Asteroid 433 Eros Observation Details
Eros Daily Motion
Eros will rise before twilight begins, at 18:36, and will reach 5° elevation by the time twilight commences at 19:10. It will reach its transit at 84° by 02:26 and gradually fade away as the night ends at 03:06, maintaining an elevation of around 80°.433 Eros will be visible until June, 6, 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.
Eros Visibility Timetable on August 31
Eros Rise and Set Timetable
| Time | Elevation | |
| Moon Rise, 46.4% illuminated | 11:58 | -13° |
| Eros rise | 18:36 | |
| Astrosession begin | 19:10 | 5° |
| Moon Set | 21:19 | 28° |
| Eros transit | 02:26 | 84° |
| Astrosession end | 03:06 | 80° |
| Civil sunrise | 04:11 | 68° |
| Sunrise | 04:39 | 62° |
| Eros set | 10:17 |
Track Eros Position Throughout the Night
← Sun, 31 August 2025 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Eros changing position in the night sky.
Eros Description
Eros, designated as 433 Eros, is an Apollo asteroid, located in a crossing orbit between Earth and Mars in the solar system. With a diameter of 16.8 km, 433 Eros completes its orbit around the Sun in 1.8 years. At the moment, 433 Eros is 0.808 AU (120,818,232 km) from Earth, and it is located in the constellation Triangulum.Current position of Eros in Solar System
| Date | Sun, 31 August 2025 |
| Distance from Earth to Eros | 0.80498 AU (120,423,294km) |
| Elongation | 118° |
| Angular diameter | " |
| Magnitude | 11.9 |
Finder Chart for Eros
Double-click to unlock the map.
| Object name | 433 Eros |
| Field of view | |
| Limiting magnitude | |
| 433 Eros coordinates | 1.9737, 31.49453 |
| Center coordinates | 1.9737, 31.49453 |
Annual motion of Eros
| Date | Sun, 31 August 2025 |
| Twighlight start | 19:06 |
| Twighlight end | 02:59 |
| Twighlight duration | 8h 54m |
| Rise | 18:35 |
| Set | 10:19 |
| Elevation at transit | 84° |
| Transit time | 02:27 |
| Equatorial coordinates | RA: 01h 59m 08s", Dec: 31° 50' 43s |
| Magnitude | 12 |
| Constellation | Triangulum |
The graph illustrates the annual visibility pattern of a Eros, 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 Eros 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 Eros 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.
Astrometric & Physical Parameters of 433 Eros
Coordinates & Visibility
| Right Ascension | 1.9737° |
| Declination | 31.49453° |
| Magnitude | 11.9 |
| Constellation | Triangulum |
| Elevation | -10.7° |
| Azimuth | 35.5° |
Physical properties
| Boby mass in kg | 7200000000000000 |
| Body density in g.cm3 | 1 |
Orbital Parameters
| Sideral orbital time for body around another one (the Sun or a planet) in earth day | 643.219 |
Data Acknowledgment
Our solar system data—including planetary physical and orbital parameters—comes from the Solar System OpenData API , maintained by Le Système Solaire. We thank Christophe and the contributors for making this open data available.
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.