameter	Apparent: 8° Actual: c. 19 light years
Optimum Visibility	October (Usually visible from northern latitudes)

The faint remnant of the supernova observed by Tycho Brahe (among many others) in 1572 has now faded to the point that it is barely detectable in visible light. In this infrared image, however, the form of the remnant, still gradually expanding, can be seen as ghostly sphere. Imagery provided by Aladin sky atlas

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