Double Star 21221+1948 Observation Details
21221+1948 Daily Motion
21221+1948 will be visible until January, 18, when it will move too close to the Sun. During this time, its proximity to the Sun will cause it to disappear from the night sky, making it unobservable for a while.
21221+1948 Visibility Timetable on August 10
21221+1948 Rise and Set Timetable
| Time | Elevation | |
| 21221+1948 rise | 18:29 | |
| Sunset | 20:34 | 23° |
| Moon Rise, 99.4% illuminated | 21:05 | 29° |
| Civil sunset | 21:05 | 29° |
| Astrosession begin | 22:19 | 43° |
| 21221+1948 transit | 01:38 | 70° |
| Astrosession end | 04:55 | 43° |
| Civil sunrise | 06:09 | 29° |
| Sunrise | 06:40 | 23° |
| Moon Set | 07:56 | 9° |
| 21221+1948 set | 08:47 |
Track 21221+1948 Position Throughout the Night
← Sun, 10 August 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe 21221+1948 changing position in the night sky.
21221+1948 Star System Description
21221+1948 is Quadruple Star System located in constellation Pegasus at coordinates RA: 21h 22m 05s", Dec: 19° 48' 15s.
The primary component has a magnitude of 4.20, while the secondary component has a magnitude of 9.3. They are separated by 37.1 arcseconds at a position angle of 308 degrees. The brightness difference between the two components is 5.1 magnitudes, with the primary component being approximately 109.6 times brighter than the secondary.
The primary and secondary stars are both orange in color
Below is a table with star system details from the Washington Double Star (WDS) Catalog. This catalog is a comprehensive source of information on double and multiple star systems, providing key data on the positions, magnitudes, and separations of stellar components.
The primary component has a magnitude of 4.20, while the secondary component has a magnitude of 9.3. They are separated by 37.1 arcseconds at a position angle of 308 degrees. The brightness difference between the two components is 5.1 magnitudes, with the primary component being approximately 109.6 times brighter than the secondary.
The primary and secondary stars are both orange in color
Below is a table with star system details from the Washington Double Star (WDS) Catalog. This catalog is a comprehensive source of information on double and multiple star systems, providing key data on the positions, magnitudes, and separations of stellar components.
Technical Details of Star System 21221+1948
| Property | Value |
|---|---|
| Star System Identifier | 21221+1948 |
| System Type | Quadruple Star System |
| Primary Star | 1 Peg |
| Right Ascension (RA) | 21.36808 (21h 22m 05s") |
| Declination (Dec) | 19.80436 (19° 48' 15s) |
| Magnitude (Primary) | 4.20 |
| Magnitude (Secondary) | 9.3 |
| Spectral Type (Primary/Secondary) | K1III+K0V (orange/orange) |
| Separation (Arcseconds) | 37.1 |
| Position Angle | 308° |
| Discovery Year | 1780 |
| Last Observed | 2020 |
| Primary Proper Motion (Ra, Dec) | +105+063 |
| Secondary Proper Motion (Ra, Dec) | +119+056 |
| Number of Observations | 85 |
21221+1948 Components
| Component | Magnitude | Separation (arcseconds) | Position Angle |
| AB | 9.3 | 37.1 | 308 |
| AC | 12.9 | 75.7 | 20 |
| AD | 9.6 | 4.4 | 142 |
The data presented in this table is sourced from the Washington Double Star (WDS) Catalog, a comprehensive repository of double and multiple star system information maintained by the U.S. Naval Observatory. We thank the WDS team for their continued efforts in providing accurate and detailed astronomical data.
Finder Chart for 1 Peg
Double-click to unlock the map.
| Object name | 21221+1948 |
| Field of view | |
| Limiting magnitude | |
| 21221+1948 coordinates | 21.36808, 19.80436 |
| Center coordinates | 21.36808, 19.80436 |
21221+1948 Passage Through Night
Double-click to unlock the map.
Current position of 21221+1948
| Time | 10:03 |
| Latitude | 39.9625 |
| Longitude | -83.0061 |
| 21221+1948 elevation | -12° |
| 21221+1948 Azimuth | 51° |
Here you can see the current position of the 21221+1948 on the map, as well as its positions for rise and set. This tool allows you to track the 21221+1948's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 21221+1948
| Date | Sun, 10 August 2025 |
| Twighlight start | 22:15 |
| Twighlight end | 04:49 |
| Twighlight duration | 7h 34m |
| Rise | 18:29 |
| Set | 08:47 |
| Elevation at transit | 70° |
| Transit time | 01:38 |
| Equatorial coordinates | RA: 21h 22m 05s", Dec: 19° 48' 15s |
| Magnitude | 4 |
| Constellation | Pegasus |
The graph illustrates the annual visibility pattern of a 21221+1948, providing a comprehensive overview of its daily appearances and transit times throughout the year.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the 21221+1948 is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.
The graph is structured with the vertical axis showing the hours of the day, ranging from 12 AM to 12 AM the next day, while the horizontal axis spans each day of the year.
The reddish shaded area indicates the periods when the 21221+1948 is above the horizon, visible to observers. The white line marks the times when the celestial object reaches its highest point in the sky each day, known as the transit.