AAVSO: American Association of Variable Star Observers

Proposal #230

Proposer (44277) David Maynard (david@davidmaynard.ca) obscode: MDAM
Assigned To(3663) Dirk Terrell
Date SubmittedOct. 18, 2021

Member Name: David Maynard
Observer Code: MDAM
RU Cam is a Cepheid Variable with a 22 day period and variability of 0.1 magnitude. AAVSO Journal 49 volume 1 included an article by John Percy that analyzed the pulsation cycle and concluded that the pulsation period for RU Cam has remained stable with a pulsation period of 21.75 using limited recent data. I propose to monitor RU Cam for a period of 70 days to cover 3 – 22 day cycles to see if the 0.1 magnitude variability can be measured and the 22 day period can be observed. I intend to submit the transformed time series data to the AAVSO International Database and present the process and results in a talk to my chapter of the Royal Astronomical Society of Canada to encourage more interest in the AAVSO
VSX Target Name: RU Cam
Sky Coordinates: 07 21 44.12 +69 40 14.7 (110.43383 +69.67075)
V Magnitude Range: VSX 8.1 – 9.79
Appropriate Comp Stars: Chart X27243TI includes 7 comp stars within a 1 degree field of views
Fliters Needed: B, V, R, I
Number of images in each filter: Your advice would be appreciated
Exposure Time Assistance here as well would be appreciated
Project Start Date: 1 November 2021
Project Finish Date: 9 Jan 2021

Target RA (H.HH) Dec (D.DD) Magnitude Telescope Observation Frequency Expiration Date Proprietary Term
RU Cam 7.362256 69.67075 9.79–8.1 BSM_NH2 1 April 30, 2022 No


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