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observing aids

any content that aids in observing practices

2012 JD Calendar

The 2012 JD Calendar is now available.

Just go to the JD Calendar page and scroll down to the bottom where you will be able to view or download the new calendar.

Happy observing!

Charts and Sequences Update September 2011

The following stars (objects) have new or revised sequences as of September 29, 2011.

Please update your charts if you observe any of these objects.

 

CCD Views June 2001

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            THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS            
                 25 Birch Street, Cambridge, MA 02138 USA
                 Tel. 617-354-0484       Fax 617-354-0665
                          http://www.aavso.org
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                             C C D   V I E W S
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                           June, 2001  Vol 2 No 1

              

AAVSO Bulletin Generator

The following form will allow you to generate a customized copy of the AAVSO Bulletin suited to your needs.  You may select stars from a given constellation, range of Right Ascension and/or Declination, or simply type in a list of stars you would like returned.  You may also customize the page that's output by color-coding the months depending upon the brightness of the star, and also limit output to a single month.  Leaving all options blank will give you the complete list of stars in this issue of the Bulletin with no color added to the table.

AAVSO Bulletin 74 for 2011

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2011

2011 JD Calendar

The 2011 JD Calendar is now available.

SID Monitoring Group FAQ

When the ultraviolet rays from the Sun hit the Earths atmosphere the energy they possess work to knock electrons off of the atoms and molecules that the atmosphere is made up of. These free electrons make up a region of the atmosphere known as the Ionosphere. The region is strongest on the daytime side of the earth since it is dependant on the energy from the solar ultra violet rays.

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