Comet 90004714 C/2021 S3 (PANSTARRS) Observation Details
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C/2021 S3 (PANSTARRS) Daily Motion
C/2021 S3 (PANSTARRS) will not be observable tonight. It will reach its transit at 57° by 12:14 and set at 18:14. Throughout the night, from 20:19 to 05:50, it will be below the horizon. C/2021 S3 (PANSTARRS) will rise again after sunrise, at 06:12.90004714 C/2021 S3 (PANSTARRS) will become visible in September, 29. After being too close to the Sun to observe, it will reappear in the night sky. Starting from September, 29, 90004714 C/2021 S3 (PANSTARRS) can be seen again, providing a good opportunity for observation.
C/2021 S3 (PANSTARRS) Visibility Timetable on August 13
C/2021 S3 (PANSTARRS) Rise and Set Timetable
| Time | Elevation | |
| C/2021 S3 (PANSTARRS) transit | 12:14 | 57° |
| C/2021 S3 (PANSTARRS) set | 18:14 | |
| Astrosession begin | 20:19 | -26° |
| Moon Rise, 75.6% illuminated | 22:41 | -51° |
| Astrosession end | 05:50 | -5° |
| C/2021 S3 (PANSTARRS) rise | 06:12 | |
| Civil sunrise | 06:39 | 6° |
| Sunrise | 07:02 | 10° |
| Moon Set | 11:07 | 54° |
Track C/2021 S3 (PANSTARRS) Position Throughout the Night
← Wed, 13 August 2025 →
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Shift the map to change the time and observe C/2021 S3 (PANSTARRS) changing position in the night sky.
C/2021 S3 (PANSTARRS) Description
C/2021 S3 (PANSTARRS), designated as 90004714 C/2021 S3 (PANSTARRS), is a comet on a hyperbolic (unbound) trajectory. At the moment, 90004714 C/2021 S3 (PANSTARRS) is 8.618 AU (1,289,204,530 km) from Earth, and it is located in the constellation Cancer.Current position of C/2021 S3 (PANSTARRS) in Solar System
| Date | Wed, 13 August 2025 |
| Distance from Earth to C/2021 S3 (PANSTARRS) | 8.6178 AU (1,289,204,530km) |
| Elongation | 21° |
| Angular diameter | " |
| Magnitude | 19.3 |
Finder Chart for C/2021 S3 (PANSTARRS)
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| Object name | 90004714 C/2021 S3 (PANSTARRS) |
| Field of view | |
| Limiting magnitude | |
| 90004714 C/2021 S3 (PANSTARRS) coordinates | 8.72613, 32.62931 |
| Center coordinates | 8.72613, 32.62931 |
Annual motion of C/2021 S3 (PANSTARRS)
| Date | Thu, 14 August 2025 |
| Twighlight start | 20:15 |
| Twighlight end | 05:45 |
| Twighlight duration | 9h 30m |
| Rise | 06:12 |
| Set | 18:10 |
| Elevation at transit | 57° |
| Transit time | 12:11 |
| Equatorial coordinates | RA: 08h 44m 18s", Dec: 32° 35' 12s |
| Magnitude | 19 |
| Constellation | Cancer |
The graph illustrates the annual visibility pattern of a C/2021 S3 (PANSTARRS), 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 C/2021 S3 (PANSTARRS) 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 C/2021 S3 (PANSTARRS) 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.
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.