(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 Apr 2025	12.5	3.034 AU	2.562 AU	19h17m	-26°53'	108.4°	18.3°
Opposition	1 Jul 2025	11.5	3.126 AU	2.117 AU	18h44m	-31°18'	171.8°	2.7°

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)                : 0.2311485
            a (Semimajor axis)              : 2.6289758
            i (Inclination)                 : 10.10886
            Ω (Longitude of ascending node) : 66.49104
            ω (Argument of perihelion)      : 61.61349
            M (Mean anomaly)                : 123.98241
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 127.72799
            B (Latitude of perihelion)      : 8.88285
            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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-04-26 00:00 UT   19 17 14.3   -26 53 08     2.562    3.034  108.4   18.3   264   12.5 
2025-04-26 00:14 UT   19 17 14.5   -26 53 10     2.562    3.034  108.4   18.3   264   12.5 
2025-04-27 00:00 UT   19 17 32.0   -26 56 02     2.550    3.035  109.3   18.2   264   12.5 
2025-04-28 00:00 UT   19 17 48.2   -26 58 60     2.538    3.037  110.2   18.1   264   12.5 
2025-04-29 00:00 UT   19 18 03.0   -27 02 01     2.527    3.039  111.1   18.0   264   12.5 
2025-04-30 00:00 UT   19 18 16.3   -27 05 06     2.515    3.040  112.1   17.9   264   12.5 
2025-05-01 00:00 UT   19 18 28.2   -27 08 15     2.503    3.042  113.0   17.8   264   12.5 
2025-05-02 00:00 UT   19 18 38.6   -27 11 28     2.492    3.043  113.9   17.6   264   12.5 
2025-05-03 00:00 UT   19 18 47.5   -27 14 45     2.480    3.045  114.9   17.5   265   12.4 
2025-05-04 00:00 UT   19 18 54.9   -27 18 05     2.469    3.046  115.8   17.3   265   12.4 
2025-05-05 00:00 UT   19 19 00.8   -27 21 30     2.458    3.048  116.8   17.2   265   12.4 
2025-05-06 00:00 UT   19 19 05.2   -27 24 57     2.447    3.049  117.7   17.0   265   12.4 
2025-05-07 00:00 UT   19 19 08.0   -27 28 29     2.436    3.051  118.7   16.9   265   12.4 
2025-05-08 00:00 UT   19 19 09.4   -27 32 05     2.425    3.052  119.6   16.7   265   12.4 
2025-05-09 00:00 UT   19 19 09.1   -27 35 44     2.414    3.054  120.6   16.5   265   12.4 
2025-05-10 00:00 UT   19 19 07.4   -27 39 26     2.403    3.055  121.6   16.4   266   12.3 
2025-05-11 00:00 UT   19 19 04.1   -27 43 12     2.393    3.057  122.5   16.2   266   12.3 
2025-05-12 00:00 UT   19 18 59.2   -27 47 02     2.382    3.058  123.5   16.0   266   12.3 
2025-05-13 00:00 UT   19 18 52.8   -27 50 55     2.372    3.060  124.5   15.8   266   12.3 
2025-05-14 00:00 UT   19 18 44.8   -27 54 51     2.362    3.061  125.5   15.6   266   12.3 
2025-05-15 00:00 UT   19 18 35.2   -27 58 51     2.352    3.063  126.5   15.4   267   12.3 
2025-05-16 00:00 UT   19 18 24.1   -28 02 53     2.342    3.064  127.5   15.2   267   12.3 
2025-05-17 00:00 UT   19 18 11.4   -28 06 59     2.332    3.066  128.5   15.0   267   12.2 
2025-05-18 00:00 UT   19 17 57.0   -28 11 08     2.323    3.067  129.5   14.7   267   12.2 
2025-05-19 00:00 UT   19 17 41.1   -28 15 20     2.313    3.069  130.5   14.5   267   12.2 
2025-05-20 00:00 UT   19 17 23.6   -28 19 34     2.304    3.070  131.6   14.3   268   12.2 
2025-05-21 00:00 UT   19 17 04.5   -28 23 51     2.295    3.072  132.6   14.0   268   12.2 
2025-05-22 00:00 UT   19 16 43.9   -28 28 11     2.286    3.073  133.6   13.8   268   12.2 
2025-05-23 00:00 UT   19 16 21.6   -28 32 33     2.277    3.074  134.6   13.5   269   12.1 
2025-05-24 00:00 UT   19 15 57.8   -28 36 57     2.269    3.076  135.7   13.3   269   12.1 
2025-05-25 00:00 UT   19 15 32.4   -28 41 23     2.261    3.077  136.7   13.0   269   12.1 
2025-05-26 00:00 UT   19 15 05.4   -28 45 51     2.252    3.079  137.8   12.8   270   12.1 

    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.