(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	9 Sep 2026	11.5	3.036 AU	2.051 AU	23h37m	-18°35'	165.2°	4.9°
Today	8 Nov 2026	12.2	2.932 AU	2.391 AU	23h01m	-18°47'	113.6°	18.0°

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) : 66.47957
            ω (Argument of perihelion)      : 61.67080
            M (Mean anomaly)                : 216.40252
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 127.77441
            B (Latitude of perihelion)      : 8.88669
            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
2026-11-08 00:00 UT   23 01 56.1   -18 47 34     2.391    2.932  113.6   18.0    62   12.2 
2026-11-08 07:43 UT   23 01 56.2   -18 45 58     2.395    2.931  113.3   18.1    62   12.2 
2026-11-09 00:00 UT   23 01 56.8   -18 42 34     2.402    2.930  112.6   18.2    62   12.2 
2026-11-10 00:00 UT   23 01 58.9   -18 37 26     2.414    2.928  111.7   18.3    62   12.3 
2026-11-11 00:00 UT   23 02 02.4   -18 32 10     2.425    2.926  110.8   18.4    62   12.3 
2026-11-12 00:00 UT   23 02 07.3   -18 26 46     2.436    2.924  109.9   18.6    63   12.3 
2026-11-13 00:00 UT   23 02 13.6   -18 21 15     2.447    2.922  108.9   18.7    63   12.3 
2026-11-14 00:00 UT   23 02 21.3   -18 15 36     2.459    2.921  108.0   18.8    63   12.3 
2026-11-15 00:00 UT   23 02 30.3   -18 09 50     2.470    2.919  107.1   18.9    63   12.3 
2026-11-16 00:00 UT   23 02 40.7   -18 03 57     2.482    2.917  106.2   19.0    64   12.3 
2026-11-17 00:00 UT   23 02 52.5   -17 57 56     2.493    2.915  105.3   19.1    64   12.3 
2026-11-18 00:00 UT   23 03 05.6   -17 51 49     2.505    2.913  104.4   19.2    64   12.4 
2026-11-19 00:00 UT   23 03 20.0   -17 45 35     2.517    2.911  103.5   19.3    64   12.4 
2026-11-20 00:00 UT   23 03 35.7   -17 39 15     2.528    2.909  102.6   19.4    64   12.4 
2026-11-21 00:00 UT   23 03 52.7   -17 32 48     2.540    2.907  101.7   19.4    65   12.4 
2026-11-22 00:00 UT   23 04 11.0   -17 26 14     2.552    2.905  100.9   19.5    65   12.4 
2026-11-23 00:00 UT   23 04 30.5   -17 19 35     2.564    2.903  100.0   19.6    65   12.4 
2026-11-24 00:00 UT   23 04 51.3   -17 12 49     2.576    2.901   99.1   19.6    65   12.4 
2026-11-25 00:00 UT   23 05 13.3   -17 05 58     2.588    2.899   98.3   19.7    65   12.4 
2026-11-26 00:00 UT   23 05 36.5   -16 59 00     2.600    2.897   97.4   19.7    66   12.4 
2026-11-27 00:00 UT   23 06 00.9   -16 51 57     2.612    2.895   96.5   19.8    66   12.5 
2026-11-28 00:00 UT   23 06 26.6   -16 44 48     2.624    2.893   95.7   19.8    66   12.5 
2026-11-29 00:00 UT   23 06 53.3   -16 37 34     2.636    2.891   94.8   19.9    66   12.5 
2026-11-30 00:00 UT   23 07 21.3   -16 30 14     2.648    2.889   94.0   19.9    66   12.5 
2026-12-01 00:00 UT   23 07 50.3   -16 22 49     2.660    2.887   93.1   19.9    66   12.5 
2026-12-02 00:00 UT   23 08 20.5   -16 15 18     2.672    2.885   92.3   20.0    66   12.5 
2026-12-03 00:00 UT   23 08 51.9   -16 07 42     2.684    2.883   91.5   20.0    67   12.5 
2026-12-04 00:00 UT   23 09 24.3   -16 00 01     2.696    2.881   90.6   20.0    67   12.5 
2026-12-05 00:00 UT   23 09 57.8   -15 52 15     2.708    2.879   89.8   20.0    67   12.5 
2026-12-06 00:00 UT   23 10 32.4   -15 44 24     2.720    2.877   89.0   20.0    67   12.5 
2026-12-07 00:00 UT   23 11 08.1   -15 36 28     2.732    2.875   88.2   20.0    67   12.5 
2026-12-08 00:00 UT   23 11 44.8   -15 28 28     2.744    2.873   87.4   20.0    67   12.6 

    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.