Alert Notice 627: Nova in Canis Major - N CMa 2018 = TCP J07134590-2112330

March 26, 2018

Event: Nova in Canis Major - Nova CMa 2018 = TCP J07134590-2112330

Discovered by: Yuji Nakamura (Kameyama, Mie, Japan) (reported to CBAT by M. Soma, National Astronomical Observatory of Japan)

Discovery magnitude: CCD magnitude 12.0, using a 10-cm f/3 reflector

Discovery date: 2018 March 24.496 UT

Coordinates (2000.0): R.A. 07 13 45.84  Decl. -21 12 31.3  (from VSX)

Spectra: Spectroscopy indicating that TCP J07134590-2112330 is a young classical nova was obtained by J. Strader et al. (ATel #11475) with the 4-m Southern Astrophysical Research Telescope at Cerro Pachon, Chile, on 2018 Mar. 25.1 UT.  

Observing recommendations: Observations of all types (visual, CCD, DSLR, PEP, spectroscopy) and multiple bands as instrumentation permits are strongly encouraged as the nova evolves.

Observations reported to the AAVSO:
2018 March 17.511 UT, <15.4 (Y. Nakamura, Kameyama, Mie, Japan; CBET 4499);
23.153, 15.5 V (ASAS-SN Sky Patrol, as reported by Schmeer; contaminated by the light of a 15th-magnitude star 9" away; CBET 4499);
24.83056, 12.8 (P. Schmeer, Saarbruecken-Bischmisheim, Germany);
25.09593, 12.116 V +/-0.038 (B. Harris, New Smyrna Beach, FL);
25.09677, 13.099 B +/-0.021 (Harris);
25.143, 12.2 V (ASAS-SN Sky Patrol, as reported by Schmeer; CBET 4499);
25.411, 12.14 V (S. Kiyota, Kamagaya, Japan; CBET 4499);
25.411, 11.54 Rc (Kiyota; CBET 4499);
25.411, 11.01 Ic (Kiyota; CBET 4499);
26.04027, 10.820 I +/-0.013 (B. Vietje, South Ryegate, VT);
26.04076, 11.372 R +/-0.010 (Vietje);
26.04142, 12.735 B +/-0.010 (Vietje);
26.04306, 11.9 (L. Shotter, Uniontown, PA);
26.05426, 11.964 V +/-0.008 (Vietje);
26.15483, 11.8965 V +/-0.0092 (S. Shadick, Saskatoon, SK, Canada);
26.13567, 10.7542 I +/-0.0046 (Shadick);

Charts: Charts with a comparison star sequence for N CMa 2018 may be created using the AAVSO Variable Star Plotter (VSP).

Submit observations: Please submit observations to the AAVSO International Database using the name N CMA 2018. Once a GCVS name is announced in an IAU Circular or CBET, please use that name.

AAVSO Forums: N CMa 2018 is the topic of the AAVSO Time Sensitive Alerts forum thread and the AAVSO Novae forum thread

a. Designated TCP J07134590-2112330 when posted to the IAU Central Bureau for Astronomical Telegrams Transient Object Confirmation Page (TOCP). Unless otherwise noted and except for observations reported to the AAVSO, the information in this Alert Notice is taken from IAU CBET 4499.
b. P. Schmeer (Saarbruecken-Bischmisheim, Germany) writes that no previous outbursts or eruptions were recorded by the ASAS-SN Sky Patrol in Feb. 2012 and since Dec. 2014, and he adds that there is a faint (magnitude g = 21.6) Pan-STARRS1 source with position end figures 45.84s, 31.3".  

c. J. Strader et al. (ATel #11475) report that they believe that the nova is identical to the Pan-STARRS1 object noted by Schmeer (Note b).

d. Position end units
- Y. Nakamura (2018 Mar. 24.496 UT, discovery): 45.9s, 33"

Congratulations to Yuji Nakamura on his latest discovery!

This AAVSO Alert Notice was compiled by Elizabeth O. Waagen.

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