Planetary Nebula BV 5-1

Böhm-Vitense 5-1
Böhm-Vitense 5-1: Planetary Nebula in Cassiopeia; 500 mm Cassegrain 3625 mm f/7.2; SBIG STL11K; 200-110-110-110 min LRGB; Bernese Highlands; © 2015 Radek Chromik [32]


In 1956 the German-American astronomer Erika Böhm-Vitense discovered three new planetary nebulae during a study of extragalactic nebulae at Lick Observatory. This nebula here was the first listed in table V of her publication, hence the designations Böhm Vitense 5-1, BV 5-1, or also sometimes just BV 1. The other ones on this list were BV 5-2 and BV 5-3. [548]

Physical Properties

BV 5-1 is an odd looking object, not at all looking like an ordinary planetary nebula. It shows a knotty structure along a central bar, the major axis, which appears to be optical thick. This molecular ring is seen edge-on. The nebula is highly enriched in nitrogen and helium, powered by an exceeingly hot star with a temperature between 170'000 K and 236'000 K. Distance is estimated to 2100 pc. It is a relatively evolved nebula with a kinematic age of approximately 24'000 years. [549, 550] According to SkySafari 6 the visual magnitude is 15.69 mag. [149]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
Designations PN G119.3+00.3: BV 5-1, PK 119+00.1, ARO 199
Right Ascension (J2000.0) 00h 19m 59s
Declination (J2000.0) +62° 59' 01"
Dimensions 18." : (optical)
Radial Velocity -72.2 ± 4.2 km/s
Expansion Velocity 11.0 (N-II) km/s
C-Star Magnitude V: 22.3
Discoverer BOHM-VITENSE 1956

Finder Chart

The planetary nebula Böhm-Vitense 5-1 can be found in the constellation Cassiopeia. The object is circumpolar, but from July to January it is highest in the sky and best for observing.

Finder Chart Planetary Nebula BV 5-1
Planetary Nebula BV 5-1 in constellation Cassiopeia. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 15°