Skip to main content


Alert Notice 530: Nova Aquilae 2015 = ASASSN 15-qd = PNV J19215012+1509248 [V1831 Aql]

October 8, 2015

Event: Nova Aquilae 2015 = ASASSN 15-qd = PNV J19215012+1509248  [V1831 Aql]

Independent discovery by:  
 - Koichi Itagaki (Teppo-cho, Yamagata, Japan), reported by S. Nakano (Sumoto, Japan) (via CBET 4147)
 - All-Sky Automated Survey for Supernovae (ASAS-SN), reported by B. J. Shappee (Hubble Fellow, Carnegie Observatories) et al.

Alert Notice 520: X-ray nova and LMXB V404 Cyg in rare outburst

Campaign extended until further notice: As V404 Cyg's behavior following outbursts is clearly unpredictable, AAVSO observers are asked to continue obtaining multicolor photometry as well as visual observations. - April 2017

June 18, 2015: V404 Cyg, an X-ray nova and a low mass X-ray binary (LMXB) with black hole component, is undergoing its first reported X-ray and optical outburst since 1989. Large scale, rapid variations are being reported in wavelengths from X-ray to radio by professional and amateur astronomers worldwide.

Alert Notice 519: Nova Sgr 2015 No. 2 fading as dust production rises [V5668 Sgr]

June 15, 2015: Nova Sgr 2015 No. 2 (V5668 Sgr, PNV J18365700-2855420; see AAVSO Alert Notice 512) is undergoing a significant fading visually as its infrared excess increases, indicating that substantial dust production is underway.

Alert Notice 516: Nova Oph 2015 = PNV J17291350-1846120 [V2944 Oph]

April 2, 2015

Event: Nova Oph 2015 = PNV J17291350-1846120  [V2944 Oph]

Discovered by: Yukio Sakurai, Ibaraki-ken, Japan

Discovery magnitude: 12.2 unfiltered, using 180-mm f/2.8 lens

Discovery date: 2015 March 29.766 UT

Coordinates:  R.A. 17 29 13.58   Dec. -18 46 11.7  (2000.0)

Special Notice #399: GK Per in outburst

March 12, 2015: The old nova GK Per (N Per 1901), which has dwarf nova outbursts, is going into outburst, according to observations submitted to the AAVSO International Database:

Alert Notice 510: Observations of the symbiotic nova ASAS J174600-2321.3

March 5, 2015: The AAVSO is requesting observations of the symbiotic nova candidate ASAS J174600-2321.3 during the predicted upcoming eclipse of this system. Observers are asked to begin observing immediately (2015 March 5), and continue observations through the end of July 2015.  Both visual and instrumental observations are encouraged; the object was at V=12.28 on 2015 February 6.764 (OCN; S.

Alert Notice 509: Nova Sagittarii 2015 = PNV J18142514-2554343 [V5667 Sgr]

February 18, 2015

Event: Nova Sagittarii 2015 = PNV J18142514-2554343  [V5667 Sgr]

Discovered independently by:
- Hideo Nishimura (Shizuoka-ken, Japan)
- Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)

Discovery magnitude:
- Nishimura: DSLR magnitude 11.2, using 200-mm f/3.2 lens + digital camera
- Nishiyama and Kabashima: unfiltered CCD magnitude 10.9, using a 105-mm f/4 camera lens (+SBIG STL6303E camera)

Alert Notice 508: Nova Scorpii 2015 == PNV J17032620-3504140 [V1535 Sco]

February 17, 2015

Event: Nova Scorpii 2015 = PNV J17032620-3504140  [V1535 Sco]

Discovered by: Tadashi Kojima, Gunma-ken, Japan

Discovery magnitude: unfiltered DSLR magnitude 8.1, using a 150-mm f/2.8 lens and digital camera

Discovery date: 2015 February 11.837 UT

Coordinates: RA: 17 03 26.18 , Decl: -35 04 17.6

Special Notice #398: Bright Transient in Sgr (PNV J18142514-2554343) [V5667 Sgr]

February 13, 20115:  Patrick Schmeer (SPK, Bischmisheim, Germany) reports the announcement on the CBAT Transient Object Confirmation Page (TOCP) of the discovery of a bright transient in Sgr [V5667 Sgr] on 2015 February 12.852 at an unfiltered magnitude of 10.9 by K. Nishiyama, using a 105-mm f/4 camera lens with an SBIG STL6303E CCD camera.  Nishiyama notes nothing is present on a previous image from 2015 February 02.887.  The transient has been independently confirmed with two pre-discovery images: by H.

Special Notice #11: Possible New Object in Ophiuchi [V2576 Oph]

April 7, 2006: P. Williams (Heathcote, NSW, Australia) reports through AVSON on the discovery of a new object in Ophiuchi. It has been visually confirmed by Maciej Reszelski (Szamotuly, Poland). Photographic confirmation by B. Liller (Vina Del Mar, Chile) on panchromatic film with an orange filter has been reported through CV-Net.

Current reported observations:

April 06.311 >12 B. Liller (LIW) Photographic w/Orange Filter

April 06.565 10.5 P. Williams (WPX) Visual

April 06.590 10.4 P. Williams (WPX) Visual


AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484