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Welcome to AAVSOnet!

The AAVSO has created the AAVSOnet network of remote, robotically controlled, and automatically queued telescopes for the use of its members. Several telescopes, located worldwide, are currently active and taking data right now.

The telescopes are all 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. Time on AAVSOnet telescopes 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, 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.


User's Guide

User's guide coming soon.


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


Articles, Blogs and News About AAVSOnet


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

Bareket Observatory
Bright Star Monitor (BSM) Stations Cerro Tololo International Observatory (CTIO)
B35 – Bareket 35cm
Commissioning Phase
BSM AR (Argentina)
Commissioning Phase
Fully Operational
  BSM AU (Australia) 
Fully Operational
  BSM Berry (Australia)
Under Construction
  BSM Hamren (Hawaii)
Commissioning Phase
  BSM HQ (Massachusetts) Commissioning Phase  
  BSM NM (New Mexico)
Fully Operational
Cohen/Menke Observatory (CMO)
New Hampshire
Dark Ridge Observatory (DRO)
New Mexico
Hawkins Pond Observatory (HPO)
New Hampshire
CM30- Cohen/Menke 30cm
Pending Construction
Fully Operational
HP80 – Motta 0.80m Telescope
  DR61- Morgan 0.61m Telescope
Under Construction
Lowell Observatory
Mount John University Observatory (MJUO)
New Zealand
New Mexico State University (NMSU)
New Mexico
W28- Wright 28cm Telescope
OC61- Optical Craftsman 0.61m Telescope
Fully Operational
TMO61- Tortugas Mountain Observatory 0.61m Telescope
Fully Operational
Sonoita Research Observatory (SRO)
Sutter Creek Observatory
SRO50- SRO 50cm Telescope
Fully Operational
COKER30- Coker 30cm Telescope
Fully Operational


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