(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Jan 2025	12.8	2.820 AU	3.678 AU	17h04m	-23°07'	25.3°	8.6°
Opposition	1 Jul 2025	11.5	3.126 AU	2.116 AU	18h44m	-31°18'	171.8°	2.7°

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 Thalia are:

            e (Eccentricity)                : 0.2310765
            a (Semimajor axis)              : 2.6287227
            i (Inclination)                 : 10.10941
            Ω (Longitude of ascending node) : 66.49175
            ω (Argument of perihelion)      : 61.58568
            M (Mean anomaly)                : 77.77698
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 127.70061
            B (Latitude of perihelion)      : 8.88098
            P (Orbital period in years)     : 4.26            
        

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
2025-01-03 00:00 UT   17 04 20.0   -23 07 08     3.678    2.820   25.3    8.6   275   12.8 
2025-01-03 01:52 UT   17 04 27.8   -23 07 26     3.678    2.820   25.3    8.6   275   12.8 
2025-01-04 00:00 UT   17 05 59.8   -23 10 55     3.674    2.822   25.9    8.8   275   12.8 
2025-01-05 00:00 UT   17 07 39.5   -23 14 39     3.670    2.825   26.6    9.0   274   12.8 
2025-01-06 00:00 UT   17 09 18.9   -23 18 18     3.665    2.827   27.2    9.1   274   12.8 
2025-01-07 00:00 UT   17 10 58.1   -23 21 54     3.661    2.829   27.8    9.3   274   12.9 
2025-01-08 00:00 UT   17 12 37.0   -23 25 26     3.656    2.831   28.5    9.5   274   12.9 
2025-01-09 00:00 UT   17 14 15.7   -23 28 53     3.652    2.833   29.1    9.7   274   12.9 
2025-01-10 00:00 UT   17 15 54.2   -23 32 17     3.647    2.835   29.7    9.9   274   12.9 
2025-01-11 00:00 UT   17 17 32.4   -23 35 37     3.642    2.837   30.4   10.1   273   12.9 
2025-01-12 00:00 UT   17 19 10.4   -23 38 54     3.637    2.840   31.0   10.3   273   12.9 
2025-01-13 00:00 UT   17 20 48.1   -23 42 06     3.631    2.842   31.7   10.5   273   12.9 
2025-01-14 00:00 UT   17 22 25.5   -23 45 15     3.626    2.844   32.3   10.7   273   12.9 
2025-01-15 00:00 UT   17 24 02.7   -23 48 20     3.620    2.846   33.0   10.8   273   12.9 
2025-01-16 00:00 UT   17 25 39.6   -23 51 22     3.615    2.848   33.6   11.0   272   12.9 
2025-01-17 00:00 UT   17 27 16.2   -23 54 20     3.609    2.850   34.3   11.2   272   12.9 
2025-01-18 00:00 UT   17 28 52.5   -23 57 14     3.603    2.852   34.9   11.4   272   12.9 
2025-01-19 00:00 UT   17 30 28.5   -24 00 05     3.597    2.854   35.6   11.6   272   12.9 
2025-01-20 00:00 UT   17 32 04.2   -24 02 53     3.591    2.856   36.2   11.7   272   12.9 
2025-01-21 00:00 UT   17 33 39.5   -24 05 37     3.584    2.859   36.9   11.9   272   12.9 
2025-01-22 00:00 UT   17 35 14.6   -24 08 17     3.578    2.861   37.5   12.1   271   12.9 
2025-01-23 00:00 UT   17 36 49.3   -24 10 55     3.571    2.863   38.2   12.3   271   12.9 
2025-01-24 00:00 UT   17 38 23.7   -24 13 29     3.564    2.865   38.8   12.4   271   12.9 
2025-01-25 00:00 UT   17 39 57.7   -24 15 60     3.557    2.867   39.5   12.6   271   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.