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PNV J17184504-2454221: spectroscopically confirmed Galactic nova (9.4 mag) in Ophiuchus

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PNV J17184504-2454221: spectroscopically confirmed Galactic nova (9.4 mag) in Ophiuchus

PNV J17184504-2454221 (N:)

RA 17h18m45.04s, DEC -24°54'22.1" (J2000.0)
2017 Nov. 11.3736 UT, 9.4 mag (CCD, unfiltered)
Discoverer: Shizuo Kaneko, Kakegawa, Shizuoka-ken, Japan

"2017 11 11.374 UT
Discovered by S. Kaneko, Kakegawa, Shizuoka-ken, Japan, with on 4-s exposure on four frames using Canon 6D digital camera + f/3.2 200-mm lens under the limiting mag = 13.2, who gives mag= 9.4 on Nov. 375 UT and
writes that nothing is visible at this location on a frame taken on November 4 UT."

Follow-up reports:

Three Gaia DR1 sources (all of 20 mag) are within 6" of the reported position of this transient.

Spectroscopy and precise astrometry are urgently required.

Clear skies,

SPK's picture
Confirmation and CCD image by Toshihide Noguchi

2017 11 12.356 UT
Mag.= 9.8, position end figures 45s.01, 21".8 observed by T. Noguchi, Chiba-ken, Japan, using 0.23-m f/10 Schmidt Cassegrain + unfiltered CCD. An image at

hambsch's picture
New transient

Observed the star in BVI filters last night remotely from Chile. Unfortunately already at airmass 3 and very red stars in the field (maybe due to extinction).Could not submit to the AAVSO database as the star is not yet included. Mags in B about 10.5 in V about 9.22 and I about 7.27. Uncertainties are 0.03 in B and 0.015 in V and I mainly due to comp stars.


New transient sequende

There is a new sequence for the transient.  For the time being you have to access it using the coordinates.

Unfortunately not much in close.

Jim Jones

SPK's picture
Photometry by Seiichiro Kiyota

2017 11 12.3465 UT
Photometry results were V=9.39, Rc=8.86 and Ic=8.02 with 0.25m SCT + Apogee Alta F47 CCD at Kamagaya, Japan. This object was very low in the sky at my observation site and comparison star was very red in color. Thus this photometry results might have large systematic error. Seiichiro Kiyota

SPK's picture
Spectroscopic confirmation as a Galactic nova

Spectroscopic Confirmation of PNV J17184504-2454221 as a Galactic Nova in Ophiuchus (ATel #10959):

"The spectrum shows broad Balmer emission lines with FWHM of 2500 km/s. Beyond the Balmer lines, the most prominent emission lines are Fe II, implying that it is an Fe II nova."

SPK's picture
PNV J17184504-2454221 in VSX
weo's picture
Alert Notice 605 on PNV J17184504-2454221

AAVSO Alert Notice 605 announces and reports on the galactic nova in Oph, PNV J17184504-2454221. Please see the notice for details and observing instructions, including a request from Dr. Koji Mukai, who has target-of-opportunity observations planned with the Fermi Gamma-ray Space Telescope.

Many thanks, and Good observing,

Elizabeth Waagen, AAVSO HQ

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