Omicron¹ Cygni (ο¹ Cyg)
Omicron¹ Cygni (ο¹ Cyg) is a double star in the constellation Cygnus, magnitude 3.9.
An orange giant with a bluish companion. Its components (magnitudes 3.9 and 7.0) lie 106.7″ apart at PA 173° (measured 2023). 30 Cygni (magnitude 4.8) lies 336.7″ away, completing a fine wide triple.
When and where to see it
It is best placed in the evening sky around August, when it crosses the meridian at about 10 pm local time (around midnight in July). It can be seen from everywhere north of 43°S and never sets north of 43°N.
At its highest it stands 87° up from 50°N, 78° up from 35°N, 43° up from the equator, 8° up from 35°S.
Facts
- Type
- Double star
- Constellation
- Cygnus
- Designations
- ο¹ Cyg, 31 Cyg, 31 Cygni, 30 Cyg, 30 Cygni, STFA 50, HIP 99675
- Magnitude
- 3.9
- Position
- RA 20h 13.6m, Dec +46° 44′ (J2000)
Open AstroPilot to see when Omicron¹ Cygni (ο¹ Cyg) is highest tonight from your location, how easy it is with your telescope or binoculars, and an eyepiece view.