DSS image of Polis
Overlaid DSS image of Polis, 60' x 60' with north at top and west to the right

Aladin viewer for the region around Polis
Mu Sagittarii, μ Sgr, 13 Sgr
BD-21 4908, HD 166937, HR 6812, WDS J18138-2104, SAO 186497, GSC 06276-03093, HIP 89341

Type  Star
Magnitude  3.85
Right Ascension  18h 13' 45.8"  (2000)
Declination  21° 3' 32" S
Constellation  Sagittarius
Classification  B8Iab(e)
Observing Notes

Andrew Cooper
Sep 16, 2020    Waikoloa, HI (map)
20cm f/6 Newtonian, Cave Astrola @ 76x
Seeing: 5 Transparency: 6 Moon: 11%

Brilliant white, a 10th magnitude companion visible 50" northwest, another 9th magnitude companion visble 1' east, the 10th magnitude 16" companion is not visible, in very rich galactic starfield

Checking the Gaia DR2 data... μSgr A has a parallax 0.69mas
μSgr B & C are 17" west magnitudes 10.5/11.0 parallax 0.66mas
μSgr D is HD 314059 at magnitude 9.8 and 48" northwest parallax 0.99mas
μSgr E is HD 314057 at magnitude 10.7 and 50" southeast parallax 0.90mas
Other Data Sources for Polis
Associated objects for Polis
Nearby objects for Polis

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

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