(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 May 2026	13.1	3.173 AU	3.305 AU	23h27m	-13°56'	73.7°	17.8°
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) : 66.48765
            ω (Argument of perihelion)      : 61.63368
            M (Mean anomaly)                : 170.19674
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 127.74501
            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
2026-05-22 00:00 UT   23 27 51.8   -13 56 44     3.305    3.173   73.7   17.8   244   13.1 
2026-05-22 21:10 UT   23 28 41.8   -13 53 55     3.292    3.173   74.4   17.9   244   13.1 
2026-05-23 00:00 UT   23 28 48.5   -13 53 32     3.290    3.173   74.4   17.9   244   13.1 
2026-05-24 00:00 UT   23 29 44.6   -13 50 25     3.276    3.172   75.2   18.0   244   13.1 
2026-05-25 00:00 UT   23 30 40.1   -13 47 24     3.262    3.171   75.9   18.0   244   13.1 
2026-05-26 00:00 UT   23 31 35.0   -13 44 27     3.247    3.170   76.6   18.1   244   13.1 
2026-05-27 00:00 UT   23 32 29.3   -13 41 36     3.233    3.169   77.3   18.2   244   13.1 
2026-05-28 00:00 UT   23 33 23.0   -13 38 50     3.218    3.168   78.1   18.2   244   13.1 
2026-05-29 00:00 UT   23 34 16.1   -13 36 09     3.204    3.167   78.8   18.3   244   13.1 
2026-05-30 00:00 UT   23 35 08.6   -13 33 34     3.189    3.166   79.5   18.3   244   13.0 
2026-05-31 00:00 UT   23 36 00.5   -13 31 04     3.175    3.165   80.3   18.4   245   13.0 
2026-06-01 00:00 UT   23 36 51.7   -13 28 40     3.160    3.164   81.0   18.5   245   13.0 
2026-06-02 00:00 UT   23 37 42.2   -13 26 21     3.145    3.163   81.7   18.5   245   13.0 
2026-06-03 00:00 UT   23 38 32.1   -13 24 09     3.131    3.162   82.5   18.5   245   13.0 
2026-06-04 00:00 UT   23 39 21.3   -13 22 02     3.116    3.161   83.2   18.6   245   13.0 
2026-06-05 00:00 UT   23 40 09.9   -13 20 01     3.101    3.160   84.0   18.6   245   13.0 
2026-06-06 00:00 UT   23 40 57.7   -13 18 06     3.086    3.159   84.7   18.7   245   13.0 
2026-06-07 00:00 UT   23 41 44.9   -13 16 17     3.072    3.158   85.5   18.7   245   13.0 
2026-06-08 00:00 UT   23 42 31.3   -13 14 34     3.057    3.157   86.2   18.7   246   13.0 
2026-06-09 00:00 UT   23 43 17.0   -13 12 58     3.042    3.156   87.0   18.7   246   13.0 
2026-06-10 00:00 UT   23 44 02.0   -13 11 28     3.027    3.155   87.8   18.8   246   12.9 
2026-06-11 00:00 UT   23 44 46.2   -13 10 04     3.012    3.154   88.5   18.8   246   12.9 
2026-06-12 00:00 UT   23 45 29.6   -13 08 47     2.997    3.153   89.3   18.8   246   12.9 
2026-06-13 00:00 UT   23 46 12.3   -13 07 37     2.982    3.152   90.1   18.8   246   12.9 
2026-06-14 00:00 UT   23 46 54.1   -13 06 33     2.968    3.151   90.9   18.8   246   12.9 
2026-06-15 00:00 UT   23 47 35.2   -13 05 36     2.953    3.150   91.6   18.8   246   12.9 
2026-06-16 00:00 UT   23 48 15.5   -13 04 46     2.938    3.149   92.4   18.8   247   12.9 
2026-06-17 00:00 UT   23 48 54.9   -13 04 03     2.923    3.148   93.2   18.8   247   12.9 
2026-06-18 00:00 UT   23 49 33.4   -13 03 27     2.908    3.147   94.0   18.8   247   12.8 
2026-06-19 00:00 UT   23 50 11.2   -13 02 58     2.893    3.146   94.8   18.8   247   12.8 
2026-06-20 00:00 UT   23 50 48.0   -13 02 36     2.879    3.145   95.6   18.8   247   12.8 
2026-06-21 00:00 UT   23 51 24.0   -13 02 21     2.864    3.143   96.4   18.7   247   12.8 

    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.