(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Aug 2026	11.7	3.064 AU	2.127 AU	23h51m	-16°44'	153.2°	8.6°
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)                : 0.2313135
            a (Semimajor axis)              : 2.6286617
            i (Inclination)                 : 10.10773
            Ω (Longitude of ascending node) : 66.47956
            ω (Argument of perihelion)      : 61.67082
            M (Mean anomaly)                : 216.40252
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 127.77442
            B (Latitude of perihelion)      : 8.88670
            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
2026-08-22 00:00 UT   23 51 53.9   -16 44 17     2.127    3.064  153.2    8.6   277   11.7 
2026-08-22 12:27 UT   23 51 33.8   -16 47 34     2.124    3.063  153.7    8.4   277   11.7 
2026-08-23 00:00 UT   23 51 14.9   -16 50 36     2.121    3.063  154.1    8.3   278   11.7 
2026-08-24 00:00 UT   23 50 34.9   -16 56 55     2.115    3.061  155.1    8.0   280   11.7 
2026-08-25 00:00 UT   23 49 53.7   -17 03 14     2.109    3.060  156.0    7.7   282   11.7 
2026-08-26 00:00 UT   23 49 11.6   -17 09 32     2.103    3.058  156.8    7.5   283   11.7 
2026-08-27 00:00 UT   23 48 28.4   -17 15 49     2.098    3.057  157.7    7.2   285   11.6 
2026-08-28 00:00 UT   23 47 44.3   -17 22 04     2.092    3.055  158.6    6.9   288   11.6 
2026-08-29 00:00 UT   23 46 59.3   -17 28 18     2.088    3.054  159.4    6.7   290   11.6 
2026-08-30 00:00 UT   23 46 13.3   -17 34 29     2.083    3.052  160.2    6.4   293   11.6 
2026-08-31 00:00 UT   23 45 26.6   -17 40 38     2.079    3.051  160.9    6.2   295   11.6 
2026-09-01 00:00 UT   23 44 38.9   -17 46 44     2.075    3.049  161.6    6.0   298   11.5 
2026-09-02 00:00 UT   23 43 50.5   -17 52 46     2.071    3.048  162.3    5.8   301   11.5 
2026-09-03 00:00 UT   23 43 01.4   -17 58 44     2.067    3.046  162.9    5.6   305   11.5 
2026-09-04 00:00 UT   23 42 11.6   -18 04 39     2.064    3.044  163.5    5.4   309   11.5 
2026-09-05 00:00 UT   23 41 21.1   -18 10 28     2.061    3.043  164.0    5.3   313   11.5 
2026-09-06 00:00 UT   23 40 30.0   -18 16 13     2.058    3.041  164.4    5.1   317   11.5 
2026-09-07 00:00 UT   23 39 38.3   -18 21 52     2.056    3.040  164.7    5.0   321   11.5 
2026-09-08 00:00 UT   23 38 46.1   -18 27 25     2.054    3.038  165.0    4.9   325   11.5 
2026-09-09 00:00 UT   23 37 53.5   -18 32 52     2.052    3.037  165.1    4.9   330   11.5 
2026-09-10 00:00 UT   23 37 00.5   -18 38 12     2.050    3.035  165.2    4.9   335   11.5 
2026-09-11 00:00 UT   23 36 07.1   -18 43 26     2.049    3.034  165.2    4.9   340   11.5 
2026-09-12 00:00 UT   23 35 13.4   -18 48 31     2.048    3.032  165.1    4.9   344   11.5 
2026-09-13 00:00 UT   23 34 19.5   -18 53 29     2.048    3.030  164.9    5.0   349   11.5 
2026-09-14 00:00 UT   23 33 25.4   -18 58 19     2.047    3.029  164.6    5.1   353   11.5 
2026-09-15 00:00 UT   23 32 31.2   -19 03 00     2.047    3.027  164.2    5.2   358   11.5 
2026-09-16 00:00 UT   23 31 37.0   -19 07 33     2.047    3.026  163.7    5.3     2   11.5 
2026-09-17 00:00 UT   23 30 42.7   -19 11 56     2.048    3.024  163.2    5.5     6   11.5 
2026-09-18 00:00 UT   23 29 48.4   -19 16 10     2.048    3.022  162.6    5.7     9   11.5 
2026-09-19 00:00 UT   23 28 54.3   -19 20 15     2.049    3.021  162.0    5.9    12   11.5 
2026-09-20 00:00 UT   23 28 00.3   -19 24 09     2.051    3.019  161.3    6.1    16   11.5 
2026-09-21 00:00 UT   23 27 06.6   -19 27 54     2.052    3.017  160.5    6.4    19   11.5 

    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.