Double Star 12021+4303 Observation Details
12021+4303 Daily Motion
12021+4303 will reach its transit before twilight, at 21:16. By the onset of twilight at 21:29, it will be at 85° elevation, and it will set before after, at 06:31.12021+4303 will be visible until August, 16, 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.
12021+4303 Visibility Timetable on May 21
12021+4303 Rise and Set Timetable
| Time | Elevation | |
| Sunset | 20:19 | 79° |
| Civil sunset | 20:51 | 84° |
| 12021+4303 transit | 21:16 | 86° |
| Astrosession begin | 22:11 | 79° |
| Moon Rise, 41.7% illuminated | 02:31 | 33° |
| Astrosession end | 04:01 | 18° |
| Civil sunrise | 05:21 | 8° |
| Sunrise | 05:53 | 4° |
| 12021+4303 set | 06:31 | |
| 12021+4303 rise | 11:56 | |
| Moon Set | 14:05 | 15° |
Track 12021+4303 Position Throughout the Night
← Wed, 21 May 2025 →
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Shift the map to change the time and observe 12021+4303 changing position in the night sky.
12021+4303 Star System Description
12021+4303 is 7-star Star System located in constellation Ursa Major at coordinates RA: 12h 02m 06s", Dec: 43° 02' 44s.
The primary component has a magnitude of 5.24, while the secondary component has a magnitude of 6.72. They are separated by 5.3 arcminutes at a position angle of 51 degrees. The brightness difference between the two components is 1.48 magnitudes, with the primary component being approximately 3.9 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 5.24, while the secondary component has a magnitude of 6.72. They are separated by 5.3 arcminutes at a position angle of 51 degrees. The brightness difference between the two components is 1.48 magnitudes, with the primary component being approximately 3.9 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 12021+4303
| Property | Value |
|---|---|
| Star System Identifier | 12021+4303 |
| System Type | 7-star Star System |
| Primary Star | 67 UMa |
| Right Ascension (RA) | 12.03522 (12h 02m 06s") |
| Declination (Dec) | 43.04564 (43° 02' 44s) |
| Magnitude (Primary) | 5.24 |
| Magnitude (Secondary) | 6.72 |
| Spectral Type (Primary/Secondary) | A7m |
| Separation (Arcseconds) | 315.0 |
| Position Angle | 51° |
| Discovery Year | 1897 |
| Last Observed | 2015 |
| Primary Proper Motion (Ra, Dec) | -327+072 |
| Secondary Proper Motion (Ra, Dec) | -347-512 |
| Number of Observations | 15 |
12021+4303 Components
| Component | Magnitude | Separation (arcseconds) | Position Angle |
| AB | 6.72 | 315.0 | 51 |
| AC | 8.47 | 369.3 | 19 |
| AD | 8.91 | 409.2 | 269 |
| BC | 8.47 | 194.8 | 321 |
| Da,Db | 12.32 | 0.6 | 86 |
| Da,Dc | . | 0.3 | 31 |
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 67 UMa
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| Object name | 12021+4303 |
| Field of view | |
| Limiting magnitude | |
| 12021+4303 coordinates | 12.03522, 43.04564 |
| Center coordinates | 12.03522, 43.04564 |
12021+4303 Passage Through Night
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Current position of 12021+4303
| Time | 08:27 |
| Latitude | 39.0469 |
| Longitude | -77.4903 |
| 12021+4303 elevation | -7° |
| 12021+4303 Azimuth | 9° |
Here you can see the current position of the 12021+4303 on the map, as well as its positions for rise and set. This tool allows you to track the 12021+4303's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 12021+4303
| Date | Wed, 21 May 2025 |
| Twighlight start | 22:07 |
| Twighlight end | 03:56 |
| Twighlight duration | 6h 49m |
| Rise | 12:00 |
| Set | 06:31 |
| Elevation at transit | 86° |
| Transit time | 21:16 |
| Equatorial coordinates | RA: 12h 02m 06s", Dec: 43° 02' 44s |
| Magnitude | 5 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of a 12021+4303, 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 12021+4303 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 12021+4303 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.