Asteroid Mnemosyne Observation Details
Mnemosyne Daily Motion
57 Mnemosyne will be visible until December, 2, 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.
Mnemosyne Visibility on July 20
57 Mnemosyne is visible all night until sunrise
Mnemosyne Rise and Set Timetable
| Time | Elevation | |
Moon Rise, 25.8% illuminated  | 09:58 | -54° |
| Mnemosyne rise | 16:05 | |
| Sunset | 18:24 | 27° |
| Civil sunset | 18:55 | 32° |
| Twighlight start | 19:32 | 38° |
| Astrosession begin | 20:12 | 44° |
| Moon Set | 21:33 | 51° |
| Mnemosyne transit | 22:00 | 51° |
| Astrosession end | 02:15 | 19° |
| Twighlight end | 02:56 | 12° |
| Civil sunrise | 03:33 | 4° |
| Mnemosyne set | 03:55 |
Track Mnemosyne Position Throughout the Night
← Mon, 20 July 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Mnemosyne changing position in the night sky.
Mnemosyne Description
Mnemosyne, designated as 57 Mnemosyne, is a main-belt asteroid, located between Mars and Jupiter in the solar system. With a diameter of 112 km, 57 Mnemosyne completes its orbit around the Sun in 5.6 years. At the moment, 57 Mnemosyne is 2.372 AU (354,892,525 km) from Earth, and it is located in the constellation Aquila.Current position of Mnemosyne in Solar System
| Date | Mon, 20 July 2026 |
| Distance from Earth to Mnemosyne | 2.37351 AU (355,072,042km) |
| Elongation | 154° |
| Angular diameter | " |
| Magnitude | 12 |
Finder Chart for Mnemosyne
Double-click to unlock the map.
| Object name | 57 Mnemosyne |
| Field of view | |
| Limiting magnitude | |
| 57 Mnemosyne coordinates | 18.75459, -1.44183 |
| Center coordinates | 18.75459, -1.44183 |
Annual motion of Mnemosyne
| Date | Mon, 20 July 2026 |
| Twighlight start | 20:08 |
| Twighlight end | 02:09 |
| Twighlight duration | 6h 1m |
| Rise | 16:05 |
| Set | 03:54 |
| Elevation at transit | 51° |
| Transit time | 22:00 |
| Equatorial coordinates | RA: 18h 44m 35s", Dec: -1° 29' 07s |
| Magnitude | 12 |
| Constellation | Aquila |
The graph illustrates the annual visibility pattern of a Mnemosyne, 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 Mnemosyne 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. You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
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 Mnemosyne 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. You can also view detailed visibility information in a dedicated table, including exact rise, transit, and set times for each date.
Astrometric & Physical Parameters of 57 Mnemosyne
Coordinates & Visibility
| Right Ascension | 18.75459° |
| Declination | -1.44183° |
| Magnitude | 12 |
| Constellation | Aquila |
| Elevation | -46.2° |
| Azimuth | 318.6° |
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.