(405) Thia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 May 2025	15.0	3.205 AU	4.064 AU	01h21m	+17°15'	27.8°	8.5°
Opposition	5 Nov 2025	13.3	3.156 AU	2.173 AU	02h33m	+24°46'	170.8°	2.9°

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 Thia are:

            e (Eccentricity)                : 0.2434546
            a (Semimajor axis)              : 2.5840855
            i (Inclination)                 : 11.93836
            Ω (Longitude of ascending node) : 255.19110
            ω (Argument of perihelion)      : 308.52205
            M (Mean anomaly)                : 166.69047
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 204.32509
            B (Latitude of perihelion)      : -9.31372
            P (Orbital period in years)     : 4.15            
        

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
2025-05-13 00:00 UT   01 21 55.1   +17 15 38     4.064    3.205   27.8    8.5   263   15.0 
2025-05-13 05:05 UT   01 22 11.4   +17 17 13     4.062    3.205   28.0    8.5   263   15.0 
2025-05-14 00:00 UT   01 23 12.1   +17 23 04     4.058    3.205   28.4    8.6   263   15.0 
2025-05-15 00:00 UT   01 24 28.9   +17 30 29     4.052    3.206   29.1    8.8   263   15.0 
2025-05-16 00:00 UT   01 25 45.6   +17 37 52     4.045    3.206   29.7    9.0   262   15.0 
2025-05-17 00:00 UT   01 27 02.2   +17 45 14     4.039    3.206   30.3    9.1   262   15.0 
2025-05-18 00:00 UT   01 28 18.6   +17 52 35     4.032    3.207   30.9    9.3   262   15.0 
2025-05-19 00:00 UT   01 29 34.8   +17 59 54     4.026    3.207   31.5    9.5   261   15.0 
2025-05-20 00:00 UT   01 30 50.9   +18 07 11     4.019    3.207   32.1    9.7   261   15.0 
2025-05-21 00:00 UT   01 32 06.9   +18 14 27     4.012    3.208   32.7    9.8   261   15.0 
2025-05-22 00:00 UT   01 33 22.7   +18 21 42     4.005    3.208   33.3   10.0   261   15.0 
2025-05-23 00:00 UT   01 34 38.3   +18 28 55     3.998    3.208   33.9   10.1   260   15.0 
2025-05-24 00:00 UT   01 35 53.7   +18 36 06     3.990    3.208   34.6   10.3   260   15.0 
2025-05-25 00:00 UT   01 37 09.0   +18 43 16     3.983    3.209   35.2   10.5   260   15.0 
2025-05-26 00:00 UT   01 38 24.0   +18 50 24     3.975    3.209   35.8   10.6   260   15.0 
2025-05-27 00:00 UT   01 39 38.9   +18 57 31     3.967    3.209   36.4   10.8   260   15.0 
2025-05-28 00:00 UT   01 40 53.6   +19 04 35     3.960    3.209   37.0   11.0   259   15.0 
2025-05-29 00:00 UT   01 42 08.1   +19 11 38     3.951    3.210   37.7   11.1   259   15.0 
2025-05-30 00:00 UT   01 43 22.3   +19 18 39     3.943    3.210   38.3   11.3   259   15.0 
2025-05-31 00:00 UT   01 44 36.4   +19 25 38     3.935    3.210   38.9   11.4   259   15.0 
2025-06-01 00:00 UT   01 45 50.2   +19 32 35     3.926    3.210   39.6   11.6   259   15.0 
2025-06-02 00:00 UT   01 47 03.8   +19 39 31     3.918    3.210   40.2   11.8   259   15.0 
2025-06-03 00:00 UT   01 48 17.2   +19 46 24     3.909    3.211   40.8   11.9   258   15.0 
2025-06-04 00:00 UT   01 49 30.3   +19 53 16     3.900    3.211   41.4   12.1   258   15.0 
2025-06-05 00:00 UT   01 50 43.2   +20 00 05     3.891    3.211   42.1   12.2   258   15.0 
2025-06-06 00:00 UT   01 51 55.8   +20 06 53     3.882    3.211   42.7   12.4   258   15.0 
2025-06-07 00:00 UT   01 53 08.2   +20 13 38     3.873    3.211   43.3   12.5   258   15.0 
2025-06-08 00:00 UT   01 54 20.4   +20 20 22     3.863    3.211   44.0   12.7   258   15.0 

    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.