Double Star 09521+5404 Observation Details
09521+5404 Daily Motion
09521+5404 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 72 degrees over time. You can find the best times to observe 09521+5404, when it reaches its highest elevation, in the annual motion section.09521+5404 will be visible until July, 12, 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.
09521+5404 Visibility Timetable on May 31
09521+5404 Rise and Set Timetable
| Time | Elevation | |
| 09521+5404 is always above the horizon | ||
| Moon Rise, 15.8% illuminated | 09:21 | 9° |
| 09521+5404 transit | 18:49 | 76° |
| Sunset | 20:52 | 65° |
| Civil sunset | 21:25 | 60° |
| Astrosession begin | 22:51 | 48° |
| 09521+5404 is always above the horizon | ||
| Moon Set | 00:51 | 31° |
| Astrosession end | 04:07 | 10° |
| Civil sunrise | 05:33 | 5° |
| Sunrise | 06:07 | 4° |
Track 09521+5404 Position Throughout the Night
← Sat, 31 May 2025 →
| Time | |
| Altitude | |
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Shift the map to change the time and observe 09521+5404 changing position in the night sky.
09521+5404 Star System Description
09521+5404 is Double Star System located in constellation Ursa Major at coordinates RA: 09h 52m 06s", Dec: 54° 03' 51s.
The primary component has a magnitude of 5.28, while the secondary component has a magnitude of 5.39. They are separated by 0.4 arcseconds at a position angle of 4 degrees. The brightness difference between the two components is 0.11 magnitudes, with the primary component being approximately 1.1 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 5.28, while the secondary component has a magnitude of 5.39. They are separated by 0.4 arcseconds at a position angle of 4 degrees. The brightness difference between the two components is 0.11 magnitudes, with the primary component being approximately 1.1 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 09521+5404
| Property | Value |
|---|---|
| Star System Identifier | 09521+5404 |
| System Type | Double Star System |
| Primary Star | phi UMa |
| Right Ascension (RA) | 9.86842 (09h 52m 06s") |
| Declination (Dec) | 54.06428 (54° 03' 51s) |
| Magnitude (Primary) | 5.28 |
| Magnitude (Secondary) | 5.39 |
| Spectral Type (Primary/Secondary) | A2V |
| Separation (Arcseconds) | 0.4 |
| Position Angle | 4° |
| Discovery Year | 1842 |
| Last Observed | 2023 |
| Primary Proper Motion (Ra, Dec) | -005+021 |
| Secondary Proper Motion (Ra, Dec) | |
| Number of Observations | 328 |
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 phi UMa
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| Object name | 09521+5404 |
| Field of view | |
| Limiting magnitude | |
| 09521+5404 coordinates | 9.86842, 54.06428 |
| Center coordinates | 9.86842, 54.06428 |
09521+5404 Passage Through Night
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Current position of 09521+5404
| Time | 12:07 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| 09521+5404 elevation | 26° |
| 09521+5404 Azimuth | -40° |
Here you can see the current position of the 09521+5404 on the map, as well as its positions for rise and set. This tool allows you to track the 09521+5404's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 09521+5404
| Date | Sat, 31 May 2025 |
| Twighlight start | 22:47 |
| Twighlight end | 04:02 |
| Twighlight duration | 5h 15m |
| Rise | 09521+5404 is always up |
| Set | 09521+5404 is always up |
| Elevation at transit | 76° |
| Transit time | 18:45 |
| Equatorial coordinates | RA: 09h 52m 06s", Dec: 54° 03' 51s |
| Magnitude | 5 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of a 09521+5404, 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 09521+5404 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 09521+5404 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.