With the recent discovery of Nova Scorpii 2021, three bright stellar explosions are now visible in small telescopes from dusk till dawn.
© Rob KaufmanThe new bright nova, V1710 Scorpii, glows conspicuously red in this photo taken on April 14, 2021. It's the third nova discovered in recent weeks that has reached 9th magnitude or brighter.
Wait a minute. Am I going to have to set the alarm and get up at 4 a.m.? Absolutely. And I'll do it without complaint.
Not only are the recent novae in Cassiopeia and Sagittarius still bright at magnitudes at 8.1 and 9.9, respectively, but a brand new nova in Scorpius has just joined the scene. Add in
Comet ATLAS (C/2020 R4), now at magnitude 9.5, and you know in your heart a dawn observing session is in your future.
Amateur astronomer Paul Camilleri of Northern Territory, Australia and the
All-Sky Automated Survey for Supernovae (ASAS-SN) independently discovered the new object early on April 12th at visual magnitude 9.5. Formally named V1710 Scorpii, it brightened quickly to 8.5 before fading slightly, now simmering around 9.5 as of early April 15th. Oscillations like these are common, so the nova might continue to fade or re-brighten just as suddenly.
In an email, Camilleri shared a happy coincidence: "Interestingly, this discovery is my 10th nova, and it was found 30 years to the day of my first discovery in April 1991 and a few days short of my last discovery (April 14, 1993) some 28 years ago."
© Paul CamillariThis is Paul Camilleri's discovery image taken on April 12.7625 UT with a Nikon D3200 DSLR and 85mm f/2 lens. The exposure was five seconds at ISO 6400. Since it was made on a tripod without a tracking mount, the stars are slightly trailed.
He noted that the nova had an orange color on his photos, likely caused by emission from ionized hydrogen in the thin, expanding shell of gases ejected during the explosion.
Spectra indicate that the object is a
classical nova, meaning this is its first recorded eruption, and it belongs to the
Fe II class, where prominent emission lines of ionized iron stand out in its spectrum.
Comment: It is likely that atmospheric dust loading from increased comet and volcanic activity is contributing to the 'strange skies' we are witnessing, the cooling effect of which causes ice crystals to form. See also: