(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Mar 2026	13.3	3.215 AU	3.985 AU	22h20m	-18°43'	34.6°	10.2°
Opposition	9 Sep 2026	11.5	3.036 AU	2.051 AU	23h37m	-18°35'	165.2°	4.9°

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)                : 0.2312418
            a (Semimajor axis)              : 2.6288771
            i (Inclination)                 : 10.10821
            Ω (Longitude of ascending node) : 66.48766
            ω (Argument of perihelion)      : 61.63368
            M (Mean anomaly)                : 170.19674
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 127.74502
            B (Latitude of perihelion)      : 8.88398
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-03-25 00:00 UT   22 20 27.6   -18 43 21     3.985    3.215   34.6   10.2   237   13.3 
2026-03-25 02:08 UT   22 20 34.7   -18 42 49     3.984    3.215   34.7   10.2   237   13.3 
2026-03-26 00:00 UT   22 21 47.1   -18 37 21     3.977    3.215   35.3   10.3   237   13.3 
2026-03-27 00:00 UT   22 23 06.3   -18 31 22     3.968    3.214   35.9   10.5   238   13.3 
2026-03-28 00:00 UT   22 24 25.2   -18 25 25     3.959    3.213   36.6   10.7   238   13.3 
2026-03-29 00:00 UT   22 25 43.9   -18 19 29     3.951    3.213   37.2   10.8   238   13.3 
2026-03-30 00:00 UT   22 27 02.2   -18 13 33     3.942    3.212   37.9   11.0   238   13.3 
2026-03-31 00:00 UT   22 28 20.3   -18 07 40     3.932    3.212   38.5   11.2   238   13.3 
2026-04-01 00:00 UT   22 29 38.1   -18 01 47     3.923    3.211   39.2   11.3   238   13.3 
2026-04-02 00:00 UT   22 30 55.7   -17 55 56     3.914    3.211   39.8   11.5   238   13.3 
2026-04-03 00:00 UT   22 32 12.9   -17 50 06     3.904    3.210   40.5   11.7   239   13.3 
2026-04-04 00:00 UT   22 33 29.8   -17 44 18     3.895    3.209   41.1   11.8   239   13.3 
2026-04-05 00:00 UT   22 34 46.5   -17 38 31     3.885    3.209   41.8   12.0   239   13.3 
2026-04-06 00:00 UT   22 36 02.9   -17 32 46     3.875    3.208   42.4   12.1   239   13.3 
2026-04-07 00:00 UT   22 37 18.9   -17 27 03     3.865    3.208   43.1   12.3   239   13.3 
2026-04-08 00:00 UT   22 38 34.7   -17 21 21     3.855    3.207   43.7   12.5   239   13.3 
2026-04-09 00:00 UT   22 39 50.1   -17 15 41     3.845    3.206   44.4   12.6   239   13.3 
2026-04-10 00:00 UT   22 41 05.2   -17 10 03     3.834    3.206   45.0   12.8   240   13.3 
2026-04-11 00:00 UT   22 42 20.1   -17 04 27     3.824    3.205   45.7   12.9   240   13.3 
2026-04-12 00:00 UT   22 43 34.5   -16 58 53     3.813    3.204   46.4   13.1   240   13.3 
2026-04-13 00:00 UT   22 44 48.7   -16 53 21     3.802    3.204   47.0   13.2   240   13.3 
2026-04-14 00:00 UT   22 46 02.5   -16 47 51     3.791    3.203   47.7   13.4   240   13.3 
2026-04-15 00:00 UT   22 47 16.0   -16 42 24     3.780    3.202   48.3   13.5   240   13.3 
2026-04-16 00:00 UT   22 48 29.2   -16 36 58     3.769    3.202   49.0   13.7   240   13.3 
2026-04-17 00:00 UT   22 49 42.0   -16 31 35     3.758    3.201   49.7   13.8   240   13.3 
2026-04-18 00:00 UT   22 50 54.5   -16 26 15     3.747    3.200   50.3   14.0   240   13.3 
2026-04-19 00:00 UT   22 52 06.6   -16 20 57     3.735    3.200   51.0   14.1   240   13.3 
2026-04-20 00:00 UT   22 53 18.3   -16 15 41     3.724    3.199   51.7   14.3   241   13.3 

    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.