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
β¦ LIBER β¦
Study of the planetary nebula NGC 2438 I. Spectroscopy of the nebula and of some cluster stars
β Scribed by R. Pauls; L. Kohoutek
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 266 KB
- Volume
- 317
- Category
- Article
- ISSN
- 0004-6337
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## Abstract In this work we present detailed photometric results of the trapezium like galactic nearby OB clusters NGC 1502 and NGC 2169 carried out at the University Observatory Jena. We determined absolute __BVRI__ magnitudes of the mostly resolved components using Landolt standard stars. This mu