(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Jan 2026	13.0	3.234 AU	4.209 AU	21h05m	-24°02'	7.1°	2.2°
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
2026-01-31 00:00 UT   21 05 18.8   -24 02 57     4.209    3.234    7.1    2.2   155   13.0 
2026-01-31 14:53 UT   21 06 13.9   -23 59 25     4.209    3.234    7.1    2.2   158   13.0 
2026-02-01 00:00 UT   21 06 47.7   -23 57 16     4.209    3.234    7.1    2.2   160   13.0 
2026-02-02 00:00 UT   21 08 16.5   -23 51 33     4.209    3.234    7.1    2.2   166   13.0 
2026-02-03 00:00 UT   21 09 45.2   -23 45 48     4.209    3.234    7.2    2.2   171   13.0 
2026-02-04 00:00 UT   21 11 13.9   -23 40 02     4.209    3.233    7.3    2.2   176   13.0 
2026-02-05 00:00 UT   21 12 42.4   -23 34 15     4.208    3.233    7.5    2.3   181   13.0 
2026-02-06 00:00 UT   21 14 10.9   -23 28 27     4.207    3.233    7.7    2.3   185   13.0 
2026-02-07 00:00 UT   21 15 39.2   -23 22 37     4.206    3.233    8.0    2.4   190   13.0 
2026-02-08 00:00 UT   21 17 07.4   -23 16 45     4.205    3.232    8.3    2.5   193   13.0 
2026-02-09 00:00 UT   21 18 35.5   -23 10 53     4.204    3.232    8.7    2.6   197   13.0 
2026-02-10 00:00 UT   21 20 03.5   -23 04 59     4.203    3.232    9.1    2.8   200   13.0 
2026-02-11 00:00 UT   21 21 31.4   -22 59 04     4.201    3.232    9.5    2.9   203   13.1 
2026-02-12 00:00 UT   21 22 59.2   -22 53 08     4.199    3.231   10.0    3.0   206   13.1 
2026-02-13 00:00 UT   21 24 26.8   -22 47 11     4.197    3.231   10.4    3.2   209   13.1 
2026-02-14 00:00 UT   21 25 54.3   -22 41 12     4.195    3.231   10.9    3.3   211   13.1 
2026-02-15 00:00 UT   21 27 21.7   -22 35 13     4.193    3.231   11.4    3.5   213   13.1 
2026-02-16 00:00 UT   21 28 49.0   -22 29 13     4.190    3.230   12.0    3.6   215   13.1 
2026-02-17 00:00 UT   21 30 16.1   -22 23 12     4.188    3.230   12.5    3.8   217   13.1 
2026-02-18 00:00 UT   21 31 43.0   -22 17 10     4.185    3.230   13.0    4.0   218   13.1 
2026-02-19 00:00 UT   21 33 09.8   -22 11 07     4.182    3.229   13.6    4.1   219   13.1 
2026-02-20 00:00 UT   21 34 36.4   -22 05 04     4.179    3.229   14.2    4.3   221   13.1 
2026-02-21 00:00 UT   21 36 02.9   -21 58 60     4.175    3.229   14.7    4.5   222   13.1 
2026-02-22 00:00 UT   21 37 29.2   -21 52 55     4.172    3.228   15.3    4.6   223   13.1 
2026-02-23 00:00 UT   21 38 55.4   -21 46 49     4.168    3.228   15.9    4.8   224   13.1 
2026-02-24 00:00 UT   21 40 21.4   -21 40 44     4.164    3.228   16.5    5.0   225   13.2 

    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.