The observations to the magnitude and color variation object 'bN' object in Perseus

Details The observations to the magnitude and color variation object 'bN' object in Perseus The observations to the magnitude and color variation object 'bN' object in Perseus

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981acasn..22..174y&link_type=abstract

Acta Astronomica Sinica, vol. 22, June 1981, p. 174-179.) In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

Astronomical Photography, Color Photography, Electrophotometry, Magnitude, Nebulae, Astronomical Observatories, Error Analysis, Luminous Intensity, Photographic Plates, Schmidt Telescopes

Scientific paper

The brightness and color of the nebulosity surrounding the bN object are determined. The nebula is found to be nonuniform, with the eastern and northern parts brighter than the western and southern parts, and is considered to be a reflection nebula due to its blue color. Magnitudes measured by a photoelectric photometer with a 25 arcsec diagram represent those of the central star, due to faintness of the nebulosity which contributes less than 0.01 m to the total brightness. The object is also observed by the Schmidt and Double Astrograph to investigate the related photographic effects of the Beijing observatory telescopes, and results are compared. The U magnitudes of the object on October 1, 1978 are also presented.

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