Double Star 13239+5456 Position and Visibility Tonight
Where is 13239+5456 right now?
13239+5456 is located in the constellation Ursa Major. At the current time, it is above the horizon at an altitude of 29 degrees toward the northwest from your location, with an apparent magnitude of 3.0.
Twilight begins at 18:46 local time, and at that moment, 13239+5456 will appear at an altitude of 29 degrees toward the northwest.
Twilight begins at 18:46 local time, and at that moment, 13239+5456 will appear at an altitude of 29 degrees toward the northwest.
13239+5456 Visibility on March 02
13239+5456 is Not visible tonight
13239+5456 Rise and Set Timetable
| Time | Elevation | |
| 13239+5456 is always above the horizon | ||
Moon Rise, 97.4% illuminated  | 14:24 | 4° |
| Sunset | 16:00 | 11° |
| Civil sunset | 16:28 | 13° |
| Astrosession begin | 17:28 | 20° |
| 13239+5456 is always above the horizon | ||
| 13239+5456 transit | 00:50 | 72° |
| Astrosession end | 03:10 | 60° |
| Civil sunrise | 04:11 | 52° |
| Moon Set | 04:16 | 51° |
| Sunrise | 04:38 | 48° |
Track 13239+5456 Position Throughout the Night
← Mon, 2 March 2026 →
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Shift the map to change the time and observe 13239+5456 changing position in the night sky.
13239+5456 Star System Description
13239+5456 is 12-star Star System located in constellation Ursa Major at coordinates RA: 13h 23m 55s", Dec: 54° 55' 31s.
The primary component has a magnitude of 3.0, while the secondary component has a magnitude of 3.88. They are separated by 13.9 arcseconds at a position angle of 143 degrees. The brightness difference between the two components is 0.88 magnitudes, with the primary component being approximately 2.2 times brighter than the secondary.
Below is a table with star system details from the Washington Double Star (WDS) Catalog. This catalog is a comprehensive source of information on double and multiple star systems, providing key data on the positions, magnitudes, and separations of stellar components.
The primary component has a magnitude of 3.0, while the secondary component has a magnitude of 3.88. They are separated by 13.9 arcseconds at a position angle of 143 degrees. The brightness difference between the two components is 0.88 magnitudes, with the primary component being approximately 2.2 times brighter than the secondary.
Below is a table with star system details from the Washington Double Star (WDS) Catalog. This catalog is a comprehensive source of information on double and multiple star systems, providing key data on the positions, magnitudes, and separations of stellar components.
Technical Details of Star System 13239+5456
| Property | Value |
|---|---|
| Star System Identifier | 13239+5456 |
| System Type | 12-star Star System |
| Primary Star | zet UMa |
| Right Ascension (RA) | 13.39872 (13h 23m 55s") |
| Declination (Dec) | 54.92542 (54° 55' 31s) |
| Magnitude (Primary) | 3.0 |
| Magnitude (Secondary) | 3.88 |
| Spectral Type (Primary/Secondary) | A1VpSrSi |
| Separation (Arcseconds) | 13.9 |
| Position Angle | 143° |
| Discovery Year | 1925 |
| Last Observed | 2004 |
| Primary Proper Motion (Ra, Dec) | +122-020 |
| Secondary Proper Motion (Ra, Dec) | |
| Number of Observations | 63 |
13239+5456 Components
| Component | Magnitude | Separation (arcseconds) | Position Angle |
| AB | 3.88 | 13.9 | 143 |
| Aa,Ab | 3.0 | 0.0 | 247 |
| AC | 4.01 | 720.0 | 72 |
| AD | 7.62 | 498.7 | 101 |
| AE | 6.88 | 999.9 | 321 |
| AF | 9.86 | 999.9 | 359 |
| Ca,Cb | 8. | 1.1 | 209 |
| CE | 6.88 | 999.9 | 317 |
| CF | 9.86 | 999.9 | 355 |
| CG | 8.21 | 999.9 | 271 |
| CH | 8.63 | 999.9 | 243 |
The data presented in this table is sourced from the Washington Double Star (WDS) Catalog, a comprehensive repository of double and multiple star system information maintained by the U.S. Naval Observatory. We thank the WDS team for their continued efforts in providing accurate and detailed astronomical data.
Finder Chart for zet UMa
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| Object name | 13239+5456 |
| Field of view | |
| Limiting magnitude | |
| 13239+5456 coordinates | 13.39872, 54.92542 |
| Center coordinates | 13.39872, 54.92542 |
13239+5456 Passage Through Night
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Current position of 13239+5456
| Time | 18:46 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| 13239+5456 elevation | 29° |
| 13239+5456 Azimuth | -41° |
Here you can see the current position of the 13239+5456 on the map, as well as its positions for rise and set. This tool allows you to track the 13239+5456's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 13239+5456
13239+5456 will be visible until October, 3, 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.
| Date | Tue, 3 March 2026 |
| Twighlight start | 17:28 |
| Twighlight end | 03:08 |
| Twighlight duration | 10h 39m |
| Rise | 13239+5456 is always up |
| Set | 13239+5456 is always up |
| Elevation at transit | 72° |
| Transit time | 00:46 |
| Equatorial coordinates | RA: 13h 23m 55s", Dec: 54° 55' 31s |
| Magnitude | 3 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of a 13239+5456, 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 13239+5456 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.
You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
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 13239+5456 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.
You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
Astrometric & Physical Parameters of 13239+5456
Coordinates & Visibility
| Right Ascension | 13.39872° |
| Declination | 54.92542° |
| Magnitude | 3.0 |
| Constellation | Ursa Major |
| Elevation | 29.1° |
| Azimuth | -41.1° |