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Sky-Tonight.com / Double Stars / 21520+5548 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: Columbus, United States
Timezone:
Latitude:
39.9625
Longitude:
-83.0061

Double Star 21520+5548 Observation Details

21520+5548

21520+5548 Daily Motion

21520+5548 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 21520+5548, when it reaches its highest elevation, in the annual motion section.
21520+5548 will be visible throughout the entire year. However, it will change its position significantly, moving 68 degrees over time. You can find the best times to observe 21520+5548, when it reaches its highest elevation, in the annual motion section.

21520+5548 Visibility Timetable on May 10

21520+5548 Rise and Set Timetable

TimeElevation
21520+5548 is always above the horizon
Moon Rise, 93.2% illuminated17:5910°
Sunset20:336°
Civil sunset21:056°
Astrosession begin22:2210°
21520+5548 is always above the horizon
Astrosession end04:3352°
Moon Set05:0556°
Civil sunrise05:5162°
Sunrise06:2266°
21520+5548 transit08:0974°

Track 21520+5548 Position Throughout the Night

← Sat, 10 May 2025 →

Elevation (degrees)
Time
Altitude
Azimuth
Shift the map to change the time and observe 21520+5548 changing position in the night sky.

21520+5548 Star System Description

21520+5548 is Triple Star System located in constellation Cepheus at coordinates RA: 21h 52m 00s", Dec: 55° 47' 48s.
The primary component has a magnitude of 5.64, while the secondary component has a magnitude of 6.42. They are separated by 21.1 arcseconds at a position angle of 192 degrees. The brightness difference between the two components is 0.78 magnitudes, with the primary component being approximately 2.1 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 21520+5548

Property Value
Star System Identifier 21520+5548
System Type Triple Star System
Primary Star Cep-21520 5548
Right Ascension (RA) 21.86694 (21h 52m 00s")
Declination (Dec) 55.79675 (55° 47' 48s)
Magnitude (Primary) 5.64
Magnitude (Secondary) 6.42
Spectral Type (Primary/Secondary) B6IV-V
Separation (Arcseconds) 21.1
Position Angle 192°
Discovery Year 1782
Last Observed 2018
Primary Proper Motion (Ra, Dec) +019-001
Secondary Proper Motion (Ra, Dec) +013+013
Number of Observations 111

21520+5548 Components

ComponentMagnitudeSeparation (arcseconds)Position Angle
AB6.4221.1192
AC13.155.2348

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

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Object name21520+5548
Field of view
Limiting magnitude
21520+5548 coordinates21.86694, 55.79675
Center coordinates21.86694, 55.79675

21520+5548 Passage Through Night

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Current position of 21520+5548

Time10:57
Latitude39.9625
Longitude-83.0061
21520+5548 elevation59°
21520+5548 Azimuth46°
Here you can see the current position of the 21520+5548 on the map, as well as its positions for rise and set. This tool allows you to track the 21520+5548's movement throughout the night, providing you with accurate and up-to-date information.

Annual motion of 21520+5548

Time
DateSat, 10 May 2025
Twighlight start22:18
Twighlight end04:28
Twighlight duration6h 10m
Rise21520+5548 is always up
Set21520+5548 is always up
Elevation at transit74°
Transit time08:09
Equatorial coordinatesRA: 21h 52m 00s", Dec: 55° 47' 48s
Magnitude6
ConstellationCepheus
The graph illustrates the annual visibility pattern of a 21520+5548, 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 21520+5548 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.