Asteroid 259 Aletheia Observation Details
Aletheia Daily Motion
259 Aletheia will be visible until August, 7, 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.
Aletheia Visibility Timetable on May 09
Aletheia Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 87.7% illuminated | 17:00 | -59° |
| Astrosession begin | 22:10 | -0° |
| Aletheia rise | 22:11 | |
| Aletheia transit | 03:17 | 36° |
| Astrosession end | 04:44 | 32° |
| Moon Set | 04:47 | 32° |
| Civil sunrise | 05:57 | 24° |
| Sunrise | 06:28 | 20° |
| Aletheia set | 08:23 |
Track Aletheia Position Throughout the Night
← Fri, 9 May 2025 →
| 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 1.789 AU (267,630,591 km) from Earth, and it is located in the constellation Ophiuchus.Current position of Aletheia in Solar System
| Date | Fri, 9 May 2025 |
| Distance from Earth to Aletheia | 1.789 AU (267,630,591km) |
| Elongation | 153° |
| Angular diameter | " |
| Magnitude | 11.9 |
Finder Chart for Aletheia
Double-click to unlock the map.
| Object name | 259 Aletheia |
| Field of view | |
| Limiting magnitude | |
| 259 Aletheia coordinates | 16.9273642477, -16.42849395881 |
| Center coordinates | 16.9273642477, -16.42849395881 |
Annual motion of Aletheia
| Date | Sat, 10 May 2025 |
| Twighlight start | 22:11 |
| Twighlight end | 04:42 |
| Twighlight duration | 7h 31m |
| Rise | 22:06 |
| Set | 08:19 |
| Elevation at transit | 36° |
| Transit time | 03:12 |
| Equatorial coordinates | RA: 16h 55m 01s", Dec: -16° 27' 14s |
| Magnitude | 12 |
| Constellation | Ophiuchus |
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.
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.
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.