Double Star 18555-1623 Observation Details
18555-1623 Daily Motion
18555-1623 will reach its transit before twilight, at 15:40. By the onset of twilight at 17:13, it will be at elevation, and it will set before sunrise, at 20:48.18555-1623 will be visible until November, 4, 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.
18555-1623 Visibility Timetable on October 27
18555-1623 Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 23.5% illuminated | 10:29 | -1° |
| 18555-1623 transit | 15:40 | 36° |
| Sunset | 16:14 | 36° |
| Civil sunset | 16:42 | 34° |
| Astrosession begin | 17:43 | 29° |
| Moon Set | 19:34 | 13° |
| 18555-1623 set | 20:48 | |
| Astrosession end | 04:00 | -68° |
| 18555-1623 rise | 10:29 |
Track 18555-1623 Position Throughout the Night
← Mon, 27 October 2025 →
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Shift the map to change the time and observe 18555-1623 changing position in the night sky.
Where is 18555-1623 right now?
18555-1623 is located in the constellation Scutum, at right ascension 18h 55m 31s" and declination -16° 22' 35s. Although it is currently above the horizon at an altitude of 36 degrees, 18555-1623 is not visible because it is daytime.18555-1623 Star System Description
18555-1623 is Double Star System located in constellation Scutum at coordinates RA: 18h 55m 31s", Dec: -16° 22' 35s.
The primary component has a magnitude of 4.7, while the secondary component has a magnitude of 9.1. They are separated by 17.7 arcseconds at a position angle of 142 degrees. The brightness difference between the two components is 4.4 magnitudes, with the primary component being approximately 57.5 times brighter than the secondary.
The primary star is yellow-white in color, and the secondary star is red.
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.
V: Proper motion or other technique indicates that this pair is physical.
The primary component has a magnitude of 4.7, while the secondary component has a magnitude of 9.1. They are separated by 17.7 arcseconds at a position angle of 142 degrees. The brightness difference between the two components is 4.4 magnitudes, with the primary component being approximately 57.5 times brighter than the secondary.
The primary star is yellow-white in color, and the secondary star is red.
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 18555-1623
| Property | Value |
|---|---|
| Star System Identifier | 18555-1623 |
| System Type | Double Star System |
| Primary Star | Sct-18555-1623 |
| Right Ascension (RA) | 18.92528 (18h 55m 31s") |
| Declination (Dec) | -16.37658 (-16° 22' 35s) |
| Magnitude (Primary) | 4.7 |
| Magnitude (Secondary) | 9.1 |
| Spectral Type (Primary/Secondary) | F5V+M1 (yellow-white/red) |
| Separation (Arcseconds) | 17.7 |
| Position Angle | 142° |
| Discovery Year | 1998 |
| Last Observed | 2016 |
| Primary Proper Motion (Ra, Dec) | -028-184 |
| Secondary Proper Motion (Ra, Dec) | -037-180 |
| Number of Observations | 5 |
Notes
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 name | 18555-1623 |
| Field of view | |
| Limiting magnitude | |
| 18555-1623 coordinates | 18.92528, -16.37658 |
| Center coordinates | 18.92528, -16.37658 |
18555-1623 Passage Through Night
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Current position of 18555-1623
| Time | 15:26 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| 18555-1623 elevation | 36° |
| 18555-1623 Azimuth | -176° |
Here you can see the current position of the 18555-1623 on the map, as well as its positions for rise and set. This tool allows you to track the 18555-1623's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 18555-1623
| Date | Tue, 28 October 2025 |
| Twighlight start | 17:42 |
| Twighlight end | 03:58 |
| Twighlight duration | 10h 16m |
| Rise | 10:29 |
| Set | 20:44 |
| Elevation at transit | 36° |
| Transit time | 15:36 |
| Equatorial coordinates | RA: 18h 55m 31s", Dec: -16° 22' 35s |
| Magnitude | 5 |
| Constellation | Scutum |
The graph illustrates the annual visibility pattern of a 18555-1623, 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 18555-1623 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.
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 18555-1623 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 18555-1623
Coordinates & Visibility
| Right Ascension | 18.92528° |
| Declination | -16.37658° |
| Magnitude | 4.7 |
| Constellation | Scutum |
| Elevation | 36.2° |
| Azimuth | -175.8° |