Rasalhague Observation Details
Rasalhague Daily Motion
Rasalhague will reach its transit before twilight, at 16:53. By the onset of twilight at 18:42, it will be at elevation, and it will set before sunrise, at 23:31.Rasalhague will be visible until November, 20, 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.
Rasalhague Visibility Timetable on September 18
Rasalhague Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 19.7% illuminated | 00:26 | -9° |
| Moon Set | 15:21 | 58° |
| Rasalhague transit | 16:53 | 65° |
| Sunset | 17:10 | 65° |
| Civil sunset | 17:37 | 63° |
| Astrosession begin | 18:39 | 56° |
| Rasalhague set | 23:31 | |
| Astrosession end | 03:24 | -36° |
| Rasalhague rise | 10:11 |
Track Rasalhague Position Throughout the Night
← Thu, 18 September 2025 →
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Shift the map to change the time and observe Rasalhague changing position in the night sky.
Where is Rasalhague right now?
Rasalhague is located in the constellation Ophiuchus, at right ascension 17h 34m 56s" and declination 12° 33' 36s. At the current time, it is above the horizon at an altitude of 55 degrees toward the southeast from your location, with an apparent magnitude of 2.08.Finder Chart for Rasalhague
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| Object name | Rasalhague |
| Field of view | |
| Limiting magnitude | |
| Rasalhague coordinates | 17.582241, 12.560035000000001 |
| Center coordinates | 17.582241, 12.560035000000001 |
Rasalhague Passage Through Night
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Current position of Rasalhague
| Time | 18:42 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Rasalhague elevation | 55° |
| Rasalhague Azimuth | 128° |
Here you can see the current position of the Rasalhague on the map, as well as its positions for rise and set. This tool allows you to track the Rasalhague's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of Rasalhague
| Date | Fri, 19 September 2025 |
| Twighlight start | 18:37 |
| Twighlight end | 03:23 |
| Twighlight duration | 9h 46m |
| Rise | 10:11 |
| Set | 23:27 |
| Elevation at transit | 65° |
| Transit time | 16:49 |
| Equatorial coordinates | RA: 17h 34m 56s", Dec: 12° 33' 36s |
| Magnitude | 2 |
| Constellation | Ophiuchus |
The graph illustrates the annual visibility pattern of a Rasalhague, 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 Rasalhague 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 Rasalhague 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 Rasalhague
Coordinates & Visibility
| Right Ascension | 17.582241° |
| Declination | 12.560035000000001° |
| Magnitude | 2.08 |
| Constellation | Ophiuchus |
| Elevation | 55.3° |
| Azimuth | 128.4° |