(23) Thalia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Jun 2025	11.7	3.108 AU	2.129 AU	18h59m	-30°24'	161.3°	6.0°
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) : 66.49105
            ω (Argument of perihelion)      : 61.61349
            M (Mean anomaly)                : 123.98241
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 127.72800
            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
2025-06-17 00:00 UT   18 59 19.8   -30 24 50     2.129    3.108  161.3    6.0   287   11.7 
2025-06-17 05:47 UT   18 59 06.4   -30 25 50     2.128    3.109  161.5    5.9   288   11.7 
2025-06-18 00:00 UT   18 58 23.7   -30 29 00     2.126    3.110  162.3    5.7   289   11.7 
2025-06-19 00:00 UT   18 57 26.7   -30 33 07     2.124    3.111  163.3    5.4   291   11.7 
2025-06-20 00:00 UT   18 56 28.9   -30 37 10     2.122    3.112  164.3    5.1   294   11.7 
2025-06-21 00:00 UT   18 55 30.4   -30 41 09     2.120    3.113  165.3    4.7   296   11.6 
2025-06-22 00:00 UT   18 54 31.2   -30 45 04     2.118    3.115  166.3    4.4   299   11.6 
2025-06-23 00:00 UT   18 53 31.5   -30 48 54     2.117    3.116  167.2    4.2   302   11.6 
2025-06-24 00:00 UT   18 52 31.2   -30 52 40     2.116    3.117  168.0    3.9   306   11.6 
2025-06-25 00:00 UT   18 51 30.3   -30 56 21     2.115    3.118  168.9    3.6   310   11.6 
2025-06-26 00:00 UT   18 50 29.1   -30 59 57     2.114    3.119  169.6    3.4   315   11.6 
2025-06-27 00:00 UT   18 49 27.5   -31 03 28     2.114    3.121  170.3    3.2   321   11.5 
2025-06-28 00:00 UT   18 48 25.6   -31 06 53     2.114    3.122  170.9    3.0   328   11.5 
2025-06-29 00:00 UT   18 47 23.5   -31 10 13     2.114    3.123  171.3    2.8   335   11.5 
2025-06-30 00:00 UT   18 46 21.2   -31 13 27     2.115    3.124  171.6    2.7   342   11.5 
2025-07-01 00:00 UT   18 45 18.8   -31 16 35     2.116    3.126  171.7    2.7   351   11.5 
2025-07-02 00:00 UT   18 44 16.3   -31 19 37     2.117    3.127  171.7    2.7   359   11.5 
2025-07-03 00:00 UT   18 43 13.9   -31 22 34     2.119    3.128  171.5    2.7     7   11.5 
2025-07-04 00:00 UT   18 42 11.5   -31 25 24     2.120    3.129  171.2    2.8    15   11.5 
2025-07-05 00:00 UT   18 41 09.3   -31 28 08     2.123    3.130  170.7    3.0    22   11.5 
2025-07-06 00:00 UT   18 40 07.3   -31 30 46     2.125    3.131  170.1    3.2    28   11.6 
2025-07-07 00:00 UT   18 39 05.6   -31 33 17     2.128    3.133  169.5    3.4    34   11.6 
2025-07-08 00:00 UT   18 38 04.2   -31 35 43     2.130    3.134  168.7    3.6    38   11.6 
2025-07-09 00:00 UT   18 37 03.1   -31 38 02     2.134    3.135  167.9    3.9    43   11.6 
2025-07-10 00:00 UT   18 36 02.6   -31 40 14     2.137    3.136  167.0    4.2    46   11.6 
2025-07-11 00:00 UT   18 35 02.5   -31 42 20     2.141    3.137  166.1    4.5    49   11.7 
2025-07-12 00:00 UT   18 34 02.9   -31 44 20     2.145    3.138  165.1    4.8    52   11.7 
2025-07-13 00:00 UT   18 33 04.0   -31 46 14     2.149    3.139  164.1    5.1    55   11.7 
2025-07-14 00:00 UT   18 32 05.8   -31 48 01     2.154    3.140  163.1    5.4    57   11.7 
2025-07-15 00:00 UT   18 31 08.2   -31 49 42     2.159    3.142  162.1    5.7    59   11.7 
2025-07-16 00:00 UT   18 30 11.4   -31 51 16     2.164    3.143  161.1    6.0    61   11.8 
2025-07-17 00:00 UT   18 29 15.4   -31 52 45     2.169    3.144  160.1    6.3    62   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.