Double Star 02507+5554 Observation Details
02507+5554 Daily Motion
02507+5554 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 68 degrees over time. You can find the best times to observe 02507+5554, when it reaches its highest elevation, in the annual motion section.02507+5554 will be visible until April, 15, 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.
02507+5554 Visibility Timetable on June 30
02507+5554 Rise and Set Timetable
| Time | Elevation | |
| 02507+5554 is always above the horizon | ||
| Moon Rise, 20.3% illuminated | 10:34 | 73° |
| Sunset | 21:03 | 6° |
| Civil sunset | 21:37 | 6° |
| Astrosession begin | 23:07 | 7° |
| 02507+5554 is always above the horizon | ||
| Moon Set | 00:12 | 11° |
| Astrosession end | 04:04 | 34° |
| Civil sunrise | 05:34 | 46° |
| Sunrise | 06:08 | 51° |
| 02507+5554 transit | 09:47 | 74° |
Track 02507+5554 Position Throughout the Night
← Mon, 30 June 2025 →
| Time | |
| Altitude | |
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Shift the map to change the time and observe 02507+5554 changing position in the night sky.
02507+5554 Star System Description
02507+5554 is 7-star Star System located in constellation Perseus at coordinates RA: 02h 50m 41s", Dec: 55° 53' 43s.
The primary component has a magnitude of 3.76, while the secondary component has a magnitude of 8.50. They are separated by 26 arcseconds at a position angle of 290 degrees. The brightness difference between the two components is 4.74 magnitudes, with the primary component being approximately 78.7 times brighter than the secondary.
The primary star is red in color, and the secondary star is blue-white.
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.
T: Statistically the same parallax within the errors and similar proper motion or other technique indicates that this pair is physical.
The primary component has a magnitude of 3.76, while the secondary component has a magnitude of 8.50. They are separated by 26 arcseconds at a position angle of 290 degrees. The brightness difference between the two components is 4.74 magnitudes, with the primary component being approximately 78.7 times brighter than the secondary.
The primary star is red in color, and the secondary star is blue-white.
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 02507+5554
| Property | Value |
|---|---|
| Star System Identifier | 02507+5554 |
| System Type | 7-star Star System |
| Primary Star | eta Per |
| Right Ascension (RA) | 2.84494 (02h 50m 41s") |
| Declination (Dec) | 55.8955 (55° 53' 43s) |
| Magnitude (Primary) | 3.76 |
| Magnitude (Secondary) | 8.50 |
| Spectral Type (Primary/Secondary) | M3I+B9V (red/blue-white) |
| Separation (Arcseconds) | 26.0 |
| Position Angle | 290° |
| Discovery Year | 1779 |
| Last Observed | 2018 |
| Primary Proper Motion (Ra, Dec) | +016-014 |
| Secondary Proper Motion (Ra, Dec) | +016-014 |
| Number of Observations | 58 |
02507+5554 Components
| Component | Magnitude | Separation (arcseconds) | Position Angle |
| AB | 8.50 | 26.0 | 290 |
| AC | 11.61 | 67.0 | 268 |
| AE | 9.24 | 239.0 | 296 |
| AF | 11.44 | 58.0 | 29 |
| CD | 12.7 | 5.2 | 114 |
| CG | 14.0 | 15.8 | 229 |
Notes
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 eta Per
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| Object name | 02507+5554 |
| Field of view | |
| Limiting magnitude | |
| 02507+5554 coordinates | 2.84494, 55.8955 |
| Center coordinates | 2.84494, 55.8955 |
02507+5554 Passage Through Night
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Current position of 02507+5554
| Time | 06:32 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| 02507+5554 elevation | 54° |
| 02507+5554 Azimuth | -47° |
Here you can see the current position of the 02507+5554 on the map, as well as its positions for rise and set. This tool allows you to track the 02507+5554's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 02507+5554
| Date | Mon, 30 June 2025 |
| Twighlight start | 23:02 |
| Twighlight end | 03:59 |
| Twighlight duration | 5h 56m |
| Rise | 02507+5554 is always up |
| Set | 02507+5554 is always up |
| Elevation at transit | 74° |
| Transit time | 09:47 |
| Equatorial coordinates | RA: 02h 50m 41s", Dec: 55° 53' 43s |
| Magnitude | 4 |
| Constellation | Perseus |
The graph illustrates the annual visibility pattern of a 02507+5554, 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 02507+5554 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 02507+5554 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.