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Observations of the planetary nebulae NGC 7027 and NGC 7293 at the Kottamia Observatory

✍ Scribed by A. S. Assad; S. M. Hassan; G. S. Kromov


Publisher
Springer
Year
1978
Tongue
English
Weight
272 KB
Volume
14
Category
Article
ISSN
0571-7256

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Four minima have been stated and can be interpreted in terms of occulting dust clouds, probably representing dense condensations of the planetary nebula. We derived R = Av1EB-v = 4.0. Photoelektrische UBV-Beobachtungen des Zentralsterns des Planetarischen Nebels NGC 2346, gemessen in 60 Nachten zwis