Planetary Nebula Vyssotsky 2-2
History
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]
| Designations | PN 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 Designations | AG82 367 |
| C-Star Magnitude | 15.51 mag (B filter), 14.60 mag (V filter) |
| Discoverer | VYSSOTSKY 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.
