(161) Athor
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Oct 2025	14.9	2.705 AU	3.104 AU	10h04m	+19°46'	57.7°	18.1°
Opposition	23 Feb 2026	12.9	2.680 AU	1.700 AU	10h42m	+18°54'	170.1°	3.7°

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 Athor are:

            e (Eccentricity)                : 0.1376711
            a (Semimajor axis)              : 2.3799745
            i (Inclination)                 : 9.05134
            Ω (Longitude of ascending node) : 18.43670
            ω (Argument of perihelion)      : 295.41664
            M (Mean anomaly)                : 181.32450
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -45.86725
            B (Latitude of perihelion)      : -8.16895
            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
2025-10-17 00:00 UT   10 04 21.7   +19 46 31     3.104    2.705   57.7   18.1   295   14.9 
2025-10-17 05:30 UT   10 04 40.5   +19 45 08     3.101    2.705   57.8   18.2   295   14.9 
2025-10-18 00:00 UT   10 05 43.4   +19 40 30     3.093    2.705   58.3   18.3   295   14.9 
2025-10-19 00:00 UT   10 07 04.6   +19 34 30     3.081    2.705   59.0   18.4   295   14.9 
2025-10-20 00:00 UT   10 08 25.2   +19 28 32     3.069    2.706   59.6   18.5   295   14.9 
2025-10-21 00:00 UT   10 09 45.3   +19 22 36     3.058    2.706   60.3   18.6   295   14.9 
2025-10-22 00:00 UT   10 11 04.9   +19 16 42     3.046    2.706   60.9   18.8   295   14.8 
2025-10-23 00:00 UT   10 12 23.9   +19 10 51     3.034    2.706   61.6   18.9   295   14.8 
2025-10-24 00:00 UT   10 13 42.3   +19 05 02     3.022    2.706   62.2   19.0   295   14.8 
2025-10-25 00:00 UT   10 15 00.1   +18 59 16     3.010    2.706   62.9   19.1   295   14.8 
2025-10-26 00:00 UT   10 16 17.4   +18 53 32     2.998    2.706   63.6   19.2   295   14.8 
2025-10-27 00:00 UT   10 17 34.1   +18 47 51     2.986    2.707   64.3   19.3   295   14.8 
2025-10-28 00:00 UT   10 18 50.1   +18 42 12     2.974    2.707   64.9   19.4   295   14.8 
2025-10-29 00:00 UT   10 20 05.6   +18 36 37     2.961    2.707   65.6   19.5   295   14.8 
2025-10-30 00:00 UT   10 21 20.5   +18 31 04     2.949    2.707   66.3   19.6   295   14.8 
2025-10-31 00:00 UT   10 22 34.7   +18 25 35     2.936    2.707   67.0   19.7   295   14.8 
2025-11-01 00:00 UT   10 23 48.3   +18 20 08     2.924    2.707   67.7   19.8   295   14.8 
2025-11-02 00:00 UT   10 25 01.3   +18 14 45     2.911    2.707   68.3   19.9   295   14.8 
2025-11-03 00:00 UT   10 26 13.6   +18 09 25     2.899    2.707   69.0   20.0   295   14.8 
2025-11-04 00:00 UT   10 27 25.3   +18 04 09     2.886    2.707   69.7   20.1   295   14.8 
2025-11-05 00:00 UT   10 28 36.3   +17 58 56     2.873    2.707   70.4   20.2   295   14.8 
2025-11-06 00:00 UT   10 29 46.7   +17 53 46     2.860    2.707   71.1   20.3   294   14.8 
2025-11-07 00:00 UT   10 30 56.4   +17 48 41     2.847    2.707   71.8   20.4   294   14.8 
2025-11-08 00:00 UT   10 32 05.4   +17 43 39     2.834    2.707   72.6   20.4   294   14.7 
2025-11-09 00:00 UT   10 33 13.7   +17 38 41     2.821    2.707   73.3   20.5   294   14.7 
2025-11-10 00:00 UT   10 34 21.3   +17 33 47     2.808    2.708   74.0   20.6   294   14.7 
2025-11-11 00:00 UT   10 35 28.2   +17 28 57     2.795    2.708   74.7   20.7   294   14.7 
2025-11-12 00:00 UT   10 36 34.4   +17 24 12     2.782    2.708   75.4   20.7   294   14.7 
2025-11-13 00:00 UT   10 37 39.8   +17 19 30     2.768    2.708   76.1   20.8   294   14.7 

    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.