Observation details: asteroid Amalthea
Daily motion of Amalthea
113 Amalthea will remain visible until February 13, when it moves too close to the Sun and temporarily disappears from the night sky.
Amalthea visibility on 2026-08-18
113 Amalthea Visible from early morning until sunrise
Amalthea rise and set timetable
| Time | Elevation | |
Moonrise, 21% illuminated  | 09:49 | -35° |
| Amalthea rise | 19:31 | |
| Astronomical observing session begins | 19:32 | 0° |
| Moonset | 20:26 | 11° |
| Amalthea transit | 01:10 | 46° |
| Astronomical observing session ends | 02:51 | 40° |
| Twilight end | 03:26 | 36° |
| Civil sunrise | 03:59 | 31° |
| Sunrise | 04:28 | 26° |
| Amalthea set | 06:48 |
Track Amalthea Position Throughout the Night
← 18 August 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Amalthea changing position in the night sky.
Amalthea Description
This asteroid is designated 113 Amalthea, main-belt asteroid Its diameter is approximately 50 km. 113 Amalthea completes an orbit around the Sun in 3.7 years. It is currently 1.6 AU (239,398,481 km) from Earth, and is located in the constellation Aquarius.Current position in the Solar System: Amalthea
| Date | Tue, 18 August 2026 |
| Distance from Earth | 1.59726 AU (238,946,695km) |
| Elongation | 150° |
| Angular diameter | " |
| Magnitude | 12.1 |
Finder Chart for Amalthea
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| Object name | Amalthea |
| Field of view | |
| Limiting magnitude | |
| Amalthea coordinates | 23.82997, -6.64736 |
| Center coordinates | 23.82997, -6.64736 |
Annual motion of Amalthea
| Date | Tue, 18 August 2026 |
| Twilight start | 19:28 |
| Twilight end | 02:44 |
| Twilight duration | 7h 17m |
| Rise | 19:31 |
| Set | 06:48 |
| Elevation at transit | 46° |
| Transit time | 01:09 |
| Equatorial coordinates | RA: 23h 49m 14s", Dec: -6° 45' 20s |
| Magnitude | 12 |
| 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 113 Amalthea
Coordinates and Visibility
| Right Ascension | 23.82997° |
| Declination | -6.64736° |
| Magnitude | 12.1 |
| Constellation | Aquarius |
| Elevation | 15.3° |
| Azimuth | 248.9° |
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.