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Sky-Tonight.com / Double Stars / 20155+4743 Star System
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Observation Settings

Or select it on the map:
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: Santa Clara, United States
Timezone:
Latitude:
37.3541
Longitude:
-121.955

Double Star 20155+4743 Observation Details

20155+4743

20155+4743 Daily Motion

20155+4743 will reach transit at 18:23. By the time twilight starts at 01:28 it will be at an elevation of 17° degrees and will set at 04:09, before twilight ends.
20155+4743 will be visible until January, 18, 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.

20155+4743 Visibility Timetable on October 06

20155+4743 Rise and Set Timetable

TimeElevation
Moon Rise, 98.2% illuminated15:5762°
Sunset16:4369°
Civil sunset17:1073°
Astrosession begin18:1079°
20155+4743 transit18:2380°
Astrosession end03:412°
20155+4743 set04:09
Moon Set04:33-2°
20155+4743 rise08:32

Track 20155+4743 Position Throughout the Night

← Mon, 6 October 2025 →

Elevation (degrees)
Time
Altitude
Azimuth
Shift the map to change the time and observe 20155+4743 changing position in the night sky.

Where is 20155+4743 right now?

20155+4743 is located in the constellation Cygnus, at right ascension 20h 15m 28s" and declination 47° 42' 51s. At the current time, it is above the horizon at an altitude of 17 degrees toward the northeast from your location, with an apparent magnitude of 4.16.

20155+4743 Star System Description

20155+4743 is Double Star System located in constellation Cygnus at coordinates RA: 20h 15m 28s", Dec: 47° 42' 51s.
The primary component has a magnitude of 4.16, while the secondary component has a magnitude of 8.36. They are separated by 3.5 arcminutes at a position angle of 175 degrees. The brightness difference between the two components is 4.2 magnitudes, with the primary component being approximately 47.9 times brighter than the secondary.
The primary star is orange in color, and the secondary star is blue-white.
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 20155+4743

Property Value
Star System Identifier 20155+4743
System Type Double Star System
Primary Star 32 Cyg
Right Ascension (RA) 20.25786 (20h 15m 28s")
Declination (Dec) 47.71422 (47° 42' 51s)
Magnitude (Primary) 4.16
Magnitude (Secondary) 8.36
Spectral Type (Primary/Secondary) K7Ib+B6V (orange/blue-white)
Separation (Arcseconds) 208.9
Position Angle 175°
Discovery Year 1824
Last Observed 2015
Primary Proper Motion (Ra, Dec) +000-002
Secondary Proper Motion (Ra, Dec) +004+005
Number of Observations 13

Notes

  • S: Statistically different parallax and proper motion indicates that this pair is non-physical.
  • 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 32 Cyg

    Double-click to unlock the map.
    Object name20155+4743
    Field of view
    Limiting magnitude
    20155+4743 coordinates20.25786, 47.71422
    Center coordinates20.25786, 47.71422

    20155+4743 Passage Through Night

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    Current position of 20155+4743

    Time01:28
    Latitude37.3541
    Longitude-121.955
    20155+4743 elevation17°
    20155+4743 Azimuth42°
    Here you can see the current position of the 20155+4743 on the map, as well as its positions for rise and set. This tool allows you to track the 20155+4743's movement throughout the night, providing you with accurate and up-to-date information.

    Annual motion of 20155+4743

    Time
    DateTue, 7 October 2025
    Twighlight start18:05
    Twighlight end03:35
    Twighlight duration10h 31m
    Rise08:32
    Set04:05
    Elevation at transit80°
    Transit time18:19
    Equatorial coordinatesRA: 20h 15m 28s", Dec: 47° 42' 51s
    Magnitude4
    ConstellationCygnus
    The graph illustrates the annual visibility pattern of a 20155+4743, 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 20155+4743 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.

    Astrometric & Physical Parameters of 20155+4743

    Coordinates & Visibility

    Right Ascension20.25786°
    Declination47.71422°
    Magnitude4.16
    ConstellationCygnus
    Elevation17.2°
    Azimuth42.4°