(113) Amalthea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Jun 2026	13.4	2.478 AU	2.242 AU	23h32m	-05°26'	91.1°	24.2°
Opposition	11 Sep 2026	11.7	2.539 AU	1.536 AU	23h29m	-09°47'	174.0°	2.4°

The interactive orbit chart above shows the body's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of Amalthea are:

            e (Eccentricity)                : 0.0862648
            a (Semimajor axis)              : 2.3764756
            i (Inclination)                 : 5.04256
            Ω (Longitude of ascending node) : 123.32165
            ω (Argument of perihelion)      : 80.24810
            M (Mean anomaly)                : 114.00862
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 203.53259
            B (Latitude of perihelion)      : 4.96951
            P (Orbital period in years)     : 3.66            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.

The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.

The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-06-14 00:00 UT   23 32 34.2   -05 26 26     2.242    2.478   91.1   24.2   247   13.4 
2026-06-14 19:47 UT   23 33 19.4   -05 23 29     2.232    2.479   91.7   24.2   247   13.4 
2026-06-15 00:00 UT   23 33 28.9   -05 22 51     2.230    2.479   91.8   24.2   247   13.4 
2026-06-16 00:00 UT   23 34 22.6   -05 19 23     2.218    2.479   92.5   24.2   247   13.4 
2026-06-17 00:00 UT   23 35 15.4   -05 16 03     2.206    2.480   93.2   24.1   247   13.3 
2026-06-18 00:00 UT   23 36 07.2   -05 12 50     2.194    2.481   94.0   24.1   247   13.3 
2026-06-19 00:00 UT   23 36 58.0   -05 09 44     2.182    2.482   94.7   24.1   247   13.3 
2026-06-20 00:00 UT   23 37 47.7   -05 06 47     2.171    2.483   95.5   24.0   247   13.3 
2026-06-21 00:00 UT   23 38 36.4   -05 03 57     2.159    2.483   96.2   24.0   247   13.3 
2026-06-22 00:00 UT   23 39 24.1   -05 01 15     2.147    2.484   97.0   24.0   247   13.3 
2026-06-23 00:00 UT   23 40 10.7   -04 58 40     2.135    2.485   97.7   23.9   247   13.3 
2026-06-24 00:00 UT   23 40 56.3   -04 56 15     2.124    2.486   98.5   23.9   247   13.3 
2026-06-25 00:00 UT   23 41 40.8   -04 53 57     2.112    2.487   99.3   23.8   247   13.2 
2026-06-26 00:00 UT   23 42 24.1   -04 51 47     2.100    2.487  100.0   23.7   247   13.2 
2026-06-27 00:00 UT   23 43 06.4   -04 49 46     2.088    2.488  100.8   23.7   247   13.2 
2026-06-28 00:00 UT   23 43 47.5   -04 47 54     2.077    2.489  101.6   23.6   247   13.2 
2026-06-29 00:00 UT   23 44 27.5   -04 46 10     2.065    2.490  102.4   23.5   247   13.2 
2026-06-30 00:00 UT   23 45 06.3   -04 44 35     2.054    2.490  103.2   23.4   247   13.2 
2026-07-01 00:00 UT   23 45 44.0   -04 43 09     2.042    2.491  104.0   23.3   247   13.2 
2026-07-02 00:00 UT   23 46 20.5   -04 41 52     2.031    2.492  104.8   23.2   247   13.2 
2026-07-03 00:00 UT   23 46 55.7   -04 40 44     2.019    2.493  105.6   23.1   247   13.1 
2026-07-04 00:00 UT   23 47 29.7   -04 39 45     2.008    2.493  106.4   23.0   247   13.1 
2026-07-05 00:00 UT   23 48 02.5   -04 38 55     1.997    2.494  107.2   22.9   248   13.1 
2026-07-06 00:00 UT   23 48 34.1   -04 38 15     1.985    2.495  108.0   22.8   248   13.1 
2026-07-07 00:00 UT   23 49 04.3   -04 37 45     1.974    2.496  108.9   22.7   248   13.1 
2026-07-08 00:00 UT   23 49 33.3   -04 37 24     1.963    2.496  109.7   22.5   248   13.1 
2026-07-09 00:00 UT   23 50 00.9   -04 37 13     1.952    2.497  110.6   22.4   248   13.0 
2026-07-10 00:00 UT   23 50 27.2   -04 37 12     1.941    2.498  111.4   22.3   248   13.0 
2026-07-11 00:00 UT   23 50 52.1   -04 37 21     1.930    2.499  112.3   22.1   248   13.0 
2026-07-12 00:00 UT   23 51 15.7   -04 37 40     1.919    2.499  113.1   22.0   248   13.0 
2026-07-13 00:00 UT   23 51 37.9   -04 38 09     1.908    2.500  114.0   21.8   248   13.0 
2026-07-14 00:00 UT   23 51 58.7   -04 38 49     1.897    2.501  114.9   21.6   248   13.0 

    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.