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Investigations of DDDM 1; The Fourth Halo Planetary Nebula

Published online by Cambridge University Press:  19 July 2016

A. Yu. Shchelkanova
A. Yu. Shchelkanova*
Affiliation:
Sternberg State University, Moscow, USSR

Abstract

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Spectral (λλ 4100 - 7300 A) and photoelectric observations of DDDM 1 (61 + 41°1; δ1950 = +38°48′) were made in 1985–86 on Crimean Station of Sternberg State Institute. Photographic absolute H3 flux is found to be F(Hβ) = (3.0±0.57) 10−12 erg cm−2 s−1, angular radius φ = 1″.0±0″.5. Interstellar reddening E(B-V) for the object is found to be less than 0″.02. Integrated flux from central star and gaseous nebula was measured in UBV-filters V = 14m.71, B-V = 0m.12, U-B = −0m.9.

Type
II. Nebular Properties
Information
Symposium - International Astronomical Union , Volume 131: Planetary Nebulae , 1989 , pp. 215
Copyright
Copyright © Kluwer 1989