Planetary Nebula Vyssotsky 2-2

Vy 2-2
Vy 2-2: Image taken by Hubble Space Telescope on 29 November 1996, slightly processed with PixInsight. North is up. [177]


This is one of three planetary nebulae discovered in November 1945 by the Russian-American astronomer Alexander N. Vyssotsky during a survey of camera plates taken at the Leander McCormick Observatory at the University of Virginia, USA. [615] As this PN is the second listed object in Vyssotsky's second publication, it is referred to as Vy 2-2.

Physical Properties

Vy 2-2 is a proto-planetary or very young planetary nebula. The kinematic age, derived from the angular expansion, is estimated to 213 ± 26 yr. The PN shows OH maser emission lines and has an angular diameter of only 0.4 arcsec. The central star may be of type Of. [616, 617] The distance is extimated to 4.394 kpc. Apparent magnitudes of the nebula through different filters: B 14.02, V 12.65, R 13.38, J 10.844, H 10.62, K 9.69. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
DesignationsPN G045.4-02.7: Vy 2- 2, PK 45-02.1, ARO 151, M 1-70, VV 230, VV' 497
Right Ascension (J2000.0)19h 24m 22s
Declination (J2000.0)+09° 53' 55"
Dimensions 14." (optical), 0.5" (radio)
Radial Velocity-71.4 km/s ± 3.9 km/s
Expansion Velocity 17.5 km/s (O-III), 25.0 km/s (N-II)
C-Star DesignationsAG82 367
C-Star Magnitude15.51 mag (B filter), 14.60 mag (V filter)
DiscovererVYSSOTSKY 1945

Finder Chart

The planetary nebula Vy 2-2 is located in the northern part of constellation Aquila. You'll find it on the longer, eastern edge of a conspicuous triangle of 6 to 8 mag stars, where the southernmost corner is formed by the double star BD +09°4085 (components HD 182219 and HD 182220, separated by 8.7"). The best time for observation is in the months from July to September.

Finder Chart Planetary Nebula Vyssotsky 2-2
Planetary Nebula Vyssotsky 2-2 in constellation Aquila. 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]

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