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Sky Alerts

Dr Ian Musgrave  - iTelescope Science Advisor

An avid amateur astronomer, Ian writes the weekly sky updates for ABC Radio Science and is science adviser to iTelescope. When not staring at the sky he is an equally enthusiastic molecular pharmacologist at the University of Adelaide, Australia.

You can follow Ian Musgrave on his Astroblog for daily posts about astronomy, biology and life, the Universe and everything.

"Over at Astroblog I largely guide people to the view of the sky as seen with the unaided eye. But I’m also an iTelescope.Net user, and I’m very honoured to have been invited to highlight some of the interesting objects that can be seen through the iTelescopes.

While many people are familiar with the larger, more glamorous objects in the night sky that make good iTelescope targets, there are a host of lesser known, interesting objects that are well worth chasing such as fast moving Near Earth Objects, Novae and Comets."  Twitter @ianmusgrave

Entries in nova (24)


ALERT! Nova PNV J18205200-2822100 passes Magnitude 6.0

Chart of the location of PNV J18205200-2822100 (labelled Nova Sag 2016) as seen from the SSO scopes, the rectangle is the field of view of T12. The star next to Nov Sag 2016 is magnitude 6. Also shown is TCP J18102829-2729590 (labelled Nov Sag 2 2016) Currently magnitude 9 . Click to embiggen and print.

I have been out of commission with colds/flu's, so two nova exploded in Sagittarius, both near the teapot of Sagittarius. One, PNV J18205200-2822100,has been slowly increasing in brightness and has now broken the unaided eye brightness threshold of magnitude 6.0, with the latest report from New Zealand of 5.4.

PNV J18205200-2822100 is in the "teapot" of Sagittarius between Kaus Borealis (lambda Sagittarii and Kaus Media (delta Sagittarii), Howevere, it is just at the limit of scope trave just before astronomical twilight, giving a very narrow window of imaging.

Coordinates (2000.0): R.A. 18 20 52.25  Dec. -28 22 12.1


ALERT! Bright (Magnitude 6.9) Likely Galactic Nova

Location of the bright likely galactic nova in Lupus between the pointers and Antares as seen from SSO at Siding Spring in Australia looking west at 9:30 pm local time.  Visible only from the SSO scopes for around an hour after astronomical twilight, the latest astronomical telegram on 26/09/16 08:30 UT has the probable nova between 6.9 B and 6.3V. (Click to embiggen).

The Astronomical telegrams reported a bright probable nova ASASSN-16kt not far from epsilon Lupi at
RA 15:29:01.82, DEC -44:49:40.89 (J2000.0) at magnitude 9.1. The nova has rapdily brightened and is now almost unaided eye magnitude according to the latest astronomical telegram with its reported magnitude between between 6.9 B and 6.3V.

UPDATE: Nope definitely around magnitude 6 when I did proper estimates. On the other hand a quick and dirty visual estimate I just did suggested the nova was below mag 7, but then it was pretty low to the horizon at the time amongst the murk, but other dim stars were showing up.

Magnitude chart for nova Lupi magnitude estimates showing magnitudes from 5 to 7 (in a stupid format [988] means mag 9.88, [1098] means 10.08 etc.). The large rectangle is the field of view of T12, the small that of T9. Click to embiggen


ALERT! Bright (Magnitude 11) Galactic Nova

Location of the galactic Nova between Scorpius and Ophiuchus, between the Butterfly cluster and M62. The large rectangle is the field of view of iTelescope T12 the small that of T9. Click to embiggen.

An apparent nova of magnitude 11.4 has been detected in the direction of the galactic centre has been detected by the All Sky Automated Survey for SuperNovae. Follow up observations are urgently required. J2000 coordinates are:

RA 17:22:51.426 DEC -31:58:36.28

See more at


Magnitude chart for nova magnitude estimates showing magnitudes from 8 to 12 (in a stupid format [988] means mag 9.88, [1098] means 10.08 etc.). The rectangle is the field of view of T9 (sorry, sky map doesn't go lower than mag 12)


ALERT! Possible Nova (12.0 mag) in the Large Magellanic Cloud (LMC)

Location of the possible nova in the Large Magellanic cloud as seen from SSO. The small rectangle is the FOV of T9, the large that of T12. The nova is in a very crowded field. Click to embiggen.

(reposting Patrick Schmeer's notice on the iTeleacope FB site)

MASTER OT J051032.58-692130.4:
Possible Nova (12.0 mag) in the Large Magellanic Cloud (LMC)

"MASTER: very bright OT in Large Magellanic Cloud direction
MASTER OT J051032.58-692130.4 discovery - 12m OT in LMC"
ATel #9039:

R.A. 05h10m32.58s Decl. -69°21'30.4" (J2000.0)

A possible progenitor (21 mag) is listed in "The Initial Gaia Source List (IGSL)" (Smart, 2013) and the "Magellanic Clouds Photometric Survey: the LMC" (Zaritsky+, 2004):
- IGSL3 (05 10 32.580 -69 21 30.60)
BJ= 21.288, RF= 20.810, G= 20.931 mag
- MCPS (05 10 32.56 -69 21 30.9)
B= 21.490, V= 20.828, I= 20.547 mag

This possible nova is located 2' from SAO 249214 (V= 8.7 mag) and 9' from Nova LMC 2005.

Spectroscopy is urgently required.