Alert Notice - Observing Campaign #870: Unveiling CI Hyi as a symbiotic system
AAVSO Alert Notice - Observing Campaign #870: Unveiling CI Hyi as a symbiotic system
September 10, 2024
semiregular variable
AAVSO Bulletin 81 for 2018 published
AAVSO Bulletin 81: Predicted Dates of Maxima and Minima of Long Period Variables for 2018 has been published. This annual publication covers the period January 2018 - February 2019 and gives predicted extrema dates for 381 Long Period Variables in the AAVSO's Legacy LPV program.
Alert Notice 403: Request for observations of V2105 Oph in support of HST observations
August 30, 2009
Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable V2105 Oph beginning immediately. These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope on Wednesday, September 2, 2009. Observations are requested to continue through Sunday, September 6, 2009.
Alert Notice 405: Request for observations of NSV 99 (khi Peg) in support of HST observations
October 2, 2009
Dr. Brian Espey (Trinity College, Dublin, Ireland) has requested photoelectric photometry and bright star CCD photometry of the semiregular variable NSV 99 (= khi Peg) beginning immediately. These observations are in support of ultraviolet spectroscopy to be obtained with the Hubble Space Telescope in late October and late November 2009. Observations are requested to continue through the end of November 2009.
AAVSO Bulletin 73 for 2010 - Stars in Need of Observations
STARS IN NEED OF OBSERVATIONS
in
AAVSO BULLETIN 73: Predicted Maxima and Minima of Long Period Variables for 2010
The stars listed below need additional observations. Please be aware that many of these
stars are difficult to observe, and should be observed only by experienced observers.
Please note that the symbol % after a star name indicates the star has fair to excellent
CCDV or multicolor photometry but still needs visual observations.AAVSO Bulletin 73 for 2010 - How to Use the Bulletin
How to Use Bulletin 73
IMPORTANT NOTICE:
Bulletin 73 was NOT prepared in the same way as in the past. Please be sure to READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters if you have questions.
AAVSO Bulletin 73 for 2010 - Introduction
Introduction to Bulletin 73
AAVSO Bulletin 73 for 2010 - Note to Users
Note to Users of 2010 Bulletin
AAVSO Bulletin coordinates
AAVSO Bulletin Stars with 2000.0 Coordinates Note: Stars are in Bulletin order. Coordinates are ICRS from Simbad. Designation Name R.A. 2000.0 Dec.
AAVSO Bulletin 73 for 2010 Feb11
IMPORTANT NOTICE: Bulletin 73 was NOT prepared in the same way as in the past. READ THE INTRODUCTION before you use the Bulletin; contact AAVSO Headquarters for more precise dates for research. Predicted MAXIMA of long period variables for February 2011 *0014+44 VX And 7.9-9.6 Feb 13? 0049+58 W Cas <8.8-11.8> Feb 5 0231+33 R Tri <6.2-11.7> Feb 17 *0419+16 VX Tau %@ 9.7-(15.0 Feb 22?