AAVSO: American Association of Variable Star Observers

Proposal #233

Proposer (1750) Shawn Dvorak (sdvorak@cfl.rr.com) obscode: DKS
Assigned To(3663) Dirk Terrell
Date SubmittedNov. 8, 2021

The VY Scl-type star MV Lyr is undergoing its first low state in six years. BVRI observations during the low state and subsequent return to normal brightness would be useful to study the evolution of the disk as it redevelops. There switch between low and high states can occur quite rapidly (the current fading event saw a 1.5 mag drop in < 2 days), so nightly coverage would be useful until solar conjunction precludes observations. Given the faintness of the object (V ~ 17, B should be similar) one of the larger telescopes would be best suited.

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
MV Lyr 19.121192 44.01906 17.5–13.0 TMO61 1 May 12, 2022 No


(3663) Dirk Terrell — Nov. 8, 2021, 5:43 p.m.

Arne suggests TMO61 for this project since SRO and MPO are down.

(4726) Kenneth Menzies — Nov. 13, 2021, 10:22 p.m.

Committed to TMO61. Filters are SG, SR, SI.

Comments on this proposal are closed.