Four newly identified planetary nebulae in the Palomar plate 18 H 48 M + 12 deg

Details Four newly identified planetary nebulae in the Palomar plate 18 H 48 M + 12 deg Four newly identified planetary nebulae in the Palomar plate 18 H 48 M + 12 deg

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26as...86..503c&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 86, no. 3, Dec. 1990, p. 503-511.

Astronomy and Astrophysics

Astronomy

10

Planetary Nebulae, Sky Surveys (Astronomy), Stellar Evolution, Charge Coupled Devices, Infrared Photometry, Interstellar Extinction, Photographic Plates

Scientific paper

The application of the red-infrared comparison suggested by Sabbadin (1986) to the Palomar plate 18 h 48 m + 12 deg allowed to identify four hitherto unknown planetary nebulae, almost doubling the number of such objects known in this field. Three of these new planetary nebulae are compact, distant, and highly obscured objects; by contrast, the fourth (known as SH2-78) appears extended and weak and represents a planetary nebulae in a very late evolutionary phase.

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