18555-1623 Position and Visibility Tonight
Where is 18555-1623 right now?
18555-1623 is located in the constellation Scutum. It is currently below the horizon and is not visible from your location.
Twilight begins at 18:57 local time. At that moment, 18555-1623 will be 33° above the horizon toward the south-east.
Twilight begins at 18:57 local time. At that moment, 18555-1623 will be 33° above the horizon toward the south-east.
18555-1623 visibility on 2026-08-18
18555-1623 Visible from sunset until early morning
18555-1623 rise and set timetable
| Time | Elevation | |
Moonrise, 21% illuminated  | 09:49 | -61° |
| 18555-1623 rise | 15:09 | |
| Sunset | 17:55 | 27° |
| Civil sunset | 18:24 | 30° |
| Twilight start | 18:57 | 33° |
| Astronomical observing session begins | 19:32 | 35° |
| 18555-1623 transit | 20:16 | 36° |
| Moonset | 20:26 | 36° |
| 18555-1623 set | 01:24 | |
| Astronomical observing session ends | 02:51 | -17° |
Track 18555-1623 Position Throughout the Night
← 18 August 2026 →
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Star system description: 18555-1623
System 18555-1623 — double star system, is located in the constellation Scutum, at coordinates RA: 18h 55m 31s", Dec: -16° 22' 35s.
The primary and secondary magnitudes are 4.7 and 9.1. Their separation is 17.7 arcseconds, at position angle 142°. The magnitude difference is 4.4 magnitudes; the primary is approximately 57.5 times brighter.
The primary is yellow-white; the secondary is red.
The following technical data come from the Washington Double Star Catalog.
V: Proper motion indicates a physical pair.
The primary and secondary magnitudes are 4.7 and 9.1. Their separation is 17.7 arcseconds, at position angle 142°. The magnitude difference is 4.4 magnitudes; the primary is approximately 57.5 times brighter.
The primary is yellow-white; the secondary is red.
The following technical data come from the Washington Double Star Catalog.
Technical details: 18555-1623
| Property | Value |
|---|---|
| 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) |
| Primary magnitude | 4.7 |
| Secondary magnitude | 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
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for
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| Object name | |
| Field of view | |
| Limiting magnitude | |
| 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 | 08:46 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | -68° |
| Azimuth | 18° |
Here you can see the current position of 18555-1623 on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.
Annual motion of 18555-1623
18555-1623 will remain visible until November 4, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Tue, 18 August 2026 |
| Twilight start | 19:28 |
| Twilight end | 02:44 |
| Twilight duration | 7h 17m |
| Rise | 15:05 |
| Set | 01:20 |
| Elevation at transit | 36° |
| Transit time | 20:13 |
| Equatorial coordinates | RA: 18h 55m 31s", Dec: -16° 22' 35s |
| Magnitude | 5 |
| Constellation | Scutum |
The graph illustrates the annual visibility pattern of 18555-1623, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 18555-1623
Coordinates and Visibility
| Right Ascension | 18.92528° |
| Declination | -16.37658° |
| Magnitude | 4.7 |
| Constellation | Scutum |
| Elevation | -68.2° |
| Azimuth | 18° |