Double Star 04204+2721 Observation Details
04204+2721 Daily Motion
04204+2721 will rise at 21:16, during twilight, and will ascend to 72° by the time twilight ends at 03:39.04204+2721 will be visible until April, 16, 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.
04204+2721 Visibility Timetable on August 31
04204+2721 Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 46.4% illuminated | 11:58 | 4° |
| Astrosession begin | 19:10 | -17° |
| 04204+2721 rise | 21:16 | |
| Moon Set | 21:19 | 1° |
| Astrosession end | 03:06 | 66° |
| Civil sunrise | 04:11 | 77° |
| Sunrise | 04:39 | 80° |
| 04204+2721 transit | 04:48 | 80° |
Track 04204+2721 Position Throughout the Night
← Sun, 31 August 2025 →
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Where is 04204+2721 right now?
04204+2721 is located in the constellation Taurus, at right ascension 04h 20m 21s" and declination 27° 21' 03s. At the current time, it is below the horizon and not visible from your location.04204+2721 Star System Description
04204+2721 is Triple Star System located in constellation Taurus at coordinates RA: 04h 20m 21s", Dec: 27° 21' 03s.
The primary component has a magnitude of 5.08, while the secondary component has a magnitude of 7.51. They are separated by 55.9 arcseconds at a position angle of 242 degrees. The brightness difference between the two components is 2.43 magnitudes, with the primary component being approximately 9.4 times brighter than the secondary.
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 5.08, while the secondary component has a magnitude of 7.51. They are separated by 55.9 arcseconds at a position angle of 242 degrees. The brightness difference between the two components is 2.43 magnitudes, with the primary component being approximately 9.4 times brighter than the secondary.
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 04204+2721
| Property | Value |
|---|---|
| Star System Identifier | 04204+2721 |
| System Type | Triple Star System |
| Primary Star | phi Tau |
| Right Ascension (RA) | 4.33922 (04h 20m 21s") |
| Declination (Dec) | 27.35094 (27° 21' 03s) |
| Magnitude (Primary) | 5.08 |
| Magnitude (Secondary) | 7.51 |
| Spectral Type (Primary/Secondary) | K2III |
| Separation (Arcseconds) | 55.9 |
| Position Angle | 242° |
| Discovery Year | 1832 |
| Last Observed | 2017 |
| Primary Proper Motion (Ra, Dec) | -029-078 |
| Secondary Proper Motion (Ra, Dec) | -017-001 |
| Number of Observations | 49 |
04204+2721 Components
| Component | Magnitude | Separation (arcseconds) | Position Angle |
| AB | 7.51 | 55.9 | 242 |
| AC | 12.27 | 120.0 | 30 |
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 phi Tau
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| Object name | 04204+2721 |
| Field of view | |
| Limiting magnitude | |
| 04204+2721 coordinates | 4.33922, 27.35094 |
| Center coordinates | 4.33922, 27.35094 |
04204+2721 Passage Through Night
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Current position of 04204+2721
| Time | 20:01 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| 04204+2721 elevation | -11° |
| 04204+2721 Azimuth | -42° |
Here you can see the current position of the 04204+2721 on the map, as well as its positions for rise and set. This tool allows you to track the 04204+2721's movement throughout the night, providing you with accurate and up-to-date information.
Annual motion of 04204+2721
| Date | Mon, 1 September 2025 |
| Twighlight start | 19:08 |
| Twighlight end | 03:04 |
| Twighlight duration | 8h 57m |
| Rise | 21:12 |
| Set | 12:16 |
| Elevation at transit | 80° |
| Transit time | 04:44 |
| Equatorial coordinates | RA: 04h 20m 21s", Dec: 27° 21' 03s |
| Magnitude | 5 |
| Constellation | Taurus |
The graph illustrates the annual visibility pattern of a 04204+2721, 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 04204+2721 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 04204+2721 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.
Astrometric & Physical Parameters of 04204+2721
Coordinates & Visibility
| Right Ascension | 4.33922° |
| Declination | 27.35094° |
| Magnitude | 5.08 |
| Constellation | Taurus |
| Elevation | -11.3° |
| Azimuth | -42.2° |