15155+3319 Position and Visibility Tonight
Where is 15155+3319 right now?
15155+3319 is located in the constellation Bootes. Although 15155+3319 is currently 65° above the horizon, it is not visible because it is daytime.
Twilight begins at 18:05 local time. At that moment, 15155+3319 will be 46° above the horizon toward the north-west.
Twilight begins at 18:05 local time. At that moment, 15155+3319 will be 46° above the horizon toward the north-west.
15155+3319 visibility on 2026-09-20
15155+3319 Visible from sunset until before midnight
15155+3319 rise and set timetable
| Time | Elevation | |
Moonrise, 51.4% illuminated  | 13:23 | 76° |
| 15155+3319 transit | 14:27 | 86° |
| Sunset | 17:07 | 57° |
| Civil sunset | 17:35 | 52° |
| Twilight start (−12°) | 18:05 | 46° |
| Astronomical observing session begins | 18:36 | 40° |
| 15155+3319 set | 22:26 | |
| Moonset | 22:40 | -2° |
| Astronomical observing session ends | 03:26 | -18° |
| 15155+3319 rise | 06:24 |
Track 15155+3319 position throughout the night
← 20 September 2026 →
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Star system description: 15155+3319
System 15155+3319 — triple star system, is located in the constellation Bootes, at coordinates RA: 15h 15m 30s", Dec: 33° 18' 53s.
The primary and secondary magnitudes are 3.56 and 7.89. Their separation is 2.3 arcminutes, at position angle 84°. The magnitude difference is 4.33 magnitudes; the primary is approximately 54 times brighter.
Both components are yellow.
The following technical data come from the Washington Double Star Catalog.
The primary and secondary magnitudes are 3.56 and 7.89. Their separation is 2.3 arcminutes, at position angle 84°. The magnitude difference is 4.33 magnitudes; the primary is approximately 54 times brighter.
Both components are yellow.
The following technical data come from the Washington Double Star Catalog.
Technical details: 15155+3319
| Property | Value |
|---|---|
| System identifier | 15155+3319 |
| System type | triple star system |
| Primary star | 49 Boo |
| Right ascension (RA) | 15.25836 (15h 15m 30s") |
| Declination (Dec) | 33.31483 (33° 18' 53s) |
| Primary magnitude | 3.56 |
| Secondary magnitude | 7.89 |
| Spectral type (primary/secondary) | G8III+G0V (yellow/yellow) |
| Separation (arcseconds) | 135.0 |
| Position angle | 84° |
| Discovery year | 1780 |
| Last observed | 2023 |
| Primary proper motion (RA, Dec) | +085-112 |
| Secondary proper motion (RA, Dec) | +082-110 |
| Number of observations | 129 |
Components of 15155+3319
| Component | Magnitude | Separation (arcseconds) | Position angle |
| AB | 7.89 | 135.0 | 84 |
| AC | 14.30 | 92.4 | 5 |
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 15155+3319
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| Object name | 15155+3319 |
| Field of view | |
| Limiting magnitude | |
| 15155+3319 coordinates | 15.25836, 33.31483 |
| Center coordinates | 15.25836, 33.31483 |
15155+3319 Passage Through Night
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Current position of 15155+3319
| Time | 12:27 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 65° |
| Azimuth | 90° |
Here you can see the current position of 15155+3319 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 15155+3319 Visible Throughout the Year?
15155+3319 will remain visible until October 24, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Sun, 20 September 2026 |
| Astronomical observing session begins | 18:32 |
| Astronomical observing session ends | 03:20 |
| Astronomical observing duration | 9h 48m |
| Rise | 06:24 |
| Set | 22:23 |
| Elevation at transit | 86° |
| Transit time | 14:23 |
| Equatorial coordinates | RA: 15h 15m 30s", Dec: 33° 18' 53s |
| Magnitude | 4 |
| Constellation | Bootes |
The graph illustrates the annual visibility pattern of 15155+3319, 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 15155+3319 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 15155+3319 is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 15155+3319
Coordinates and Visibility
| Right Ascension | 15h 15m 30s |
| Declination | 33° 18′ 53″ |
| Magnitude | 3.56 |
| Constellation | Bootes |
| Elevation | 65.1° |
| Azimuth | 90.2° |