(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Mar 2026	13.2	3.225 AU	4.133 AU	21h50m	-20°57'	20.7°	6.2°
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
2026-03-03 00:00 UT   21 50 18.1   -20 57 50     4.133    3.225   20.7    6.2   230   13.2 
2026-03-03 17:50 UT   21 51 20.9   -20 53 16     4.129    3.225   21.2    6.4   230   13.2 
2026-03-04 00:00 UT   21 51 42.6   -20 51 41     4.128    3.225   21.3    6.4   231   13.2 
2026-03-05 00:00 UT   21 53 06.9   -20 45 33     4.123    3.224   22.0    6.6   231   13.2 
2026-03-06 00:00 UT   21 54 31.0   -20 39 24     4.117    3.224   22.6    6.8   232   13.2 
2026-03-07 00:00 UT   21 55 54.9   -20 33 14     4.112    3.224   23.2    7.0   232   13.2 
2026-03-08 00:00 UT   21 57 18.7   -20 27 05     4.106    3.223   23.8    7.1   232   13.2 
2026-03-09 00:00 UT   21 58 42.2   -20 20 56     4.100    3.223   24.5    7.3   233   13.2 
2026-03-10 00:00 UT   22 00 05.5   -20 14 47     4.094    3.222   25.1    7.5   233   13.2 
2026-03-11 00:00 UT   22 01 28.5   -20 08 38     4.088    3.222   25.7    7.7   234   13.2 
2026-03-12 00:00 UT   22 02 51.4   -20 02 29     4.082    3.221   26.3    7.9   234   13.2 
2026-03-13 00:00 UT   22 04 14.1   -19 56 21     4.075    3.221   27.0    8.0   234   13.2 
2026-03-14 00:00 UT   22 05 36.5   -19 50 13     4.068    3.221   27.6    8.2   235   13.2 
2026-03-15 00:00 UT   22 06 58.7   -19 44 05     4.062    3.220   28.2    8.4   235   13.3 
2026-03-16 00:00 UT   22 08 20.7   -19 37 58     4.055    3.220   28.9    8.6   235   13.3 
2026-03-17 00:00 UT   22 09 42.5   -19 31 51     4.047    3.219   29.5    8.8   235   13.3 
2026-03-18 00:00 UT   22 11 04.0   -19 25 45     4.040    3.219   30.1    8.9   236   13.3 
2026-03-19 00:00 UT   22 12 25.3   -19 19 39     4.033    3.218   30.8    9.1   236   13.3 
2026-03-20 00:00 UT   22 13 46.3   -19 13 34     4.025    3.218   31.4    9.3   236   13.3 
2026-03-21 00:00 UT   22 15 07.1   -19 07 29     4.017    3.217   32.1    9.5   236   13.3 
2026-03-22 00:00 UT   22 16 27.6   -19 01 26     4.010    3.217   32.7    9.6   237   13.3 
2026-03-23 00:00 UT   22 17 47.9   -18 55 23     4.002    3.216   33.4    9.8   237   13.3 
2026-03-24 00:00 UT   22 19 07.9   -18 49 22     3.993    3.216   34.0   10.0   237   13.3 
2026-03-25 00:00 UT   22 20 27.6   -18 43 21     3.985    3.215   34.6   10.2   237   13.3 
2026-03-26 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 

    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.