Double Star 15394+3638 Observation Details
15394+3638 Daily Motion
15394+3638 will not be observable tonight. It will reach its transit at 89° by 15:33 and set at 23:50. Throughout the night, from 23:56 to 03:47, it will be below the horizon. 15394+3638 will rise again after sunrise, at 07:13.15394+3638 will be visible until November, 4, 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.
15394+3638 Visibility Timetable on September 09
15394+3638 Rise and Set Timetable
| Time | Elevation | |
| 15394+3638 transit | 15:33 | 89° |
| Sunset | 17:24 | 68° |
| Civil sunset | 17:51 | 63° |
| Moon Rise, 97.5% illuminated | 17:59 | 61° |
| Astrosession begin | 18:54 | 50° |
| 15394+3638 set | 23:50 | |
| Astrosession end | 03:15 | -16° |
| Moon Set | 06:57 | -2° |
| 15394+3638 rise | 07:13 |
Track 15394+3638 Position Throughout the Night
← Tue, 9 September 2025 →
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Shift the map to change the time and observe 15394+3638 changing position in the night sky.
Where is 15394+3638 right now?
15394+3638 is located in the constellation Corona Borealis, at right ascension 15h 39m 22s" and declination 36° 38' 08s. At the current time, it is below the horizon and not visible from your location.15394+3638 Star System Description
15394+3638 is Double Star System located in constellation Corona Borealis at coordinates RA: 15h 39m 22s", Dec: 36° 38' 08s.
The primary component has a magnitude of 4.96, while the secondary component has a magnitude of 5.91. They are separated by 5.5 arcseconds at a position angle of 296 degrees. The brightness difference between the two components is 0.95 magnitudes, with the primary component being approximately 2.4 times brighter than the secondary.
The primary and secondary stars are both blue-white in color
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 4.96, while the secondary component has a magnitude of 5.91. They are separated by 5.5 arcseconds at a position angle of 296 degrees. The brightness difference between the two components is 0.95 magnitudes, with the primary component being approximately 2.4 times brighter than the secondary.
The primary and secondary stars are both blue-white in color
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 15394+3638
| Property | Value |
|---|---|
| Star System Identifier | 15394+3638 |
| System Type | Double Star System |
| Primary Star | zet 2 CrB |
| Right Ascension (RA) | 15.65628 (15h 39m 22s") |
| Declination (Dec) | 36.63583 (36° 38' 08s) |
| Magnitude (Primary) | 4.96 |
| Magnitude (Secondary) | 5.91 |
| Spectral Type (Primary/Secondary) | B7V+B9V (blue-white/blue-white) |
| Separation (Arcseconds) | 5.5 |
| Position Angle | 296° |
| Discovery Year | 1779 |
| Last Observed | 2021 |
| Primary Proper Motion (Ra, Dec) | -017-004 |
| Secondary Proper Motion (Ra, Dec) | -015-007 |
| Number of Observations | 344 |
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 2 CrB
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| Object name | 15394+3638 |
| Field of view | |
| Limiting magnitude | |
| 15394+3638 coordinates | 15.65628, 36.63583 |
| Center coordinates | 15.65628, 36.63583 |
15394+3638 Passage Through Night
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Current position of 15394+3638
| Time | 23:56 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| 15394+3638 elevation | -1° |
| 15394+3638 Azimuth | 41° |
Here you can see the current position of the 15394+3638 on the map, as well as its positions for rise and set. This tool allows you to track the 15394+3638's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 15394+3638
| Date | Wed, 10 September 2025 |
| Twighlight start | 18:48 |
| Twighlight end | 03:10 |
| Twighlight duration | 8h 22m |
| Rise | 07:13 |
| Set | 23:46 |
| Elevation at transit | 89° |
| Transit time | 15:29 |
| Equatorial coordinates | RA: 15h 39m 22s", Dec: 36° 38' 08s |
| Magnitude | 5 |
| Constellation | Corona Borealis |
The graph illustrates the annual visibility pattern of a 15394+3638, 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 15394+3638 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 15394+3638 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 15394+3638
Coordinates & Visibility
| Right Ascension | 15.65628° |
| Declination | 36.63583° |
| Magnitude | 4.96 |
| Constellation | Corona Borealis |
| Elevation | -0.7° |
| Azimuth | 40.5° |