Central Bureau for Astronomical Telegrams
IAUC 9216: V1312 Sco = N Sco 2011
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Circular No. 9216
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
New postal address: Hoffman Lab 209; Harvard University;
20 Oxford St.; Cambridge, MA 02138; U.S.A.
CBATIAU@EPS.HARVARD.EDU ISSN 0081-0304
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network
V1312 SCORPII = NOVA SCORPII 2011
As first reported on CBET 2735, John Seach (Chatsworth Island,
NSW, Australia) reported his discovery of a possible nova (mag 9.5)
on three CCD images (limiting mag 11.0) taken on June 1.40 UT with
a digital SLR camera (+ 50-mm-f.l. f/1.2 lens + orange filter).
Seach found the object to be located at R.A. = 16h55m11s, Decl. =
-38o38'12" (equinox 2000.0), and the designation PNV
J16551100-3838120 was given to this object when posted on the
Central Bureau's TOCP webpage. Nothing is visible at this position
on Seach's images taken on May 30 UT (limiting mag 11.0) or on the
ESO Online Digitized Sky Survey (no dates, bandpasses, or limiting
magnitudes provided). A low-dispersion spectrogram obtained by A.
Arai, T. Kajikawa, and M. Nagashima, Kyoto Sangyo University, on
June 2.68 with the 1.3-m Araki telescope (+ LOSA/F2) under a hazy
sky shows a broad H_alpha (FWZI about 4600 km/s) with an asymmetric
profile and O I (777.4 nm) on a highly-reddened continuum; no
visible He or Fe II lines exist in the spectrum. These features
suggest that the object is a classical nova in outburst with high
interstellar reddening (further details appear on CBET 2735). N.
Samus relates that the permanent GCVS designation V1312 Sco has
been given to this nova.
E. O. Waagen, AAVSO, reports that a low-dispersion spectrum of
N Sco 2011 taken by J. L. Menke (Barnesville, MD, U.S.A.) on June
2.182 UT shows H-alpha emission; the spectrum was obtained using an
N18 DSS7 ST402 camera (ten exposures, each 120 sec, calibrated, and
aligned), and the reference star was nearby SAO 208167 (type B7iii).
Additional magnitudes for V1312 Sco, reported in part by
Waagen (visual unless noted otherwise, some using remote telescopes):
June 2.33 UT, V = 10.4 (A. Oksanen and C. Harlingten; 50-cm Dall-
Kirkham telescope; position end figures 09s.46, 04".5; V-band
images show a constant fading of 0.15 mag/hr between June 2.333 and
2.375); 2.4, 9.4 (E. Guido and G. Sostero; 32-cm f/6.3 telescope +
CCD; position end figures 09s.46, 04".5; USNO-B1.0 catalogue
reference stars); 2.564, 11.2 (P. Williams, Heathcote, NSW,
Australia); 2.975, 11.1 (A. Amorim, Florianopolis, Brazil); 3.148,
10.4 (R. Tyson, Freeport, NY, U.S.A.); 3.376, 10.4 (S. Aguirre,
Hermosillo, Mexico); 3.502, 11.0 (H. Matsuyama, Kanimbla,
Queensland, Australia); 4.205, 10.5 (C. Montalvo, Lima, Peru);
4.244, V = 11.13 (S. Dvorak, Clermont, FL, U.S.A.); 4.247, B =
12.61 (Dvorak); 4.420, 11.2 (S. Baroni, Milan, Italy); 4.468, 11.7
(Matsuyama); 5.027, 11.7 (Amorim); 5.034, 11.6 (G. Vargas Beltran,
Cochabamba, Bolivia); 5.451, 11.3 (S. Foglia, Milan, Italy); 6.463,
11.7 (Matsuyama); 7.322, 11.5 (Baroni); 7.438, 11.8 (Matsuyama).
(C) Copyright 2011 CBAT
2011 June 8 (9216) Daniel W. E. Green
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