(161) Athor
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	23 Feb 2026	12.9	2.680 AU	1.700 AU	10h42m	+18°54'	170.1°	3.7°
Today	29 Mar 2026	13.5	2.659 AU	1.823 AU	10h11m	+19°40'	139.2°	14.2°

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 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)                : 181.32449
            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
2026-03-29 00:00 UT   10 11 18.0   +19 40 54     1.823    2.659  139.2   14.2   120   13.5 
2026-03-29 16:30 UT   10 10 53.2   +19 39 48     1.828    2.659  138.4   14.4   120   13.5 
2026-03-30 00:00 UT   10 10 42.2   +19 39 17     1.830    2.658  138.1   14.5   120   13.6 
2026-03-31 00:00 UT   10 10 08.0   +19 37 29     1.838    2.658  137.0   14.8   119   13.6 
2026-04-01 00:00 UT   10 09 35.5   +19 35 32     1.847    2.657  135.9   15.2   119   13.6 
2026-04-02 00:00 UT   10 09 04.6   +19 33 25     1.855    2.656  134.9   15.5   118   13.6 
2026-04-03 00:00 UT   10 08 35.3   +19 31 08     1.863    2.656  133.8   15.8   118   13.6 
2026-04-04 00:00 UT   10 08 07.7   +19 28 42     1.872    2.655  132.8   16.0   118   13.7 
2026-04-05 00:00 UT   10 07 41.8   +19 26 06     1.881    2.654  131.8   16.3   117   13.7 
2026-04-06 00:00 UT   10 07 17.6   +19 23 22     1.890    2.653  130.7   16.6   117   13.7 
2026-04-07 00:00 UT   10 06 55.0   +19 20 28     1.899    2.652  129.7   16.9   117   13.7 
2026-04-08 00:00 UT   10 06 34.2   +19 17 26     1.908    2.652  128.7   17.1   116   13.7 
2026-04-09 00:00 UT   10 06 15.0   +19 14 14     1.918    2.651  127.7   17.4   116   13.7 
2026-04-10 00:00 UT   10 05 57.5   +19 10 55     1.927    2.650  126.6   17.7   116   13.8 
2026-04-11 00:00 UT   10 05 41.7   +19 07 26     1.937    2.649  125.6   17.9   116   13.8 
2026-04-12 00:00 UT   10 05 27.7   +19 03 50     1.947    2.649  124.7   18.1   115   13.8 
2026-04-13 00:00 UT   10 05 15.3   +19 00 05     1.957    2.648  123.7   18.4   115   13.8 
2026-04-14 00:00 UT   10 05 04.5   +18 56 12     1.967    2.647  122.7   18.6   115   13.8 
2026-04-15 00:00 UT   10 04 55.5   +18 52 11     1.978    2.646  121.7   18.8   115   13.9 
2026-04-16 00:00 UT   10 04 48.1   +18 48 03     1.988    2.645  120.7   19.0   114   13.9 
2026-04-17 00:00 UT   10 04 42.5   +18 43 46     1.999    2.645  119.8   19.2   114   13.9 
2026-04-18 00:00 UT   10 04 38.4   +18 39 22     2.009    2.644  118.8   19.4   114   13.9 
2026-04-19 00:00 UT   10 04 36.1   +18 34 51     2.020    2.643  117.9   19.6   114   13.9 
2026-04-20 00:00 UT   10 04 35.3   +18 30 13     2.031    2.642  116.9   19.8   114   13.9 
2026-04-21 00:00 UT   10 04 36.2   +18 25 27     2.042    2.641  116.0   20.0   114   14.0 
2026-04-22 00:00 UT   10 04 38.7   +18 20 34     2.053    2.640  115.1   20.2   113   14.0 
2026-04-23 00:00 UT   10 04 42.8   +18 15 35     2.064    2.640  114.1   20.3   113   14.0 
2026-04-24 00:00 UT   10 04 48.5   +18 10 28     2.075    2.639  113.2   20.5   113   14.0 
2026-04-25 00:00 UT   10 04 55.7   +18 05 15     2.086    2.638  112.3   20.7   113   14.0 
2026-04-26 00:00 UT   10 05 04.5   +17 59 56     2.098    2.637  111.4   20.8   113   14.0 
2026-04-27 00:00 UT   10 05 14.8   +17 54 30     2.109    2.636  110.5   20.9   113   14.1 
2026-04-28 00:00 UT   10 05 26.6   +17 48 59     2.121    2.635  109.6   21.1   113   14.1 

    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.