02507+5554 Position and Visibility Tonight
Where is 02507+5554 right now?
02507+5554 is located in the constellation Perseus. Although 02507+5554 is currently 62° above the horizon, it is not visible because it is daytime.
Twilight begins at 18:44 local time. At that moment, 02507+5554 will be 11° above the horizon toward the north-east.
Twilight begins at 18:44 local time. At that moment, 02507+5554 will be 11° above the horizon toward the north-east.
02507+5554 visibility on 2026-08-27
02507+5554 Visible all night
02507+5554 rise and set timetable
| Time | Elevation | |
| 02507+5554 is always above the horizon | ||
Moonrise, 98.6% illuminated  | 17:09 | 5° |
| Sunset | 17:43 | 7° |
| Civil sunset | 18:11 | 9° |
| Twilight start | 18:44 | 11° |
| Astronomical observing session begins | 19:17 | 14° |
| 02507+5554 is always above the horizon | ||
| Astronomical observing session ends | 03:01 | 71° |
| Twilight end | 03:35 | 71° |
| 02507+5554 transit | 03:35 | 71° |
| Moonset | 04:01 | 71° |
| Civil sunrise | 04:07 | 71° |
| Sunrise | 04:35 | 69° |
Track 02507+5554 Position Throughout the Night
← 27 August 2026 →
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| Altitude | |
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Shift the map to change the time and observe 02507+5554 changing position in the night sky.
Star system description: 02507+5554
System 02507+5554 — 7-star system, is located in the constellation Perseus, at coordinates RA: 02h 50m 41s", Dec: 55° 53' 43s.
The primary and secondary magnitudes are 3.76 and 8.50. Their separation is 26 arcseconds, at position angle 290°. The magnitude difference is 4.74 magnitudes; the primary is approximately 78.7 times brighter.
The primary is red; the secondary is blue-white.
The following technical data come from the Washington Double Star Catalog.
T: Matching parallax and similar proper motion indicate a physical pair.
The primary and secondary magnitudes are 3.76 and 8.50. Their separation is 26 arcseconds, at position angle 290°. The magnitude difference is 4.74 magnitudes; the primary is approximately 78.7 times brighter.
The primary is red; the secondary is blue-white.
The following technical data come from the Washington Double Star Catalog.
Technical details: 02507+5554
| Property | Value |
|---|---|
| System identifier | 02507+5554 |
| System type | 7-star system |
| Primary star | eta Per |
| Right ascension (RA) | 2.84494 (02h 50m 41s") |
| Declination (Dec) | 55.8955 (55° 53' 43s) |
| Primary magnitude | 3.76 |
| Secondary magnitude | 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 |
Components of 02507+5554
| 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
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for eta Per
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| Object name | eta Per |
| Field of view | |
| Limiting magnitude | |
| eta Per 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 | 05:44 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 62° |
| Azimuth | 322° |
Here you can see the current position of 02507+5554 on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.
Annual motion of 02507+5554
02507+5554 will remain visible until April 13, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Thu, 27 August 2026 |
| Twilight start | 19:13 |
| Twilight end | 02:55 |
| Twilight duration | 8h 42m |
| Rise | 02507+5554 is always up |
| Set | 02507+5554 is always up |
| Elevation at transit | 71° |
| Transit time | 03:35 |
| Equatorial coordinates | RA: 02h 50m 41s", Dec: 55° 53' 43s |
| Magnitude | 4 |
| Constellation | Perseus |
The graph illustrates the annual visibility pattern of 02507+5554, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 02507+5554
Coordinates and Visibility
| Right Ascension | 2.84494° |
| Declination | 55.8955° |
| Magnitude | 3.76 |
| Constellation | Perseus |
| Elevation | 62° |
| Azimuth | 321.6° |