09521 5404 Position and Visibility Tonight
Where is 09521+5404 right now?
09521+5404 is located in the constellation Ursa Major. It is currently above the horizon at an altitude of 15° toward the north-east, with an apparent magnitude of 5.28.
Twilight begins at 23:17 local time. At that moment, 09521+5404 will be 15° above the horizon toward the north-east.
Twilight begins at 23:17 local time. At that moment, 09521+5404 will be 15° above the horizon toward the north-east.
09521+5404 visibility on 2026-10-17
09521+5404 Visible from sunset until before midnight
09521+5404 rise and set timetable
| Time | Elevation | |
| 09521+5404 is always above the horizon | ||
| 09521+5404 transit | 07:19 | 73° |
Moonrise, 25.9% illuminated  | 11:16 | 47° |
| Sunset | 16:27 | 8° |
| Civil sunset | 16:55 | 6° |
| Twilight start (−12°) | 17:25 | 5° |
| Astronomical observing session begins | 17:55 | 3° |
| 09521+5404 is always above the horizon | ||
| Moonset | 20:29 | 3° |
| Astronomical observing session ends | 03:51 | 52° |
| Twilight end (−12°) | 04:21 | 56° |
| Civil sunrise | 04:51 | 60° |
| Sunrise | 05:19 | 64° |
Track 09521+5404 position throughout the night
← 17 October 2026 →
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Star system description: 09521+5404
System 09521+5404 — double star system, is located in the constellation Ursa Major, at coordinates RA: 09h 52m 06s", Dec: 54° 03' 51s.
The primary and secondary magnitudes are 5.28 and 5.39. Their separation is 0.4 arcseconds, at position angle 4°. The magnitude difference is 0.11 magnitudes; the primary is approximately 1.1 times brighter.
The following technical data come from the Washington Double Star Catalog.
The primary and secondary magnitudes are 5.28 and 5.39. Their separation is 0.4 arcseconds, at position angle 4°. The magnitude difference is 0.11 magnitudes; the primary is approximately 1.1 times brighter.
The following technical data come from the Washington Double Star Catalog.
Technical details: 09521+5404
| Property | Value |
|---|---|
| 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) |
| Primary magnitude | 5.28 |
| Secondary magnitude | 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 |
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 09521+5404
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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 | 23:17 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 15° |
| Azimuth | 32° |
Here you can see the current position of 09521 5404 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.
When Is 09521 5404 Visible Throughout the Year?
09521+5404 will remain visible until July 12, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Sun, 18 October 2026 |
| Astronomical observing session begins | 17:50 |
| Astronomical observing session ends | 03:45 |
| Astronomical observing duration | 10h 55m |
| Rise | 09521 5404 is always up |
| Set | 09521 5404 is always up |
| Elevation at transit | 73° |
| Transit time | 07:11 |
| Equatorial coordinates | RA: 09h 52m 06s", Dec: 54° 03' 51s |
| Magnitude | 5 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of 09521 5404, 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 see when 09521 5404 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 09521 5404 is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 09521+5404
Coordinates and Visibility
| Right Ascension | 09h 52m 06s |
| Declination | 54° 03′ 51″ |
| Magnitude | 5.28 |
| Constellation | Ursa Major |
| Elevation | 15° |
| Azimuth | 31.8° |