Alcor Observation Details
Alcor Daily Motion
Alcor is circumpolar, never setting below the horizon and always visible in the night sky from your location. However, it will change its position significantly, moving 70 degrees over time. You can find the best times to observe Alcor, when it reaches its highest elevation, in the annual motion section.Alcor will be visible until October, 9, 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.
Alcor Visibility Timetable on June 01
Alcor Rise and Set Timetable
| Time | Elevation | |
| Alcor is always above the horizon | ||
| Moon Rise, 25.1% illuminated | 10:34 | 5° |
| Sunset | 20:52 | 69° |
| Civil sunset | 21:26 | 73° |
| Alcor transit | 22:17 | 75° |
| Astrosession begin | 22:53 | 74° |
| Alcor is always above the horizon | ||
| Moon Set | 01:23 | 56° |
| Astrosession end | 04:06 | 33° |
| Civil sunrise | 05:33 | 22° |
| Sunrise | 06:06 | 19° |
Track Alcor Position Throughout the Night
← Sun, 1 June 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Alcor changing position in the night sky.
Finder Chart for Alcor
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| Object name | Alcor |
| Field of view | |
| Limiting magnitude | |
| Alcor coordinates | 13.420413, 54.987958 |
| Center coordinates | 13.420413, 54.987958 |
Alcor Passage Through Night
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Current position of Alcor
| Time | 19:44 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| Alcor elevation | 60° |
| Alcor Azimuth | -46° |
Here you can see the current position of the Alcor on the map, as well as its positions for rise and set. This tool allows you to track the Alcor's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of Alcor
| Date | Sun, 1 June 2025 |
| Twighlight start | 22:48 |
| Twighlight end | 04:01 |
| Twighlight duration | 5h 13m |
| Rise | Alcor is always up |
| Set | Alcor is always up |
| Elevation at transit | 75° |
| Transit time | 22:14 |
| Equatorial coordinates | RA: 13h 25m 13s", Dec: 54° 59' 16s |
| Magnitude | 4 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of a Alcor, 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 Alcor 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 Alcor 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.