(115) Thyra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Dec 2025	12.6	2.169 AU	2.650 AU	20h52m	-13°34'	51.0°	20.6°
Opposition	22 Jan 2027	10.0	2.195 AU	1.211 AU	08h23m	+21°42'	177.4°	1.2°

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 Thyra are:

            e (Eccentricity)                : 0.1923562
            a (Semimajor axis)              : 2.3800179
            i (Inclination)                 : 11.58738
            Ω (Longitude of ascending node) : 308.75022
            ω (Argument of perihelion)      : 97.00177
            M (Mean anomaly)                : 301.27858
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 225.89617
            B (Latitude of perihelion)      : 11.49978
            P (Orbital period in years)     : 3.67            
        

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
2025-12-13 00:00 UT   20 52 19.4   -13 34 19     2.650    2.169   51.0   20.6    71   12.6 
2025-12-13 16:44 UT   20 53 34.3   -13 27 41     2.655    2.168   50.6   20.5    71   12.6 
2025-12-14 00:00 UT   20 54 07.0   -13 24 48     2.657    2.167   50.4   20.5    71   12.6 
2025-12-15 00:00 UT   20 55 54.9   -13 15 13     2.665    2.165   49.9   20.3    71   12.6 
2025-12-16 00:00 UT   20 57 43.1   -13 05 32     2.672    2.163   49.3   20.2    70   12.6 
2025-12-17 00:00 UT   20 59 31.7   -12 55 46     2.679    2.161   48.8   20.0    70   12.6 
2025-12-18 00:00 UT   21 01 20.7   -12 45 54     2.686    2.159   48.2   19.9    70   12.6 
2025-12-19 00:00 UT   21 03 09.9   -12 35 58     2.693    2.157   47.7   19.7    70   12.6 
2025-12-20 00:00 UT   21 04 59.5   -12 25 56     2.700    2.155   47.2   19.6    69   12.6 
2025-12-21 00:00 UT   21 06 49.3   -12 15 49     2.706    2.153   46.6   19.4    69   12.6 
2025-12-22 00:00 UT   21 08 39.5   -12 05 37     2.713    2.151   46.1   19.2    69   12.6 
2025-12-23 00:00 UT   21 10 29.9   -11 55 20     2.719    2.149   45.6   19.1    69   12.6 
2025-12-24 00:00 UT   21 12 20.7   -11 44 57     2.726    2.147   45.0   18.9    69   12.6 
2025-12-25 00:00 UT   21 14 11.7   -11 34 30     2.732    2.145   44.5   18.8    68   12.5 
2025-12-26 00:00 UT   21 16 03.0   -11 23 57     2.739    2.143   44.0   18.6    68   12.5 
2025-12-27 00:00 UT   21 17 54.5   -11 13 19     2.745    2.140   43.4   18.4    68   12.5 
2025-12-28 00:00 UT   21 19 46.3   -11 02 36     2.751    2.138   42.9   18.3    68   12.5 
2025-12-29 00:00 UT   21 21 38.3   -10 51 48     2.757    2.136   42.4   18.1    67   12.5 
2025-12-30 00:00 UT   21 23 30.6   -10 40 55     2.763    2.134   41.9   17.9    67   12.5 

    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.