Asteroid 259 Aletheia Observation Details
Aletheia Daily Motion
259 Aletheia will become visible in June, 22. After being too close to the Sun to observe, it will reappear in the night sky. Starting from June, 22, 259 Aletheia can be seen again, providing a good opportunity for observation.
Aletheia Visibility on April 05
259 Aletheia is visible just before sunrise
Aletheia Rise and Set Timetable
| Time | Elevation | |
| Aletheia transit | 08:41 | 35° |
| Aletheia set | 13:45 | |
| Astrosession begin | 19:03 | -61° |
Moon Rise, 91.8% illuminated  | 20:37 | -70° |
| Astrosession end | 03:17 | -3° |
| Aletheia rise | 03:34 | |
| Civil sunrise | 04:20 | 8° |
| Sunrise | 04:48 | 13° |
| Moon Set | 06:21 | 27° |
Track Aletheia Position Throughout the Night
← Sun, 5 April 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Aletheia changing position in the night sky.
Aletheia Description
Aletheia, designated as 259 Aletheia, is a main-belt asteroid, located between Mars and Jupiter in the solar system. With a diameter of 174 km, 259 Aletheia completes its orbit around the Sun in 5.6 years. At the moment, 259 Aletheia is 3.563 AU (533,017,213 km) from Earth, and it is located in the constellation Aquarius.Current position of Aletheia in Solar System
| Date | Sun, 5 April 2026 |
| Distance from Earth to Aletheia | 3.563 AU (533,017,213km) |
| Elongation | 44° |
| Angular diameter | " |
| Magnitude | 13.68 |
Finder Chart for Aletheia
Double-click to unlock the map.
| Object name | 259 Aletheia |
| Field of view | |
| Limiting magnitude | |
| 259 Aletheia coordinates | 22.422154594465, -17.323521271981 |
| Center coordinates | 22.422154594465, -17.323521271981 |
Annual motion of Aletheia
| Date | Mon, 6 April 2026 |
| Twighlight start | 19:03 |
| Twighlight end | 03:14 |
| Twighlight duration | 8h 11m |
| Rise | 03:34 |
| Set | 13:42 |
| Elevation at transit | 35° |
| Transit time | 08:38 |
| Equatorial coordinates | RA: 22h 26m 47s", Dec: -17° 13' 34s |
| Magnitude | 14 |
| Constellation | Aquarius |
The graph illustrates the annual visibility pattern of a Aletheia, 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 Aletheia 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 Aletheia 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 259 Aletheia
Coordinates & Visibility
| Right Ascension | 22.422154594465° |
| Declination | -17.323521271981° |
| Magnitude | 13.68 |
| Constellation | Aquarius |
| Elevation | -43.5° |
| Azimuth | 78° |
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.