Planetary Nebula Jones 1 (PK 104-29.1)
History
The planetary nebula Jones 1 (Jn 1, PK 104-29.1, VV '578) was discovered in 1941 by the American astronomer Rebecca Jones on photo plates of the Harvard Observatory. Two years earlier, together with Richard M. Emberson, she discovered another planetary nebula: Jones-Emberson 1 (PK 164+31.1) in the constellation Lynx. [325]
The designation PK 104-29.1 comes from the two Czechoslovak astronomers Luboš Perek and Luboš Kohoutek, who in 1967 compiled a catalog of all the planetary nebulae of the Milky Way known at the time. The designation VV '578 goes back to the Russian astronomer Boris Vorontsov-Velyaminov, who studied and classified planetary nebulae in addition to cataloging galaxies. [145]
Physical Properties
Jones 1 is a large planetary nebula with an angular diameter of 320 arcseconds, but a faint with only 15 magnitudes. The central star is 16.8 magnitudes bright. Distance measurements range from 716 pc to 826 pc (around 2300 to 2700 light years). [145]
| Designations | PN G104.2-29.6: Jn 1, PK 104-29.1, ARO 195, VV' 578 |
| Right Ascension (J2000.0) | 23h 35m 54s |
| Declination (J2000.0) | 30° 28' 03" |
| Dimensions | 320." (optical) |
| Radial Velocity | -67.0 km/s ± km/s |
| Expansion Velocity | 15. km/s (O-III) |
| C-Star Designations | AG82 454 |
| C-Star Magnitude | 14.47 mag (U filter), 15.72 mag (B filter), 16.13 mag (V filter) |
| C-Star Spectral Type | Of/WR(C)? |
| Discoverer | JONES 1941 |
Finder Chart
The planetary nebula Jones 1 is located in the constellation Pegasus, about 1° southeast of the 4.9 mag bright star 72 Pegasi. It is circumpolar in Central Europe, but the best time to observe it is June to November, when the constellation is highest at night.
