Spectra of Planetary Nebulae

Nebula	PK048+04.1	RA (J2000)	19 03 46.8
Constellation	Aquila	Dec	+16 26 16.9
Size (arcsec)	stellar	Other names	PK 048+04.1
Mag (V)	11.7		V1413 Aql
Surface Brightness (mag/arcsec2)	n/a		K4-12

HAG 24" RC, SBIG STF-8300M, Lhires III, 300 gr/mm, 1800 sec, 2021-05-31@23:34

Symbiotic Star. Hydrogen emission and helium at 5876Å

A white dwarf or neutron star with a red giant companion will accrete material from the companion onto its surface and if this interaction can be detected spectroscopically it is termed a Symbiotic Star. In the majority of such systems known, nuclear reactions take place in the accreted material at the surface the white dwarf and the resulting high temperature (100,000 K) allows ionization of a large fraction of the cool giant's wind producing an emission spectrum.

DSS2 image, 10 arcmin square

156 / 209 (pg 95)