Nova Cen 2025

[Francois Teyssier]

Nova Cen 2025 = V1935 Cen
R.A. = 14h37m21s.77, Decl. = -58d47'40".0 (equinox J2000.0)
Mag 6.2 on Sept. 22






Electronic Telegram No. 5611
Central Bureau for Astronomical Telegrams
Mailing address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


V1935 CENTAURI = NOVA CENTAURI 2025 = PNV J14372177-5847400
John Seach, Grafton, NSW, Australia, reports his discovery of a possible
nova (mag 6.2) on three unfiltered DSLR camera images obtained on Sept. 22.396
UT with a 40-mm-f.l. f/1.4 lens; the position was measured by Seach to be
R.A. = 14h37m21s.77, Decl. = -58d47'40".0 (equinox J2000.0), noting that no
known variables appear in the AAVSO VSX database. Seach adds that nothing
appears at this location on a red plate from the second Palomar Digital Sky
Survey, nor on three images obtained by Seach with the discovery
instrumentation on Sept. 21.366 (limiting mag 11.0). When Seach posted the
variable to the Central Bureau's TOCP webpage, it was automatically assigned
the provisional designation PNV J14372177-5847400.
E. Guido, M. Rocchetto, and L. Izzo obtained follow-up unfiltered CMOS
camera images of PNV J14372177-5847400 using a Spaceflux 0.35-m f/3 reflector
located near Moorook, Australia, on Sept. 22.55 UT that show the variable at
mag approximately 5.8 at position end figures 21s.71, 43".6 (Gaia DR2
catalogue reference stars). An animation showing a comparison between their
image and an archival Palomar Sky Survey plate from 1993 can be viewed via
website URL https://tinyurl.com/PNCEN2025. The closest star to this position
is Gaia DR3 5879255150966541696 (G-band magnitude 20.85), located
approximately 1".302 away.
A. Pearce, Nedlands, Western Australia, reports position end figures
21s.80, 41".2 for PNV J14372177-5847400, as measured from CCD images obtained
with the Perth Observatory 0.35-m f/6 RCOP reflector on Sept. 23.496 UT. The
variable is within 0".35 of Gaia DR3 catalogue star 5879255150965919104
(G magnitude 16.7). Noting that the images may be saturated, Pearce provides
the following photometric magnitudes: B = 7.43, V = 7.19, R = 6.13, I = 5.37.
He also estimated visual magnitude 6.8.
A. Amorim (Florianopolis, Brazil) estimated visual mag 6.2 on Sept.
22.912 UT for PNV J14372177-5847400, using 20x50 binoculars.
R. Kaufman, Bright, Victoria, Australia, reports that he obtained a
low-resolution optical spectrogram of PNV J14372177-5847400 on Sept. 23.383 UT
that shows strong, broad hydrogen-Balmer emissions, indicative of a classical
nova.
E. Kazarovets (Institute of Astronomy, Moscow) informs the Bureau that
the permanent GCVS designation V1935 Cen has been assigned to this nova.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.

(C) Copyright 2025 CBAT
2025 September 23 (CBET 5611) Daniel W. E. Green

[Francois Teyssier]

Spectrum obtained by Paul Luckas with an eShel R = 11000

The FHWM of H alpha is 6300 km/
Very fast nova.

novacen2025_echelle_2025-09-24.png (38.22 KiB) Viewed 56 times

Spectra: https://aras-database.github.io/databa ... n2025.html