Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sval...18..324k&link_type=abstract
Soviet Astronomy Letters, Vol. 18, p. 324; Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 18, no. 9, p. 802-806. In R
Astronomy and Astrophysics
Astronomy
1
Planetary Nebulae, Stellar Magnitude, Ubv Spectra, Astronomical Catalogs, Astronomical Photometry
Scientific paper
The mean integral UBV magnitudes of seven planetary nebulae (NGC 6572, IC 4997, NGC 6891, Hu 2-1, NGC 6543, NGC 6720, and IC 3568) are presented. UBV magnitudes are obtained on the basis of photoelectric observations of these objects during 1968-1988, which were generalized in catalogs compiled by Kostiakova (1990, 1991). Integral UBV magnitude variation limits for the entire observational period are estimated.
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