TCP J18292290-1430460 (N:)
https://www.aavso.org/vsx/index.php?view=detail.top&oid=621695
Discovery details:
R.A. 18h29m22.90s, Decl. -14°30'46.0" (J2000.0)
2018 June 29.5768 UT, 10.3 mag (unfiltered)
Discoverer: Yukio Sakurai (Mito, Japan)
2018 06 29.577 UT
Discovered by Y. Sakurai, Mito, Japan, on two frames using Nikon D7100 digital camera + 180-mm f/2.8 lens, who writes there is a variable star TSVSC1-TN-S300112300-126-67-2 at 21s.88 and 51".1. Nothing is visible at this location on a frame (limit mag.= 12.1) taken on 2018 June 23.632 UT.
2018 06 30.2646 UT
Photometry results were V=10.43 and Ic=9.35 with 0.61-m f/6.5 CDK astrograph + FLI PL09000 CCD, iTelescope.NET at Auberry, CA, USA. Position end figures were 22.93 and 43.9 in R.A.and Dec.
Seiichiro Kiyota (Japan)
2018 06 30.528 UT
Mag. V= 10.57, R= 9.69, I= 8.84, position end figures 22s.96, 44".0 observed by K. Yoshimoto, Yamaguchi-ken, Japan, using 0.50-m f/6.8 reflector + CCD + focal reducer, Siding Spring, remotely. An image at
http://orange.zero.jp/k-yoshimoto/TCP-J18292290-1430460_0630.jpg
2018 06 30.5960 UT
Another photometry results were B=12.16, V=10.98, Rc=10.37 and Ic=9.83 with 0.43-m f/6.8 CDK astrograph + FLI PL4710 CCD at iTelescope.NET, SSO, NSW, Australia, I took low resolution spectra but I can detected no significant feature (at leat, it is not late type star like Mira variables).
Seichiro Kiyota (Japan)
2018 06 30.67 UT
A progenitor candidate is the Pan-STARRS1 source PSO J182922.940-143044.155 (position end figures 22.935s, 44.19"; i= 20.26 mag). Likely nova eruption with amplitude of more than 11 magnitudes (V band). --- Patrick Schmeer (Saarbrücken-Bischmisheim, Germany)
http://www.cbat.eps.harvard.edu/unconf/followups/J18292290-1430460.html
The likely nova is located 4 arc minutes NE of gamma Scuti.
*** Spectroscopy and multiband photometry are urgently required. ***
Clear skies,
Patrick
I'm now on this target since the beginning of the night with an echelle spectrograph (eShel from Shelyak Instrument R=11000) and a RC400 Astrosib (16 inchs telescope) and ATIK 460ex CCD.
The first raw spectrum show a large P Cyg profil on H alpha and others lines
Process of the final spectrum is in progress...
Thank you for the alert, Patrick
First spectrum obtained by Umberto Sollecchia in ARAS database
http://www.astrosurf.com/aras/Aras_DataBase/Novae/2018_NovaSct2018.htm
Clearly a nova near maximum luminosity
François Teyssier
And quicky process, the graph of H Alpha velocity
And Sodium lines
I try to do more exposure to improve the SNR, (flux is very weak with an eShel)
Olivier Garde's and Umberto Sollecchia's results written up here:
"First spectroscopic observations of TCP J18292290-1430460 (Nova Sct 2018): an optically thick classical nova"
http://www.astronomerstelegram.org/?read=11802
Thank you for the alert Patrick!
I did a visual estimation July 1st @ 1:40 UTC : +10.8 using my Mewlon 250CRS. No color detected because of the close Moon light.
Michel
My pleasure, François and Michel.
Here is a light curve done last night over 3:15 hours. This is a relative measurement. Olivier Garde advised me to seek for other light curves. So, I am posting just in case it may be interesting for anyone here.
My last visual estimation : July 2nd @ 2:17 UTC : +11.2
Michel
I took a series of observations June 30th local, July 1rst UT, uploaded to AAVSO , it's getting brighter..
AAVSO Alert Notice 638 announces and reports on Nova Sct 2018 = TCP J18292290-1430460. Please see notice for details and observing instructions.
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ