(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Jul 2026	12.4	3.112 AU	2.483 AU	00h01m	-13°43'	119.5°	16.5°
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
2026-07-18 00:00 UT   00 01 16.8   -13 43 36     2.483    3.112  119.5   16.5   253   12.4 
2026-07-18 07:28 UT   00 01 18.9   -13 44 38     2.479    3.111  119.8   16.5   253   12.4 
2026-07-19 00:00 UT   00 01 23.0   -13 46 58     2.470    3.111  120.4   16.4   254   12.4 
2026-07-20 00:00 UT   00 01 27.8   -13 50 28     2.457    3.109  121.3   16.2   254   12.4 
2026-07-21 00:00 UT   00 01 31.5   -13 54 05     2.445    3.108  122.2   16.1   254   12.3 
2026-07-22 00:00 UT   00 01 33.8   -13 57 50     2.432    3.107  123.2   15.9   255   12.3 
2026-07-23 00:00 UT   00 01 34.9   -14 01 42     2.420    3.105  124.1   15.7   255   12.3 
2026-07-24 00:00 UT   00 01 34.6   -14 05 42     2.407    3.104  125.0   15.5   255   12.3 
2026-07-25 00:00 UT   00 01 33.1   -14 09 50     2.395    3.103  126.0   15.4   256   12.3 
2026-07-26 00:00 UT   00 01 30.3   -14 14 04     2.383    3.102  126.9   15.2   256   12.3 
2026-07-27 00:00 UT   00 01 26.2   -14 18 26     2.371    3.100  127.9   15.0   256   12.2 
2026-07-28 00:00 UT   00 01 20.7   -14 22 54     2.360    3.099  128.8   14.8   257   12.2 
2026-07-29 00:00 UT   00 01 14.0   -14 27 30     2.348    3.098  129.8   14.6   257   12.2 
2026-07-30 00:00 UT   00 01 05.9   -14 32 12     2.337    3.096  130.7   14.4   258   12.2 
2026-07-31 00:00 UT   00 00 56.5   -14 37 01     2.325    3.095  131.7   14.2   258   12.2 
2026-08-01 00:00 UT   00 00 45.7   -14 41 57     2.314    3.094  132.7   14.0   259   12.1 
2026-08-02 00:00 UT   00 00 33.7   -14 46 59     2.303    3.092  133.6   13.7   259   12.1 
2026-08-03 00:00 UT   00 00 20.2   -14 52 07     2.293    3.091  134.6   13.5   260   12.1 
2026-08-04 00:00 UT   00 00 05.4   -14 57 21     2.282    3.090  135.6   13.3   260   12.1 
2026-08-05 00:00 UT   23 59 49.3   -15 02 41     2.272    3.088  136.6   13.1   261   12.1 
2026-08-06 00:00 UT   23 59 31.8   -15 08 07     2.262    3.087  137.6   12.8   261   12.0 
2026-08-07 00:00 UT   23 59 13.0   -15 13 39     2.252    3.085  138.5   12.6   262   12.0 
2026-08-08 00:00 UT   23 58 52.8   -15 19 15     2.242    3.084  139.5   12.3   263   12.0 
2026-08-09 00:00 UT   23 58 31.3   -15 24 57     2.232    3.083  140.5   12.1   263   12.0 
2026-08-10 00:00 UT   23 58 08.4   -15 30 43     2.223    3.081  141.5   11.8   264   12.0 
2026-08-11 00:00 UT   23 57 44.2   -15 36 34     2.214    3.080  142.5   11.6   265   11.9 
2026-08-12 00:00 UT   23 57 18.7   -15 42 29     2.205    3.078  143.5   11.3   266   11.9 
2026-08-13 00:00 UT   23 56 51.8   -15 48 28     2.196    3.077  144.5   11.0   266   11.9 
2026-08-14 00:00 UT   23 56 23.7   -15 54 30     2.187    3.076  145.4   10.8   267   11.9 
2026-08-15 00:00 UT   23 55 54.3   -16 00 36     2.179    3.074  146.4   10.5   268   11.9 
2026-08-16 00:00 UT   23 55 23.6   -16 06 44     2.171    3.073  147.4   10.2   269   11.8 
2026-08-17 00:00 UT   23 54 51.7   -16 12 55     2.163    3.071  148.4   10.0   270   11.8 

    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.