Cannon 3-1
Overlaid DSS image of Cannon 3-1, 30' x 30' with north at top and west to the right
Aladin viewer for the region around Cannon 3-1
Cn 3-1, PK 38+12.1, PK 038+12 1, IRAS 18152+1007, GSC 01014-00028, 2MASS J18173410+1009034
| Type | Planetary Nebula |
|---|---|
| Magnitude | 12.49 |
| Size | 0.083' x 0.09' |
| Right Ascension | 18h 17' 34.1" (2000) |
| Declination | 10° 9' 3" N |
| Constellation | Ophiuchus |
| Description | 13"-vF, S, R, nBM, low surface brightness at 100X |
| Classification | 07Ib(f) |
Observing Notes
Andrew Cooper
Aug 29, 2021 Waikoloa, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 311x
Seeing: 6 Transparency: 6 Moon: 0%
Appears completely stellar even at moderately high magnification, no color or structure noted, confirmed with starfield in SkySafari using the Gaia database.
A follow up observation after last night's failure to recognize the object due to plotting issues in Sky Safari that showed the object just to the west of the actual position and not co-located with the stellar object.
Anne Jump Cannon discovered this planetary nebulae in noting the odd spectra of the star around 1923.
Andrew Cooper
Aug 28, 2021 Waikoloa, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 175x
Seeing: 6 Transparency: 6 Moon: 0%
Not seen despite good confirmation of the starfield, is 13.5 magnitude correct? a tight group of 14-15 magnitude stars 2' west could easily be mistaken for a nebula by an unwary amateur observer.
Note: Sky Safari plotted the nebula just to the west of an easily visible star in the field... The planetary is this star! See Cannon A. J., Stars having peculiar spectra, Harvard Circular, 1921
Other Data Sources for Cannon 3-1
Nearby objects for Cannon 3-1
Credits...
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
A complete list of credits and sources can be found on the about page
Cannon 3-1