Arcturus Observation Details
Arcturus Daily Motion
Arcturus will reach its transit before twilight, at 13:50. By the onset of twilight at 18:14, it will be at elevation, and it will set before sunrise, at 20:51.Arcturus will be visible until September, 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.
Arcturus Visibility Timetable on September 14
Arcturus Rise and Set Timetable
| Time | Elevation | |
| Arcturus transit | 13:50 | 72° |
| Sunset | 17:16 | 42° |
| Civil sunset | 17:44 | 36° |
| Astrosession begin | 18:46 | 24° |
| Arcturus set | 20:51 | |
| Moon Rise, 52.2% illuminated | 21:08 | -3° |
| Astrosession end | 03:20 | -29° |
| Arcturus rise | 06:46 | |
| Moon Set | 13:03 | 69° |
Track Arcturus Position Throughout the Night
← Sun, 14 September 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Arcturus changing position in the night sky.
Where is Arcturus right now?
Arcturus is located in the constellation Bootes, at right ascension 14h 15m 39s" and declination 19° 10' 56s. Although it is currently above the horizon at an altitude of 59 degrees, Arcturus is not visible because it is daytime.Arcturus - Red Giant Star
Arcturus is the brightest star in the constellation Boötes and the fourth-brightest star in the night sky. It is a red giant star approximately 36.7 light-years away from Earth.
With an apparent magnitude of -0.05, Arcturus is one of the most luminous stars in the Sun's neighborhood and is often used in celestial navigation. It is larger and cooler than the Sun, giving it a distinct orange hue.
Finder Chart for Arcturus
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| Object name | Arcturus |
| Field of view | |
| Limiting magnitude | |
| Arcturus coordinates | 14.261029999999998, 19.18241 |
| Center coordinates | 14.261029999999998, 19.18241 |
Arcturus Passage Through Night
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Current position of Arcturus
| Time | 11:56 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Arcturus elevation | 59° |
| Arcturus Azimuth | -118° |
Here you can see the current position of the Arcturus on the map, as well as its positions for rise and set. This tool allows you to track the Arcturus's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of Arcturus
| Date | Sun, 14 September 2025 |
| Twighlight start | 18:42 |
| Twighlight end | 03:14 |
| Twighlight duration | 9h 32m |
| Rise | 06:46 |
| Set | 20:47 |
| Elevation at transit | 72° |
| Transit time | 13:46 |
| Equatorial coordinates | RA: 14h 15m 39s", Dec: 19° 10' 56s |
| Magnitude | -0 |
| Constellation | Bootes |
The graph illustrates the annual visibility pattern of a Arcturus, 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 Arcturus 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 Arcturus 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 Arcturus
Coordinates & Visibility
| Right Ascension | 14.261029999999998° |
| Declination | 19.18241° |
| Magnitude | -0.05 |
| Constellation | Bootes |
| Elevation | 59.1° |
| Azimuth | -118.1° |