Double Star 13239+5456 Observation Details
13239+5456 Daily Motion
13239+5456 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 13239+5456, when it reaches its highest elevation, in the annual motion section.13239+5456 will become visible in October, 23. After being too close to the Sun to observe, it will reappear in the night sky. Starting from October, 23, 13239+5456 can be seen again, providing a good opportunity for observation.
13239+5456 Visibility Timetable on October 11
13239+5456 Rise and Set Timetable
| Time | Elevation | |
| 13239+5456 is always above the horizon | ||
| 13239+5456 transit | 11:13 | 72° |
| Sunset | 16:35 | 35° |
| Civil sunset | 17:03 | 31° |
| Astrosession begin | 18:03 | 23° |
| 13239+5456 is always above the horizon | ||
| Moon Rise, 78% illuminated | 19:01 | 17° |
| Astrosession end | 03:45 | 19° |
| Civil sunrise | 04:46 | 27° |
| Sunrise | 05:13 | 30° |
| Moon Set | 10:53 | 72° |
Track 13239+5456 Position Throughout the Night
← Sat, 11 October 2025 →
| Time | |
| Altitude | |
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Shift the map to change the time and observe 13239+5456 changing position in the night sky.
Where is 13239+5456 right now?
13239+5456 is located in the constellation Ursa Major, at right ascension 13h 23m 55s" and declination 54° 55' 31s. At the current time, it is above the horizon at an altitude of 19 degrees toward the northeast from your location, with an apparent magnitude of 3.0.13239+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 | 18:43 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| 13239+5456 elevation | 19° |
| 13239+5456 Azimuth | 34° |
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
| Date | Sun, 12 October 2025 |
| Twighlight start | 18:01 |
| Twighlight end | 03:44 |
| Twighlight duration | 10h 42m |
| Rise | 13239+5456 is always up |
| Set | 13239+5456 is always up |
| Elevation at transit | 72° |
| Transit time | 11:09 |
| 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.
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.
Astrometric & Physical Parameters of 13239+5456
Coordinates & Visibility
| Right Ascension | 13.39872° |
| Declination | 54.92542° |
| Magnitude | 3.0 |
| Constellation | Ursa Major |
| Elevation | 18.6° |
| Azimuth | 34° |