Alcor Position and Visibility Tonight
Where is Alcor right now?
Alcor is located in the constellation Ursa Major. Although Alcor is currently 47° above the horizon, it is not visible because it is daytime.
Twilight begins at 17:54 local time. At that moment, Alcor will be 32° above the horizon toward the north-west.
Twilight begins at 17:54 local time. At that moment, Alcor will be 32° above the horizon toward the north-west.
Alcor visibility on 2026-09-27
Alcor Visible all night
Alcor rise and set timetable
| Time | Elevation | |
| Alcor is always above the horizon | ||
| Alcor transit | 12:10 | 72° |
Moonrise, 99.8% illuminated  | 16:51 | 41° |
| Sunset | 16:57 | 40° |
| Civil sunset | 17:24 | 36° |
| Twilight start (−12°) | 17:54 | 32° |
| Astronomical observing session begins | 18:25 | 28° |
| Alcor is always above the horizon | ||
| Astronomical observing session ends | 03:33 | 12° |
| Twilight end (−12°) | 04:03 | 15° |
| Civil sunrise | 04:34 | 18° |
| Sunrise | 05:01 | 22° |
| Moonset | 06:07 | 30° |
Track Alcor position throughout the night
← 27 September 2026 →
| 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 | 13.42041, 54.98796 |
| Center coordinates | 13.42041, 54.98796 |
Alcor Passage Through Night
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Current position of Alcor
| Time | 16:04 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 47° |
| Azimuth | 314° |
Here you can see the current position of Alcor on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.
When Is Alcor Visible Throughout the Year?
Alcor will remain visible until October 3, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Mon, 28 September 2026 |
| Astronomical observing session begins | 18:23 |
| Astronomical observing session ends | 03:31 |
| Astronomical observing duration | 9h 8m |
| Rise | Alcor is always up |
| Set | Alcor is always up |
| Elevation at transit | 72° |
| Transit time | 12:06 |
| Equatorial coordinates | RA: 13h 25m 13s", Dec: 54° 59' 16s |
| Magnitude | 4 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of Alcor, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also see when Alcor is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when Alcor is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of Alcor
Coordinates and Visibility
| Right Ascension | 13h 25m 13s |
| Declination | 54° 59′ 17″ |
| Magnitude | 3.99 |
| Constellation | Ursa Major |
| Elevation | 47.2° |
| Azimuth | 313.8° |
| Spectral type | A5V SB |