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Sky-Tonight.com / Double Stars / 18443+3940 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.
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Latitude:
37.751
Longitude:
-97.822

Double Star 18443+3940 Observation Details

18443+3940

18443+3940 Daily Motion


18443+3940 will be visible until December, 25, 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.

18443+3940 Visibility Timetable on May 10

18443+3940 Rise and Set Timetable

TimeElevation
Moon Rise, 93.4% illuminated17:58-12°
18443+3940 rise20:23
Sunset20:271°
Civil sunset20:584°
Astrosession begin22:1115°
Astrosession end04:4386°
18443+3940 transit05:0188°
Moon Set05:0888°
Civil sunrise05:5679°
Sunrise06:2773°

Track 18443+3940 Position Throughout the Night

← Sat, 10 May 2025 →

Elevation (degrees)
Time
Altitude
Azimuth
Shift the map to change the time and observe 18443+3940 changing position in the night sky.

18443+3940 Star System Description

18443+3940 is 20-star Star System located in constellation Lyra at coordinates RA: 18h 44m 20s", Dec: 39° 40' 12s.
The primary component has a magnitude of 5.15, while the secondary component has a magnitude of 6.10. They are separated by 4 arcseconds at a position angle of 45 degrees. The brightness difference between the two components is 0.95 magnitudes, with the primary component being approximately 2.4 times brighter than the secondary.
The primary star is white in color, and the secondary star is yellow-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 18443+3940

Property Value
Star System Identifier 18443+3940
System Type 20-star Star System
Primary Star eps 1 Lyr
Right Ascension (RA) 18.73897 (18h 44m 20s")
Declination (Dec) 39.67011 (39° 40' 12s)
Magnitude (Primary) 5.15
Magnitude (Secondary) 6.10
Spectral Type (Primary/Secondary) A4V+F1V (white/yellow-white)
Separation (Arcseconds) 4.0
Position Angle 45°
Discovery Year 1777
Last Observed 2023
Primary Proper Motion (Ra, Dec) +011+061
Secondary Proper Motion (Ra, Dec) +002+047
Number of Observations 654

18443+3940 Components

ComponentMagnitudeSeparation (arcseconds)Position Angle
AB6.104.045
AB,CD4.56207.3173
AD5.38209.0172
AI10.12145.4135
BC5.25210.6173
BD5.38212.2173
BI10.12145.5136
Ca,Cb.0.266
CD5.382.0180
CD,F12.794.5359
CD,G14.276.3294
CD,H13.996.6313
CE12.363.7333
CI10.12129.137
DI10.12126.436
EF12.745.041
EG14.242.6247
EI10.12109.168
GH13.925.0356

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 eps 1 Lyr

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Object name18443+3940
Field of view
Limiting magnitude
18443+3940 coordinates18.73897, 39.67011
Center coordinates18.73897, 39.67011

18443+3940 Passage Through Night

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Current position of 18443+3940

Time09:13
Latitude37.751
Longitude-97.822
18443+3940 elevation43°
18443+3940 Azimuth67°
Here you can see the current position of the 18443+3940 on the map, as well as its positions for rise and set. This tool allows you to track the 18443+3940's movement throughout the night, providing you with accurate and up-to-date information.

Annual motion of 18443+3940

Time
DateSat, 10 May 2025
Twighlight start22:07
Twighlight end04:38
Twighlight duration7h 31m
Rise20:23
Set13:40
Elevation at transit88°
Transit time05:01
Equatorial coordinatesRA: 18h 44m 20s", Dec: 39° 40' 12s
Magnitude5
ConstellationLyra
The graph illustrates the annual visibility pattern of a 18443+3940, 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 18443+3940 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.