Welcome to the AAVSO Variable Star Plotter.

New Users: Click here for a one-page guide to the VSP (PDF).

	Location* Name or RA Dec Delimited by spaces or colons; sexigesimal or decimal degrees Title Title to be displayed top center of chart Comment Comment to be displayed beneath chart star field Plot a chart of this scale: Choose A AR B BR C CR D DR E ER F FR G GR Use this to quickly plot a chart with same dimensions and scale as existing AAVSO charts. FOV* Field of view size, expressed in arc minutes (0-900, 0-60 for DSS) Resolution* Print resolution of image, expressed in dots per inch (75-300) Mag. Limit* Limiting magnitude for stars (5-25; ignored if Use DSS Image checked) North Up Down East Right Left Image Use DSS image Query Digitized Sky Survey and render image on chart Field Photometry Do not plot a chart, just give me a table of photometry Other Variables Do not mark additional variables in the field. Mark GCVS variables in the field of view Mark all variables in the field of view Chart ID The Chart ID of a previously created chart (will override all other settings) (what is this?) * required

• Click here for a one-page guide to the VSP (PDF).
• Report a sequence or chart error using our Chart Error Tracking Tool (must be logged into Blue/Gold to work).
• For info on the new Chart ID numbers, read this and this post to AAVSO-Discussion.

• Some comparison star sequences will be different than what are on previous AAVSO charts. Click here for an explanation of these changes.
• Report software problems here.
• Machine-generated charts may contain spurious objects around bright stars, where diffraction spikes and halo's around these stars were interpreted by plate scanners as real sources. Please use the default "Use DSS image" as a check when plotting these fields.
• More info:
  • VSP & VSD PPT presentation by Vance Petriew and Mike Koppelman at the 96th AAVSO Spring Meeting in June, 2007.
  • Video and PDFs from a talk on the subject at the 95th AAVSO Spring Meeting in April, 2006
  • "Charts and Comparison Stars: A Road Map to the Future" in JAAVSO 33,1 (2005).
  • Funding for the development of the Automated Chart Plotter was provided by the Curry Foundation. Development was by Clockwork Active Media Systems with contributions from M. Koppelman, A. Price and C. Watson.