10306 5559 Position and Visibility Tonight
Where is 10306+5559 right now?
10306+5559 is located in the constellation Ursa Major. Although 10306+5559 is currently 55° above the horizon, it is not visible because it is daytime.
Twilight begins at 18:02 local time. At that moment, 10306+5559 will be 14° above the horizon toward the north-west.
Twilight begins at 18:02 local time. At that moment, 10306+5559 will be 14° above the horizon toward the north-west.
10306+5559 visibility on 2026-09-22
10306+5559 Visible all night
10306+5559 rise and set timetable
| Time | Elevation | |
| 10306+5559 is always above the horizon | ||
| 10306+5559 transit | 09:35 | 71° |
Moonrise, 69.9% illuminated  | 14:39 | 38° |
| Sunset | 17:04 | 19° |
| Civil sunset | 17:32 | 17° |
| Twilight start (−12°) | 18:02 | 14° |
| Astronomical observing session begins | 18:33 | 11° |
| 10306+5559 is always above the horizon | ||
| Moonset | 00:43 | 12° |
| Astronomical observing session ends | 03:28 | 30° |
| Twilight end (−12°) | 03:59 | 34° |
| Civil sunrise | 04:29 | 38° |
| Sunrise | 04:57 | 42° |
Track 10306+5559 position throughout the night
← 22 September 2026 →
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Star system description: 10306+5559
System 10306+5559 — triple star system, is located in the constellation Ursa Major, at coordinates RA: 10h 30m 37s", Dec: 55° 58' 49s.
The primary and secondary magnitudes are 4.88 and 8.86. Their separation is 2 arcminutes, at position angle 303°. The magnitude difference is 3.98 magnitudes; the primary is approximately 39.1 times brighter.
The primary is yellow-white; the secondary is orange.
The following technical data come from the Washington Double Star Catalog.
V: Proper motion indicates a physical pair.
The primary and secondary magnitudes are 4.88 and 8.86. Their separation is 2 arcminutes, at position angle 303°. The magnitude difference is 3.98 magnitudes; the primary is approximately 39.1 times brighter.
The primary is yellow-white; the secondary is orange.
The following technical data come from the Washington Double Star Catalog.
Technical details: 10306+5559
| Property | Value |
|---|---|
| System identifier | 10306+5559 |
| System type | triple star system |
| Primary star | 36 UMa |
| Right ascension (RA) | 10.51042 (10h 30m 37s") |
| Declination (Dec) | 55.98053 (55° 58' 49s) |
| Primary magnitude | 4.88 |
| Secondary magnitude | 8.86 |
| Spectral type (primary/secondary) | F8V+K7V (yellow-white/orange) |
| Separation (arcseconds) | 122.5 |
| Position angle | 303° |
| Discovery year | 1905 |
| Last observed | 2016 |
| Primary proper motion (RA, Dec) | -177-033 |
| Secondary proper motion (RA, Dec) | -182-031 |
| Number of observations | 22 |
Components of 10306+5559
| Component | Magnitude | Separation (arcseconds) | Position angle |
| AB | 8.86 | 122.5 | 303 |
| AC | 11.44 | 242.3 | 291 |
Notes
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 10306+5559
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| Object name | 10306+5559 |
| Field of view | |
| Limiting magnitude | |
| 10306+5559 coordinates | 10.51042, 55.98053 |
| Center coordinates | 10.51042, 55.98053 |
10306 5559 Passage Through Night
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Current position of 10306 5559
| Time | 06:40 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 55° |
| Azimuth | 43° |
Here you can see the current position of 10306 5559 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 10306 5559 Visible Throughout the Year?
10306+5559 will remain visible until July 26, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Tue, 22 September 2026 |
| Astronomical observing session begins | 18:29 |
| Astronomical observing session ends | 03:21 |
| Astronomical observing duration | 9h 53m |
| Rise | 10306 5559 is always up |
| Set | 10306 5559 is always up |
| Elevation at transit | 71° |
| Transit time | 09:31 |
| Equatorial coordinates | RA: 10h 30m 37s", Dec: 55° 58' 49s |
| Magnitude | 5 |
| Constellation | Ursa Major |
The graph illustrates the annual visibility pattern of 10306 5559, 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 10306 5559 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 10306 5559 is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 10306+5559
Coordinates and Visibility
| Right Ascension | 10h 30m 38s |
| Declination | 55° 58′ 50″ |
| Magnitude | 4.88 |
| Constellation | Ursa Major |
| Elevation | 55.4° |
| Azimuth | 43.1° |