Observation details: asteroid Astraea
Daily motion of Astraea
5 Astraea will remain visible until January 19, when it moves too close to the Sun and temporarily disappears from the night sky.
Astraea visibility on 2026-08-18
5 Astraea Visible from evening until sunrise
Astraea rise and set timetable
| Time | Elevation | |
Moonrise, 21% illuminated  | 09:49 | -49° |
| Astraea rise | 18:34 | |
| Twilight start | 18:57 | 4° |
| Astronomical observing session begins | 19:32 | 11° |
| Moonset | 20:26 | 21° |
| Astraea transit | 00:02 | 43° |
| Astronomical observing session ends | 02:51 | 28° |
| Twilight end | 03:26 | 23° |
| Civil sunrise | 03:59 | 17° |
| Sunrise | 04:28 | 12° |
| Astraea set | 05:30 |
Track Astraea Position Throughout the Night
← 18 August 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Astraea changing position in the night sky.
Astraea Description
This asteroid is designated 5 Astraea, main-belt asteroid Its diameter is approximately 106 km. 5 Astraea completes an orbit around the Sun in 4.1 years. It is currently 2.05 AU (306,600,836 km) from Earth, and is located in the constellation Aquarius.Current position in the Solar System: Astraea
| Date | Tue, 18 August 2026 |
| Distance from Earth | 2.04806 AU (306,385,415km) |
| Elongation | 167° |
| Angular diameter | " |
| Magnitude | 11.3 |
Finder Chart for Astraea
Double-click to unlock the map.
| Object name | Astraea |
| Field of view | |
| Limiting magnitude | |
| Astraea coordinates | 22.69931, -10.02572 |
| Center coordinates | 22.69931, -10.02572 |
Annual motion of Astraea
| Date | Tue, 18 August 2026 |
| Twilight start | 19:28 |
| Twilight end | 02:44 |
| Twilight duration | 7h 17m |
| Rise | 18:34 |
| Set | 05:29 |
| Elevation at transit | 43° |
| Transit time | 00:02 |
| Equatorial coordinates | RA: 22h 41m 10s", Dec: -10° 07' 48s |
| Magnitude | 11 |
| Constellation | Aquarius |
The graph summarizes the object’s annual visibility, daily observing windows and transit times.
The vertical axis shows time of day and the horizontal axis shows the days of the year.
The shaded area marks when the object is above the horizon; the white line marks daily transit. You can also view the detailed annual visibility table.
The vertical axis shows time of day and the horizontal axis shows the days of the year.
The shaded area marks when the object is above the horizon; the white line marks daily transit. You can also view the detailed annual visibility table.
Astrometric and Physical Parameters of 5 Astraea
Coordinates and Visibility
| Right Ascension | 22.69931° |
| Declination | -10.02572° |
| Magnitude | 11.3 |
| Constellation | Aquarius |
| Elevation | -37.6° |
| Azimuth | 288.1° |
Physical properties
| Mean radius | 59.5 |
| Mass | 1.2E+18 |
| Density | 1 |
Orbital parameters
| Sidereal orbital period | 1507.279 |
Data acknowledgment
Physical and orbital parameters come from the Solar System OpenData API , maintained by Le Système Solaire. We thank its contributors for making these data available.
Acknowledgments
Orbital and small-body data are provided by NASA Jet Propulsion Laboratory (JPL) Small-Body Database (SBDB) and Center for Near-Earth Object Studies (CNEOS). These resources support accurate positions, orbits and physical characteristics.