(264) Libussa
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Dec 2025	13.8	2.910 AU	3.885 AU	18h26m	-28°52'	6.5°	2.2°
Opposition	17 Aug 2026	11.9	2.598 AU	1.613 AU	22h15m	-28°53'	163.1°	6.5°

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 Libussa are:

            e (Eccentricity)                : 0.1350899
            a (Semimajor axis)              : 2.7991204
            i (Inclination)                 : 10.42509
            Ω (Longitude of ascending node) : 49.49047
            ω (Argument of perihelion)      : 340.01203
            M (Mean anomaly)                : 251.94773
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 29.80691
            B (Latitude of perihelion)      : -3.54617
            P (Orbital period in years)     : 4.68            
        

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
2025-12-31 00:00 UT   18 26 35.5   -28 52 11     3.885    2.910    6.5    2.2   208   13.8 
2025-12-31 07:58 UT   18 27 12.0   -28 52 11     3.884    2.909    6.6    2.2   210   13.8 
2026-01-01 00:00 UT   18 28 25.6   -28 52 10     3.883    2.909    6.8    2.3   213   13.8 
2026-01-02 00:00 UT   18 30 15.7   -28 52 06     3.880    2.907    7.2    2.4   216   13.8 
2026-01-03 00:00 UT   18 32 05.9   -28 51 57     3.878    2.906    7.6    2.6   220   13.8 
2026-01-04 00:00 UT   18 33 56.1   -28 51 45     3.875    2.905    8.1    2.7   223   13.8 
2026-01-05 00:00 UT   18 35 46.4   -28 51 28     3.872    2.903    8.6    2.9   225   13.9 
2026-01-06 00:00 UT   18 37 36.7   -28 51 08     3.869    2.902    9.0    3.1   227   13.9 
2026-01-07 00:00 UT   18 39 27.0   -28 50 43     3.866    2.901    9.5    3.2   230   13.9 
2026-01-08 00:00 UT   18 41 17.4   -28 50 15     3.863    2.900   10.0    3.4   231   13.9 
2026-01-09 00:00 UT   18 43 07.7   -28 49 42     3.859    2.898   10.6    3.6   233   13.9 
2026-01-10 00:00 UT   18 44 58.1   -28 49 06     3.856    2.897   11.1    3.7   235   13.9 
2026-01-11 00:00 UT   18 46 48.5   -28 48 26     3.852    2.896   11.6    3.9   236   13.9 
2026-01-12 00:00 UT   18 48 38.8   -28 47 41     3.848    2.894   12.2    4.1   237   13.9 
2026-01-13 00:00 UT   18 50 29.2   -28 46 53     3.844    2.893   12.7    4.3   238   13.9 
2026-01-14 00:00 UT   18 52 19.5   -28 46 01     3.840    2.892   13.3    4.5   239   13.9 
2026-01-15 00:00 UT   18 54 09.8   -28 45 05     3.836    2.891   13.8    4.7   240   13.9 
2026-01-16 00:00 UT   18 56 00.1   -28 44 06     3.832    2.889   14.4    4.9   241   13.9 
2026-01-17 00:00 UT   18 57 50.4   -28 43 02     3.827    2.888   15.0    5.1   241   13.9 
2026-01-18 00:00 UT   18 59 40.6   -28 41 55     3.822    2.887   15.6    5.2   242   13.9 
2026-01-19 00:00 UT   19 01 30.8   -28 40 44     3.818    2.885   16.1    5.4   243   14.0 
2026-01-20 00:00 UT   19 03 20.9   -28 39 29     3.813    2.884   16.7    5.6   243   14.0 
2026-01-21 00:00 UT   19 05 10.9   -28 38 10     3.807    2.883   17.3    5.8   244   14.0 

    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.