Sadr Observation Details
Sadr Daily Motion
Sadr will rise before twilight begins, at 12:15, and will reach 63° elevation by the time twilight commences at 18:38. It will reach its transit at 87° by 20:55 and gradually fade away as the night ends at 03:38, maintaining an elevation of around 16°.Sadr will be visible until January, 15, when it will move too close to the Sun. During this time, its proximity to the Sun will cause it to disappear from the night sky, making it unobservable for a while.
Sadr Visibility Timetable on August 30
Sadr Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 36.6% illuminated | 10:57 | -8° |
| Sadr rise | 12:15 | |
| Sunset | 17:39 | 52° |
| Civil sunset | 18:07 | 57° |
| Astrosession begin | 19:12 | 70° |
| Moon Set | 20:42 | 86° |
| Sadr transit | 20:55 | 87° |
| Astrosession end | 03:05 | 21° |
| Civil sunrise | 04:10 | 11° |
| Sunrise | 04:38 | 7° |
| Sadr set | 05:34 |
Track Sadr Position Throughout the Night
← Sat, 30 August 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Sadr changing position in the night sky.
Where is Sadr right now?
Sadr is located in the constellation Cygnus, at right ascension 20h 22m 13s" and declination 40° 15' 24s. At the current time, it is below the horizon and not visible from your location.Sadr - Yellow Supergiant Star
Sadr is the central star in the Northern Cross asterism and the thirty-ninth-brightest star in the night sky. It is a yellow supergiant star located about 1,800 light-years away from Earth.
Sadr has an apparent magnitude of 2.23 and is one of the most prominent stars in the summer sky in the Northern Hemisphere.
Finder Chart for Sadr
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| Object name | Sadr |
| Field of view | |
| Limiting magnitude | |
| Sadr coordinates | 20.370473, 40.256679 |
| Center coordinates | 20.370473, 40.256679 |
Sadr Passage Through Night
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Current position of Sadr
| Time | 11:30 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Sadr elevation | -5° |
| Sadr Azimuth | -28° |
Here you can see the current position of the Sadr on the map, as well as its positions for rise and set. This tool allows you to track the Sadr's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of Sadr
| Date | Sat, 30 August 2025 |
| Twighlight start | 19:07 |
| Twighlight end | 02:58 |
| Twighlight duration | 8h 51m |
| Rise | 12:11 |
| Set | 05:31 |
| Elevation at transit | 87° |
| Transit time | 20:51 |
| Equatorial coordinates | RA: 20h 22m 13s", Dec: 40° 15' 24s |
| Magnitude | 2 |
| Constellation | Cygnus |
The graph illustrates the annual visibility pattern of a Sadr, providing a comprehensive overview of its daily appearances and transit times throughout the year.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Sadr is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the Sadr is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
Astrometric & Physical Parameters of Sadr
Coordinates & Visibility
| Right Ascension | 20.370473° |
| Declination | 40.256679° |
| Magnitude | 2.23 |
| Constellation | Cygnus |
| Elevation | -4.8° |
| Azimuth | -28.4° |