15038+4739 Position and Visibility Tonight
Where is 15038+4739 right now?
15038+4739 is located in the constellation Bootes. Although 15038+4739 is currently 13° above the horizon, it is not visible because it is daytime.
Twilight begins at 18:57 local time. At that moment, 15038+4739 will be 60° above the horizon toward the north-west.
Twilight begins at 18:57 local time. At that moment, 15038+4739 will be 60° above the horizon toward the north-west.
15038+4739 visibility on 2026-08-18
15038+4739 Visible from sunset until early morning
15038+4739 rise and set timetable
| Time | Elevation | |
Moonrise, 21% illuminated  | 09:49 | 21° |
| 15038+4739 transit | 16:25 | 80° |
| Sunset | 17:55 | 71° |
| Civil sunset | 18:24 | 66° |
| Twilight start | 18:57 | 60° |
| Astronomical observing session begins | 19:32 | 55° |
| Moonset | 20:26 | 46° |
| 15038+4739 set | 02:11 | |
| Astronomical observing session ends | 02:51 | -3° |
| 15038+4739 rise | 06:36 |
Track 15038+4739 Position Throughout the Night
← 18 August 2026 →
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Star system description: 15038+4739
System 15038+4739 — double star system, is located in the constellation Bootes, at coordinates RA: 15h 03m 47s", Dec: 47° 39' 14s.
The primary and secondary magnitudes are 5.20 and 6.10. Their separation is 1.5 arcseconds, at position angle 228°. The magnitude difference is 0.9 magnitudes; the primary is approximately 2.3 times brighter.
The primary is yellow-white; the secondary is orange.
The following technical data come from the Washington Double Star Catalog.
The primary and secondary magnitudes are 5.20 and 6.10. Their separation is 1.5 arcseconds, at position angle 228°. The magnitude difference is 0.9 magnitudes; the primary is approximately 2.3 times brighter.
The primary is yellow-white; the secondary is orange.
The following technical data come from the Washington Double Star Catalog.
Technical details: 15038+4739
| Property | Value |
|---|---|
| System identifier | 15038+4739 |
| System type | double star system |
| Primary star | 44 Boo |
| Right ascension (RA) | 15.06314 (15h 03m 47s") |
| Declination (Dec) | 47.65406 (47° 39' 14s) |
| Primary magnitude | 5.20 |
| Secondary magnitude | 6.10 |
| Spectral type (primary/secondary) | F7V+K4V (yellow-white/orange) |
| Separation (arcseconds) | 1.5 |
| Position angle | 228° |
| Discovery year | 1819 |
| Last observed | 2022 |
| Primary proper motion (RA, Dec) | -444+010 |
| Secondary proper motion (RA, Dec) | -374+039 |
| Number of observations | 863 |
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 44 Boo
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| Object name | 44 Boo |
| Field of view | |
| Limiting magnitude | |
| 44 Boo coordinates | 15.06314, 47.65406 |
| Center coordinates | 15.06314, 47.65406 |
15038+4739 Passage Through Night
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Current position of 15038+4739
| Time | 08:46 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 13° |
| Azimuth | 39° |
Here you can see the current position of 15038+4739 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 15038+4739
15038+4739 will remain visible until November 1, 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 | 06:36 |
| Set | 02:07 |
| Elevation at transit | 80° |
| Transit time | 16:21 |
| Equatorial coordinates | RA: 15h 03m 47s", Dec: 47° 39' 14s |
| Magnitude | 5 |
| Constellation | Bootes |
The graph illustrates the annual visibility pattern of 15038+4739, 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 15038+4739
Coordinates and Visibility
| Right Ascension | 15.06314° |
| Declination | 47.65406° |
| Magnitude | 5.20 |
| Constellation | Bootes |
| Elevation | 12.7° |
| Azimuth | 38.7° |