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


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]

DesignationsPN 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 km/s ± 4.2 km/s
Expansion Velocity 11.0 km/s (N-II)
C-Star Magnitude22.3 mag (V filter)
DiscovererBOHM-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.

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]

Visual Observation

Pending ...

More Objects Nearby (±15°)


149SkySafari 6 Pro, Simulation Curriculum;
160The STScI Digitized Sky Survey;
548«Extragalactic Nebulae Close to the Galactic Plane» Erika Böhm-Vitense; Publications of the Astronomical Society of the Pacific, Volume 68, Number 404, 1956; DOI:10.1086/126966
549«The Highly Enriched Planetary Nebula BV-1» Kaler, James B.; Chu, You-Hu; Jacoby, George H.; Astronomical Journal v.96, p.1407, October 1988; DOI:10.1086/114890; Bibcode:1988AJ.....96.1407K
550«A disrupted molecular ring in planetary nebula G119.3+00.3 (BV 5-1)» E. Josselin and R. Bachiller; A&A Volume 376, Number 2, September II 2001; DOI:10.1051/0004-6361:20010922