HD 172178
Overlaid DSS image of HD 172178, 60' x 60' with north at top and west to the right
Aladin viewer for the region around HD 172178
CD-25 13318, WDS J18399-2531C, SAO 187103, GSC 06862-01156, HIP 91515
| Type | Star |
|---|---|
| Magnitude | 8.8 | Right Ascension | 18h 39' 48.5" (2000) |
| Declination | 25° 30' 3" S |
| Constellation | Sagittarius |
| Classification | A1V |
Observing Notes
Andrew Cooper
Aug 9, 2020 Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6 Moon: 0%
At first glance this appears to be a binary with a pair of 8th magnitude stars 1' apart, a closer look reveals a 9th magnitude companion 7" southwest of the eastern HD172193, several other 11-12th magnitude stars lie a couple minutes south making a interesting little group
The close eastern HD172193 pair is catlogued as A and B while the western HD172178 is C
While compelling visually, the Gaia DR2 parallax and proper motion data indicates that the A B pair is probably binary while the association of C is visual only, not physically bound
Other Data Sources for HD 172178
Associated objects for HD 172178
Nearby objects for HD 172178
14 objects found within 120'
| 24 Sagittarii | 25 Sagittarii | 26 Sagittarii |
| Barnard 98 | HD 171961 | HD 172193 |
| HD 173117 | IC 1290 | Messier 22 |
| NGC 6644 | Phi Sagittarii | PK6-8.1 |
| PK8-7.1 | PK9-9.1 |
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
HD 172178