(40) Harmonia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Sep 2025	11.2	2.222 AU	2.201 AU	06h29m	+21°32'	78.0°	26.3°
Opposition	2 Jan 2026	9.0	2.277 AU	1.294 AU	06h51m	+23°54'	179.0°	0.4°

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 Harmonia are:

            e (Eccentricity)                : 0.0460364
            a (Semimajor axis)              : 2.2669577
            i (Inclination)                 : 4.25591
            Ω (Longitude of ascending node) : 94.15594
            ω (Argument of perihelion)      : 269.47054
            M (Mean anomaly)                : 22.93684
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 183.62502
            B (Latitude of perihelion)      : -4.25573
            P (Orbital period in years)     : 3.41            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-09-18 00:00 UT   06 29 52.9   +21 32 42     2.201    2.222   78.0   26.3   273   11.2 
2025-09-18 03:06 UT   06 30 04.6   +21 32 38     2.200    2.222   78.1   26.3   273   11.2 
2025-09-19 00:00 UT   06 31 23.1   +21 32 17     2.190    2.223   78.7   26.3   273   11.2 
2025-09-20 00:00 UT   06 32 52.3   +21 31 49     2.179    2.223   79.3   26.4   273   11.2 
2025-09-21 00:00 UT   06 34 20.8   +21 31 20     2.167    2.224   79.9   26.4   273   11.2 
2025-09-22 00:00 UT   06 35 48.3   +21 30 50     2.156    2.224   80.6   26.4   273   11.2 
2025-09-23 00:00 UT   06 37 14.9   +21 30 17     2.145    2.225   81.2   26.5   273   11.1 
2025-09-24 00:00 UT   06 38 40.6   +21 29 43     2.133    2.225   81.9   26.5   274   11.1 
2025-09-25 00:00 UT   06 40 05.4   +21 29 07     2.122    2.226   82.5   26.5   274   11.1 
2025-09-26 00:00 UT   06 41 29.2   +21 28 30     2.110    2.226   83.2   26.6   274   11.1 
2025-09-27 00:00 UT   06 42 52.0   +21 27 52     2.099    2.227   83.8   26.6   274   11.1 
2025-09-28 00:00 UT   06 44 13.9   +21 27 13     2.087    2.227   84.5   26.6   274   11.1 
2025-09-29 00:00 UT   06 45 34.7   +21 26 33     2.076    2.228   85.2   26.6   274   11.1 
2025-09-30 00:00 UT   06 46 54.6   +21 25 52     2.064    2.228   85.8   26.6   275   11.1 
2025-10-01 00:00 UT   06 48 13.4   +21 25 10     2.053    2.229   86.5   26.6   275   11.1 
2025-10-02 00:00 UT   06 49 31.1   +21 24 28     2.041    2.229   87.2   26.6   275   11.0 
2025-10-03 00:00 UT   06 50 47.8   +21 23 46     2.030    2.230   87.9   26.6   275   11.0 
2025-10-04 00:00 UT   06 52 03.3   +21 23 03     2.018    2.230   88.6   26.6   275   11.0 
2025-10-05 00:00 UT   06 53 17.8   +21 22 20     2.007    2.231   89.3   26.6   275   11.0 
2025-10-06 00:00 UT   06 54 31.2   +21 21 37     1.995    2.231   90.0   26.6   275   11.0 
2025-10-07 00:00 UT   06 55 43.4   +21 20 54     1.984    2.232   90.7   26.6   276   11.0 
2025-10-08 00:00 UT   06 56 54.4   +21 20 12     1.972    2.232   91.4   26.6   276   11.0 
2025-10-09 00:00 UT   06 58 04.3   +21 19 30     1.960    2.233   92.1   26.6   276   11.0 
2025-10-10 00:00 UT   06 59 13.0   +21 18 48     1.949    2.233   92.8   26.5   276   10.9 
2025-10-11 00:00 UT   07 00 20.4   +21 18 07     1.937    2.234   93.5   26.5   276   10.9 
2025-10-12 00:00 UT   07 01 26.6   +21 17 27     1.926    2.234   94.3   26.5   276   10.9 
2025-10-13 00:00 UT   07 02 31.6   +21 16 48     1.914    2.235   95.0   26.4   276   10.9 
2025-10-14 00:00 UT   07 03 35.2   +21 16 10     1.903    2.235   95.8   26.4   276   10.9 
2025-10-15 00:00 UT   07 04 37.5   +21 15 34     1.891    2.236   96.5   26.3   277   10.9 
2025-10-16 00:00 UT   07 05 38.4   +21 14 59     1.880    2.236   97.3   26.3   277   10.9 

    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.