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Welcome to AAVSOnet!

AAVSOnet is a network of remote, robotically controlled, and automatically queued telescopes for the use of its members.

The telescopes are automatically scheduled using ACP, with image acquisition and telescope control by MaxIm DL. Time on the telescopes is shared between AAVSO key projects (primarily surveys and field calibrations) and AAVSO member programs. AAVSOnet telescope time is awarded on a nominally competitive basis, although the systems may be used by members for any reasonable purpose if time is available.

To request time on these telescopes, you must be a current member of the AAVSO in good standing, or have the approval of the AAVSO Time Allocation Committee. To submit a proposal to use these telescopes, please complete the AAVSOnet Proposal Form. For a list of previous observing runs, click here.

The AAVSO is currently performing an all sky photometric survey of stars from ~10th-17th magnitude. APASS, the AAVSO All Sky Photometric Survey has pairs of astrographs operating in Chile and New Mexico.

We gratefully acknowledge the support of SBIG (furnishing cameras, filter wheel and spectrographs); Diffraction Limited (supplying copies of MaxIm DL); and DC3 Dreams (providing ACP and ACP Scheduler).  Without this kind of vendor support, AAVSOnet would not be a reality.  Many volunteers are involved in AAVSOnet activities, including each of the site managers (John Gross, Tom Smith, Bill Stein, Greg Bolt, Mike Linnolt, Peter Nelson and Bill Goff).  If you are interested in volunteering, let us know by emailing

Jump to Observatories and Telescopes

Submitting Proposals

To apply for time on any of the AAVSOnet telescopes you need to fill out a AAVSOnet Proposal Form describing the targets, methodology and science goals of your project.



VPhot, the AAVSO's fantastic photometric software hosted on the Amazon cloud. 


Articles, Blogs and News About AAVSOnet

Forums & Discussions

Visit the AAVSOnet Forum for discussing AAVSOnet topics, including technical support, announcements, status updates, and more...

Observatory and Telescope Pages



Status, Technical and Geographical Information

AAVSONet Telescopes

Bright Star Monitor (BSM) Stations
BSM S - Australia
BSM Berry - Australia
BSM Hamren - Hawaii
BSM HQ - Massachusetts
BSM NM - New Mexico

Sonoita Research Observatory (SRO) - Arizona
SRO50- SRO 50cm Telescope

Sutter Creek Observatory - California
COKER30- Coker 30cm Telescope

New Mexico State University (NMSU) - New Mexico
TMO61- Tortugas Mountain Observatory 0.61m Telescope

Mount John University Observatory (MJUO) - New Zealand
OC61- Optical Craftsman 0.61m Telescope


APASS-Specific Telescopes

Dark Ridge Observatory (DRO) - New Mexico

Cerro Tololo International Observatory (CTIO) - Chile

The AAVSO sees the AAVSONet robotic telescope network as an integral part of the modern offerings of the organization. We hope you enjoy them and are able to use them effectively in your research!


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