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The photometric period of 39 AY CetiA photometric period of 77.65 days is derived for 39 AY Ceti through a comparison of photoelectric photometry obtained in 1971 and 1972 with that obtained in the periods 1980-1981 and 1981-1982. JD 2444636.0 is an epoch of minimum light, and the full amplitude is found to have been as large as 0.18 mag in V. It is noted that the mean light level has dropped by almost 0.2 mag over the last decade. The present binary star is also noteworthy in light of the recently discovered white dwarf secondary component, and because radial velocity measurements indicate an eccentricity as large as 0.1 and an orbital period which, at 57.1 days, differs considerably from the photometric period presented.
Document ID
19830058521
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hopkins, J. L.
(Hopkins-Phoenix Observatory Phoenix, AZ, United States)
Krisciunas, K.
(Krisciunas Observatory San Jose, Ca, United States)
Landis, H. J.
(Landis Observatory Locust Grove, GA, United States)
Louth, H.
(Louth Observatory Sedro Woolley, WA, United States)
Olsen, E.H.
(Universitetets Astronomiske Observatorium Tollose, Denmark)
Renner, T.R.
(Scuppernong Observatory Dousman, WI, United States)
Stelzer, H. J.
(Stelzer Observatory River Forest, IL, United States)
Eaton, J. A.
(Louth Observatory Sedro Wooley, WA, United States)
Hall, D. S.
(Louth Observatory Sedro Wooley, WA, United States)
Henry, G. W.
(Louth Observatory Sedro Wooley, WA, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: Astrophysics and Space Science
Volume: 93
Issue: 2 Ju
ISSN: 0004-640X
Subject Category
Astronomy
Accession Number
83A39739
Funding Number(s)
CONTRACT_GRANT: NSG-7543
Distribution Limits
Public
Copyright
Other

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