18555-1623 Position and Visibility Tonight
Where is 18555-1623 right now?
18555-1623 is located in the constellation Scutum. It is currently above the horizon at an altitude of 34° toward the south-west, with an apparent magnitude of 4.7.
Twilight begins at 18:17 local time. At that moment, 18555-1623 will be 34° above the horizon toward the south-west.
Twilight begins at 18:17 local time. At that moment, 18555-1623 will be 34° above the horizon toward the south-west.
18555-1623 visibility on 2026-10-03
18555-1623 Visible from sunset until before midnight
18555-1623 rise and set timetable
| Time | Elevation | |
| 18555-1623 rise | 12:08 | |
| Sunset | 16:47 | 36° |
| Civil sunset | 17:15 | 36° |
| 18555-1623 transit | 17:16 | 36° |
| Twilight start (−12°) | 17:45 | 36° |
| Astronomical observing session begins | 18:15 | 34° |
Moonrise, 56.5% illuminated  | 21:14 | 12° |
| 18555-1623 set | 22:23 | |
| Astronomical observing session ends | 03:38 | -60° |
| Moonset | 12:53 | 9° |
Track 18555-1623 position throughout the night
← 3 October 2026 →
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Shift the map to change the time and observe 18555-1623 changing position in the night sky.
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 4.70 and 9.10. 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 4.70 and 9.10. 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 | 4.70 |
| Secondary magnitude | 9.10 |
| 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 18555-1623
18555-1623 Passage Through Night
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Current position of 18555-1623
| Time | 18:17 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 34° |
| Azimuth | 198° |
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.
When Is 18555-1623 Visible Throughout the Year?
18555-1623 will remain visible until November 4, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Sun, 4 October 2026 |
| Astronomical observing session begins | 18:13 |
| Astronomical observing session ends | 03:36 |
| Astronomical observing duration | 9h 23m |
| Rise | 12:04 |
| Set | 22:19 |
| Elevation at transit | 36° |
| Transit time | 17:12 |
| 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 see when 18555-1623 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 18555-1623 is visible throughout the year 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 | 18h 55m 31s |
| Declination | -16° 22′ 36″ |
| Magnitude | 4.7 |
| Constellation | Scutum |
| Elevation | 34.4° |
| Azimuth | 197.9° |