AAVSO Alert Notice 503Current magnitude 12 -12.5.
Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) and colleagues have requested AAVSO observer assistance in their campaign on the symbiotic variable RT Cru. Weekly or more frequent monitoring beginning now is requested in support of upcoming Chandra observations still … Read the rest of this article
AAVSO Alert Notice 501Dr. Peter Garnavich (University of Notre Dame) and Dr. Paula Szkody (University of Washington) have requested the help of AAVSO observers in monitoring the cataclysmic variable SBS 1108+574 (= CSS 120422:111127+571239) in support of upcoming Hubble Space Telescope observations. The HST COS (Cosmic Origins Spectrograph) will be carrying out … Read the rest of this article
AAVSO Alert Notice 499On 2014 March 20 at approximately 02:06 a.m. EDT (06:06 UT), an occultation of Regulus (alf Leo, magnitude 1.4 V) by the magnitude-12.4 V asteroid (163) Erigone will take place. The occultation track includes Bermuda and northwest along a corridor stretching from the mid-Atlantic USA through Ontario, Canada. Unusual … Read the rest of this article
AAVSO Alert Notice 498Event: Nova Cephei 2014 = TCP J20542386+6017077
Discovered by: Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan)
Discovery magnitude: unfiltered CCD magnitude 11.7, using a 105-mm f/4 camera lens + SBIG STL6303E camera
Discovery date: 2014 Mar. 8.792 UT
Coordinates: R.A. 20 54 23.75 Dec. +60 … Read the rest of this article
AAVSO Alert Notice 4971. Event: Nova Sagittarii 2014 = PNV J18250860-2236024
Discovered by: Sigeru Furuyama (Tone-machi, Ibaraki-ken, Japan) and reported by S. Nakano (Sumoto, Japan)
Discovery magnitude: unfiltered CCD magnitude 8.7, using a 200-mm f/2.8 camera lens + BJ-42L camera
Discovery date: 2014 Jan. 26.857 UT
Coordinates: R.A. 18 25 … Read the rest of this article
AAVSO Alert Notice 494Darryl Sergison (University of Exeter) has requested AAVSO assistance with a campaign he is carrying out on five T Tauri stars. This study is the one for which AAVSO observers carried out a preliminary campaign last year (see Alert Notice 473 and Special Notice #306). The star list … Read the rest of this article
AAVSO Alert Notice 493Dr. Hans Moritz Guenther (Harvard-Smithsonian Center for Astrophysics) has requested nightly observations of the classical T Tauri star BP Tau in support of upcoming Chandra X-ray observations in his study of the accretion processes underway in this star.
Dr. Guenther writes: “… … Read the rest of this article
AAVSO Alert Notice 491Event: V556 Serpentis = Nova Ser 2013 = PNV J18090346-1112345
Discovered by: Koichi Itagaki (Teppo-cho, Yamagata, Japan), reported by S. Nakano (Sumoto, Japan)
Discovery magnitude: unfiltered CCD magnitude mag 12.3, using a 0.21-m reflector
Discovery date: 2013 Nov. 24.384 UT
Coordinates: R.A. 18 09 … Read the rest of this article
AAVSO Alert Notice 490Dr. William Herbst (Wesleyan University) and Rachel Pedersen (Bates College) have requested AAVSO assistance in monitoring the Orion variable T Ori in support of spectroscopy they will be obtaining during September 2013. AAVSO nightly coverage (visual or electronic, not time series) of this star is crucial throughout … Read the rest of this article
AAVSO Alert Notice 489Event: Nova Del 2013 = PNV J20233073+2046041
Discovered by: Koichi Itagaki (Teppo-cho, Yamagata, Japan), reported by S. Nakano (Sumoto, Japan)
Discovery Magnitude: unfiltered CCD magnitude mag 6.8 using a 0.18-m reflector
Discovery date: 2013 Aug. 14.584 UT
Coordinates: R.A. 20 23 30.73 Decl. +20 46 04.1 (2000.0)… Read the rest of this article
The Sun Now (Visible light)
|
The Sun Now (H-Alpha light)
|
|
Aurora Oval
(Northern Hemisphere) |
Aurora Oval
(Southern Hemisphere) |
|
