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Sky-Tonight.com / Double Stars / 12021+4303 Star System
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Observation Settings

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This Earth map fragment is intended to illustrate celestial motion across the sky, emphasizing both bearing and elevational perspectives. The map's center point corresponds to the transit, showcasing celestial objects at their highest point, while elevation gradually decreases towards the map edges. This dynamic representation offers insights into the changing positions of celestial bodies with a focus on their bearing and elevational trajectories.
Your location: Ashburn, United States
Timezone:
Latitude:
39.0469
Longitude:
-77.4903

Double Star 12021+4303 Observation Details

12021+4303

12021+4303 Daily Motion

12021+4303 will reach its transit before twilight, at 21:16. By the onset of twilight at 21:29, it will be at 85° elevation, and it will set before after, at 06:31.
12021+4303 will be visible until August, 16, 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.

12021+4303 Visibility Timetable on May 21

12021+4303 Rise and Set Timetable

TimeElevation
Sunset20:1979°
Civil sunset20:5184°
12021+4303 transit21:1686°
Astrosession begin22:1179°
Moon Rise, 41.7% illuminated02:3133°
Astrosession end04:0118°
Civil sunrise05:218°
Sunrise05:534°
12021+4303 set06:31
12021+4303 rise11:56
Moon Set14:0515°

Track 12021+4303 Position Throughout the Night

← Wed, 21 May 2025 →

Elevation (degrees)
Time
Altitude
Azimuth
Shift the map to change the time and observe 12021+4303 changing position in the night sky.

12021+4303 Star System Description

12021+4303 is 7-star Star System located in constellation Ursa Major at coordinates RA: 12h 02m 06s", Dec: 43° 02' 44s.
The primary component has a magnitude of 5.24, while the secondary component has a magnitude of 6.72. They are separated by 5.3 arcminutes at a position angle of 51 degrees. The brightness difference between the two components is 1.48 magnitudes, with the primary component being approximately 3.9 times brighter than the secondary.
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 12021+4303

Property Value
Star System Identifier 12021+4303
System Type 7-star Star System
Primary Star 67 UMa
Right Ascension (RA) 12.03522 (12h 02m 06s")
Declination (Dec) 43.04564 (43° 02' 44s)
Magnitude (Primary) 5.24
Magnitude (Secondary) 6.72
Spectral Type (Primary/Secondary) A7m
Separation (Arcseconds) 315.0
Position Angle 51°
Discovery Year 1897
Last Observed 2015
Primary Proper Motion (Ra, Dec) -327+072
Secondary Proper Motion (Ra, Dec) -347-512
Number of Observations 15

12021+4303 Components

ComponentMagnitudeSeparation (arcseconds)Position Angle
AB6.72315.051
AC8.47369.319
AD8.91409.2269
BC8.47194.8321
Da,Db12.320.686
Da,Dc.0.331

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 67 UMa

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Object name12021+4303
Field of view
Limiting magnitude
12021+4303 coordinates12.03522, 43.04564
Center coordinates12.03522, 43.04564

12021+4303 Passage Through Night

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Current position of 12021+4303

Time08:27
Latitude39.0469
Longitude-77.4903
12021+4303 elevation-7°
12021+4303 Azimuth9°
Here you can see the current position of the 12021+4303 on the map, as well as its positions for rise and set. This tool allows you to track the 12021+4303's movement throughout the night, providing you with accurate and up-to-date information.

Annual motion of 12021+4303

Time
DateWed, 21 May 2025
Twighlight start22:07
Twighlight end03:56
Twighlight duration6h 49m
Rise12:00
Set06:31
Elevation at transit86°
Transit time21:16
Equatorial coordinatesRA: 12h 02m 06s", Dec: 43° 02' 44s
Magnitude5
ConstellationUrsa Major
The graph illustrates the annual visibility pattern of a 12021+4303, 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 12021+4303 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.