21446 2539 Position and Visibility Tonight
Where is 21446+2539 right now?
21446+2539 is located in the constellation Pegasus. It is currently above the horizon at an altitude of 37° toward the west, with an apparent magnitude of 4.94.
Twilight begins at 23:17 local time. At that moment, 21446+2539 will be 37° above the horizon toward the west.
Twilight begins at 23:17 local time. At that moment, 21446+2539 will be 37° above the horizon toward the west.
21446+2539 visibility on 2026-10-17
21446+2539 Visible from sunset until early morning
21446+2539 rise and set timetable
| Time | Elevation | |
Moonrise, 25.9% illuminated  | 11:16 | -5° |
| 21446+2539 rise | 11:44 | |
| Sunset | 16:27 | 54° |
| Civil sunset | 16:55 | 59° |
| Twilight start (−12°) | 17:25 | 65° |
| Astronomical observing session begins | 17:55 | 70° |
| 21446+2539 transit | 19:09 | 78° |
| Moonset | 20:29 | 69° |
| 21446+2539 set | 02:34 | |
| Astronomical observing session ends | 03:51 | -12° |
Track 21446+2539 position throughout the night
← 17 October 2026 →
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Star system description: 21446+2539
System 21446+2539 — triple star system, is located in the constellation Pegasus, at coordinates RA: 21h 44m 38s", Dec: 25° 38' 42s.
The primary and secondary magnitudes are 4.94 and 5.04. Their separation is 0.3 arcseconds, at position angle 138°. The magnitude difference is 0.1 magnitudes; the primary is approximately 1.1 times brighter.
The following technical data come from the Washington Double Star Catalog.
The primary and secondary magnitudes are 4.94 and 5.04. Their separation is 0.3 arcseconds, at position angle 138°. The magnitude difference is 0.1 magnitudes; the primary is approximately 1.1 times brighter.
The following technical data come from the Washington Double Star Catalog.
Technical details: 21446+2539
| Property | Value |
|---|---|
| System identifier | 21446+2539 |
| System type | triple star system |
| Primary star | kap Peg |
| Right ascension (RA) | 21.74408 (21h 44m 38s") |
| Declination (Dec) | 25.645 (25° 38' 42s) |
| Primary magnitude | 4.94 |
| Secondary magnitude | 5.04 |
| Spectral type (primary/secondary) | F5V |
| Separation (arcseconds) | 0.3 |
| Position angle | 138° |
| Discovery year | 1880 |
| Last observed | 2019 |
| Primary proper motion (RA, Dec) | +048+014 |
| Secondary proper motion (RA, Dec) | |
| Number of observations | 450 |
Components of 21446+2539
| Component | Magnitude | Separation (arcseconds) | Position angle |
| AB | 5.04 | 0.3 | 138 |
| AB,C | 10.8 | 9.5 | 307 |
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 21446+2539
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| Object name | 21446+2539 |
| Field of view | |
| Limiting magnitude | |
| 21446+2539 coordinates | 21.74408, 25.645 |
| Center coordinates | 21.74408, 25.645 |
21446 2539 Passage Through Night
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Current position of 21446 2539
| Time | 23:17 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 37° |
| Azimuth | 276° |
Here you can see the current position of 21446 2539 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 21446 2539 Visible Throughout the Year?
21446+2539 will remain visible until January 25, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Sun, 18 October 2026 |
| Astronomical observing session begins | 17:50 |
| Astronomical observing session ends | 03:45 |
| Astronomical observing duration | 10h 55m |
| Rise | 11:41 |
| Set | 02:30 |
| Elevation at transit | 78° |
| Transit time | 19:05 |
| Equatorial coordinates | RA: 21h 44m 38s", Dec: 25° 38' 42s |
| Magnitude | 5 |
| Constellation | Pegasus |
The graph illustrates the annual visibility pattern of 21446 2539, 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 21446 2539 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 21446 2539 is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 21446+2539
Coordinates and Visibility
| Right Ascension | 21h 44m 39s |
| Declination | 25° 38′ 42″ |
| Magnitude | 4.94 |
| Constellation | Pegasus |
| Elevation | 36.7° |
| Azimuth | 276.3° |