Comet 90004713 C/2021 S1 (ATLAS) Observation Details
/90004713 C/2021 S1 (ATLAS).png)
C/2021 S1 (ATLAS) Daily Motion
C/2021 S1 (ATLAS) will not be observable tonight. It will reach its transit at 31° by 14:50 and set at 19:43. Throughout the night, from 22:47 to 04:29, it will be below the horizon. C/2021 S1 (ATLAS) will rise again after sunrise, at 09:54.90004713 C/2021 S1 (ATLAS) will become visible in August, 3. After being too close to the Sun to observe, it will reappear in the night sky. Starting from August, 3, 90004713 C/2021 S1 (ATLAS) can be seen again, providing a good opportunity for observation.
C/2021 S1 (ATLAS) Visibility Timetable on July 23
C/2021 S1 (ATLAS) Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 8.1% illuminated | 03:29 | -67° |
| C/2021 S1 (ATLAS) transit | 14:50 | 31° |
| C/2021 S1 (ATLAS) set | 19:43 | |
| Moon Set | 19:45 | -0° |
| Astrosession begin | 22:47 | -34° |
| Astrosession end | 04:29 | -60° |
| C/2021 S1 (ATLAS) rise | 09:54 |
Track C/2021 S1 (ATLAS) Position Throughout the Night
← Wed, 23 July 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe C/2021 S1 (ATLAS) changing position in the night sky.
C/2021 S1 (ATLAS) Description
C/2021 S1 (ATLAS), designated as 90004713 C/2021 S1 (ATLAS), is a comet on a hyperbolic (unbound) trajectory. At the moment, 90004713 C/2021 S1 (ATLAS) is 10.913 AU (1,632,561,563 km) from Earth, and it is located in the constellation Hydra.Current position of C/2021 S1 (ATLAS) in Solar System
| Date | Wed, 23 July 2025 |
| Distance from Earth to C/2021 S1 (ATLAS) | 10.921 AU (1,633,758,346km) |
| Elongation | 43° |
| Angular diameter | " |
| Magnitude | 22 |
Finder Chart for C/2021 S1 (ATLAS)
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| Object name | 90004713 C/2021 S1 (ATLAS) |
| Field of view | |
| Limiting magnitude | |
| 90004713 C/2021 S1 (ATLAS) coordinates | 9.36249, -18.76192 |
| Center coordinates | 9.36249, -18.76192 |
Annual motion of C/2021 S1 (ATLAS)
| Date | Wed, 23 July 2025 |
| Twighlight start | 22:43 |
| Twighlight end | 04:23 |
| Twighlight duration | 6h 40m |
| Rise | 09:54 |
| Set | 19:40 |
| Elevation at transit | 31° |
| Transit time | 14:47 |
| Equatorial coordinates | RA: 09h 22m 08s", Dec: -18° 47' 52s |
| Magnitude | 22 |
| Constellation | Hydra |
The graph illustrates the annual visibility pattern of a C/2021 S1 (ATLAS), 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 S1 (ATLAS) 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 S1 (ATLAS) 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.