(109) Felicitas
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	14.0	2.390 AU	3.314 AU	10h27m	+13°17'	19.5°	8.1°
Opposition	27 Mar 2026	12.9	2.984 AU	1.986 AU	12h24m	-03°33'	179.0°	0.3°

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 Felicitas are:

            e (Eccentricity)                : 0.3006129
            a (Semimajor axis)              : 2.6939165
            i (Inclination)                 : 7.84479
            Ω (Longitude of ascending node) : 2.72993
            ω (Argument of perihelion)      : 57.63492
            M (Mean anomaly)                : 22.12585
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 60.12077
            B (Latitude of perihelion)      : 6.62017
            P (Orbital period in years)     : 4.42            
        

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
2025-09-16 00:00 UT   10 27 51.7   +13 17 41     3.314    2.390   19.5    8.1   301   14.0 
2025-09-16 00:12 UT   10 27 52.6   +13 17 35     3.314    2.390   19.5    8.1   301   14.0 
2025-09-17 00:00 UT   10 29 36.0   +13 06 40     3.313    2.393   20.0    8.3   301   14.1 
2025-09-18 00:00 UT   10 31 19.8   +12 55 39     3.312    2.397   20.5    8.5   301   14.1 
2025-09-19 00:00 UT   10 33 03.2   +12 44 38     3.310    2.400   21.1    8.6   301   14.1 
2025-09-20 00:00 UT   10 34 46.2   +12 33 37     3.309    2.403   21.6    8.8   300   14.1 
2025-09-21 00:00 UT   10 36 28.8   +12 22 36     3.307    2.407   22.1    9.0   300   14.1 
2025-09-22 00:00 UT   10 38 11.0   +12 11 35     3.306    2.410   22.6    9.2   300   14.1 
2025-09-23 00:00 UT   10 39 52.7   +12 00 35     3.304    2.413   23.1    9.4   300   14.1 
2025-09-24 00:00 UT   10 41 34.0   +11 49 34     3.302    2.416   23.6    9.6   300   14.1 
2025-09-25 00:00 UT   10 43 14.9   +11 38 35     3.300    2.420   24.1    9.8   299   14.1 
2025-09-26 00:00 UT   10 44 55.3   +11 27 35     3.298    2.423   24.7    9.9   299   14.1 
2025-09-27 00:00 UT   10 46 35.4   +11 16 36     3.295    2.426   25.2   10.1   299   14.1 
2025-09-28 00:00 UT   10 48 15.0   +11 05 38     3.293    2.430   25.7   10.3   299   14.2 
2025-09-29 00:00 UT   10 49 54.1   +10 54 41     3.291    2.433   26.3   10.5   299   14.2 
2025-09-30 00:00 UT   10 51 32.9   +10 43 44     3.288    2.436   26.8   10.7   299   14.2 
2025-10-01 00:00 UT   10 53 11.2   +10 32 48     3.285    2.440   27.3   10.9   299   14.2 
2025-10-02 00:00 UT   10 54 49.1   +10 21 52     3.283    2.443   27.9   11.0   298   14.2 
2025-10-03 00:00 UT   10 56 26.6   +10 10 58     3.280    2.446   28.4   11.2   298   14.2 
2025-10-04 00:00 UT   10 58 03.6   +10 00 05     3.277    2.449   28.9   11.4   298   14.2 

    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.