RA 10h36m13.7s, DEC -59°35'53.9" (J200.0)
Discoverer: All Sky Automated Survey for SuperNovae (ASAS-SN)
"ASAS-SN Discovery of a Possible, Very Bright Galactic Nova ASASSN-18fv" (ATel #11454): http://www.astronomerstelegram.org/?read=11454
ASAS.SN images: http://www.astronomy.ohio-state.edu/asassn/followup/asassn-18av.jpg
ASAS-SN lightcurve: https://asas-sn.osu.edu/light_curves/d4516005-ae77-4260-accc-2ce6382cb9…
ASASSN-18fv 20180315.34 <170V ASN
ASASSN-18fv 20180316.32 104V ASN
ASASSN-18fv 20180320.32 >100V ASN
Spectroscopy and precise astrometry are urgently required.
Sebastián Otero's earlier thread here: https://www.aavso.org/bright-nova-carina
Earlier thread here: https://www.aavso.org/bright-nova-carina
2018 March 21.47 UT: V= 6.62, B= 7.19 mag
M. J. I. Brown, J. Upjohn, E. Rol, A. Obradovic, D. K. Galloway, K. Ackley, J. Davies, C. Lane, S. Olofsson, N. Reader (Monash University): "Photometry and brightening of Galactic transient ASASSN-18fv" (ATel #11457)
Paul Luckas (International Centre for Radio Astronomy Research, University of Western Australia): "Spectroscopic Observations of ASASSN-18fv as a Classical Nova in the Iron Curtain Phase" (ATel #11460)
I agree Sebastian, it is not an object for small binoculars. I took a low-res optical spectrum last night (21 Mar) and it appeared featureless, with no obvious emissions or absorptions. It's a hard one to get a clear spectrum on at the scale I shoot because of the proximity of the bright star (and other bright stars in the vicinity). Estimate roughly mag 6.5 on 21.635 March 2018 UT. I've attached a widefield image showing the Eta Carinae Nebula - pretty part of the sky!
Rob Kaufman KBJ
A friend made me realize that I am not resolving the nova and the 9.4 red companion (which is slightly variable) in my visual observations made with 7x50 binoculars. I am applying a correction to subtract the light of that star now.
It amounts to 0.06 at mag. 6.3 and 0.09 at mag. 6.6.
Posted here because others may be also suffering from the same issue.