Asteroid 747 Winchester Observation Details
Winchester Daily Motion
Winchester rise at 17:59, and will be at 7° when twilight starts at 18:41. It will reach its transit at 27° at 22:31, and will set at 03:02, before twighlight ends at 03:23.747 Winchester will become visible in December, 13. After being too close to the Sun to observe, it will reappear in the night sky. Starting from December, 13, 747 Winchester can be seen again, providing a good opportunity for observation.
Winchester Visibility Timetable on September 17
Winchester Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 29.5% illuminated | 23:16 | 26° |
| Moon Set | 14:45 | -36° |
| Winchester rise | 17:59 | |
| Astrosession begin | 18:41 | 7° |
| Winchester transit | 22:31 | 27° |
| Winchester set | 03:02 | |
| Astrosession end | 03:23 | -4° |
Track Winchester Position Throughout the Night
← Wed, 17 September 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Winchester changing position in the night sky.
Winchester Description
Winchester, designated as 747 Winchester, is a main-belt asteroid, located between Mars and Jupiter in the solar system. With a diameter of 172 km, 747 Winchester completes its orbit around the Sun in 5.2 years. At the moment, 747 Winchester is 1.32 AU (197,514,069 km) from Earth, and it is located in the constellation Sculptor.Current position of Winchester in Solar System
| Date | Wed, 17 September 2025 |
| Distance from Earth to Winchester | 1.3204 AU (197,529,028km) |
| Elongation | 155° |
| Angular diameter | " |
| Magnitude | 11.1 |
Finder Chart for Winchester
Double-click to unlock the map.
| Object name | 747 Winchester |
| Field of view | |
| Limiting magnitude | |
| 747 Winchester coordinates | 23.15794, -26.11325 |
| Center coordinates | 23.15794, -26.11325 |
Annual motion of Winchester
| Date | Thu, 18 September 2025 |
| Twighlight start | 18:39 |
| Twighlight end | 03:22 |
| Twighlight duration | 9h 43m |
| Rise | 17:56 |
| Set | 02:57 |
| Elevation at transit | 26° |
| Transit time | 22:26 |
| Equatorial coordinates | RA: 23h 08m 47s", Dec: -26° 17' 33s |
| Magnitude | 11 |
| Constellation | Sculptor |
The graph illustrates the annual visibility pattern of a Winchester, 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 Winchester 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 Winchester 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 747 Winchester
Coordinates & Visibility
| Right Ascension | 23.15794° |
| Declination | -26.11325° |
| Magnitude | 11.1 |
| Constellation | Sculptor |
| Elevation | -25.6° |
| Azimuth | -104.4° |
Acknowledgments
We acknowledge NASA's Jet Propulsion Laboratory (JPL) for providing essential data on asteroids and comets through their Small-Body Database (SBDB) and Center for Near-Earth Object Studies (CNEOS). Their continuous efforts in tracking and cataloging these celestial bodies make it possible to offer accurate and up-to-date information on their positions, orbits, and physical characteristics.