AAVSO Alert Notice 450Dr. Paula Szkody (University of Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2 (SDSS0804+51) in support of Hubble Space Telescope ultraviolet spectroscopic observations scheduled for 20:52:40-23:32:35 2011 November 3 UT (the night of … Read the rest of this article
Ernst Pollmann, Chairman of the VdS-Spectroscopy-Group in Germany and an ative spectroscopist, has requested the assistance of AAVSO photoelectric photometry (PEP) observers in a campaign to observe the S Doradus variable P Cygni through the 2011 observing season.
PEP data are needed for correlation with spectra of … Read the rest of this article
Light pollution is the bane of amateur astronomers everywhere. The Globe at Night program is an international citizen-science campaign to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations online to a world map. So here’s your opportunity to give them your help!
It’s pretty … Read the rest of this article
|
|
A partial solar … Read the rest of this article
Rescheduled request for observations of V455 AND in support of HST observations
October 5, 2010
As originally announced in AAVSO Alert Notice 423, Dr. Paula Szkody (U. Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic … Read the rest of this article
Dr. Colin Aspin (U. Hawai’i) has requested the help of AAVSO observers in performing long-term photometric monitoring of the two new young stellar objects (YSOs) in Cygnus, HBC 722 and VSX J205126.1+440523 (see AAVSO Special Notice #216).
Dr. Aspin requests calibrated, transformed BVRI photometry to precisely monitor … Read the rest of this article
A new comet is swinging through the inner solar system, and it is brightening rapidly as it approaches Earth for a 100 million mile close encounter in mid-June.
Comet McNaught (C/2009 R1) has a vivid green head and a long wispy tail that looks great through small telescopes.
By the end of the month it could be visible to the … Read the rest of this article
Kunegunda Belle, Don Hoard and Steve Howell are observing two cataclysmic variables with Spitzer during the next couple of weeks. They request ground-based light curves spanning the observation intervals so that they can identify the state each variable is in during the Spitzer visits.
1. EX … Read the rest of this article
AAVSO Alert 387:Event: Nova in Aquila
Discovered by: K. Itagaki (Yamagata, Japan)
Discovery date: 2008 September 22.5 UTC (JD 2454732.0)
Discovery magnitude: m = 14.0 (unfiltered)
Position: RA = 19h 06m 28.58s , Dec = +07d 06m 44.3s (from Itagaki)
Charts: Finter charts for this object may be plotted using VSP:… 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) |
|
