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Nova in Hercules brightening fast – Astronomy Now

Nova in Hercules brightening fast – Astronomy Now
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Nova Cassiopeia 2021 suddenly brightens into naked-eye visibility – Astronomy Now


Nova Cas 2021, a ‘new star’ – a classical nova – discovered on 18 March 2021 in the northern constellation of Cassiopeia, has suddenly brightened in the past few days by around two magnitudes. It now shines at around magnitude +5.2, possibly within naked-eye range from a dark-sky UK location.
Nova Cas 2021 (V1405 Cas) has brightened by around two magnitudes in the past few days. The image on the left shows it on 5 May 2021 at 10:23 UT, while the one on the right, taken on 8 May 2021 at 10:03 UT, shows the recent outburst. Compare its brightness with the magnitude +6.6 star HIP 115691 to its lower-left (south-east). The open cluster Messier 52 is seen at the top of both frames. Both images have been cropped from the original. Images: Martin Mobberley. ....

United States , United Kingdom , Northern Ireland , Roberte Williams , Peter Vasey , Greg Smye Rumsby , Martin Mobberley , Ryuji Nakamura , International Astronomical Union , American Association Of Variable Star Observers , Space Telescope Science Institute Stsc , National Astronomical Observatory Of Japan , Nova Cas , National Astronomical Observatory , Seimei Telescope , Okayama Observatory , Astronomer Emeritus , Space Telescope Science Institute , Cerro Tololo Inter , American Observatory , American Association , Variable Star Observers , Asiago Novae , ஒன்றுபட்டது மாநிலங்களில் , ஒன்றுபட்டது கிஂக்டம் , வடக்கு ஐயர்ல்யாஂட் ,