(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Apr 2026	11.9	2.950 AU	1.973 AU	14h27m	-12°35'	164.0°	5.4°
Opposition	25 Apr 2026	11.5	2.951 AU	1.945 AU	14h15m	-13°00'	178.9°	0.4°

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 Bertha are:

            e (Eccentricity)                : 0.0770252
            a (Semimajor axis)              : 3.1931929
            i (Inclination)                 : 21.02228
            Ω (Longitude of ascending node) : 36.47724
            ω (Argument of perihelion)      : 167.95947
            M (Mean anomaly)                : 342.62841
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 25.21694
            B (Latitude of perihelion)      : 4.29160
            P (Orbital period in years)     : 5.71            
        

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
2026-04-13 00:00 UT   14 27 11.3   -12 35 45     1.973    2.950  164.0    5.4   282   11.9 
2026-04-13 16:38 UT   14 26 33.6   -12 37 15     1.970    2.950  164.9    5.1   282   11.9 
2026-04-14 00:00 UT   14 26 16.8   -12 37 54     1.969    2.950  165.2    5.0   282   11.9 
2026-04-15 00:00 UT   14 25 21.6   -12 40 01     1.965    2.950  166.4    4.6   282   11.9 
2026-04-16 00:00 UT   14 24 25.7   -12 42 06     1.962    2.950  167.6    4.2   282   11.8 
2026-04-17 00:00 UT   14 23 29.1   -12 44 10     1.959    2.950  168.8    3.8   282   11.8 
2026-04-18 00:00 UT   14 22 32.0   -12 46 12     1.956    2.950  170.0    3.4   281   11.8 
2026-04-19 00:00 UT   14 21 34.3   -12 48 12     1.954    2.950  171.2    3.0   281   11.8 
2026-04-20 00:00 UT   14 20 36.2   -12 50 11     1.952    2.950  172.4    2.6   281   11.7 
2026-04-21 00:00 UT   14 19 37.7   -12 52 09     1.950    2.951  173.6    2.2   280   11.7 
2026-04-22 00:00 UT   14 18 38.9   -12 54 06     1.948    2.951  174.8    1.8   279   11.7 
2026-04-23 00:00 UT   14 17 39.8   -12 56 02     1.947    2.951  175.9    1.4   278   11.6 
2026-04-24 00:00 UT   14 16 40.5   -12 57 57     1.946    2.951  177.1    1.0   276   11.6 
2026-04-25 00:00 UT   14 15 41.0   -12 59 51     1.946    2.951  178.3    0.6   270   11.6 
2026-04-26 00:00 UT   14 14 41.5   -13 01 44     1.945    2.951  179.4    0.2   241   11.5 
2026-04-27 00:00 UT   14 13 41.9   -13 03 37     1.945    2.951  179.1    0.3   133   11.5 
2026-04-28 00:00 UT   14 12 42.3   -13 05 29     1.945    2.952  178.0    0.7   116   11.6 
2026-04-29 00:00 UT   14 11 42.8   -13 07 20     1.946    2.952  176.8    1.1   112   11.6 
2026-04-30 00:00 UT   14 10 43.4   -13 09 12     1.947    2.952  175.6    1.5   110   11.6 
2026-05-01 00:00 UT   14 09 44.2   -13 11 03     1.948    2.952  174.5    1.9   109   11.7 
2026-05-02 00:00 UT   14 08 45.3   -13 12 54     1.949    2.952  173.3    2.3   108   11.7 
2026-05-03 00:00 UT   14 07 46.7   -13 14 46     1.951    2.952  172.1    2.7   107   11.7 
2026-05-04 00:00 UT   14 06 48.4   -13 16 37     1.953    2.952  170.9    3.1   107   11.8 
2026-05-05 00:00 UT   14 05 50.5   -13 18 29     1.955    2.953  169.7    3.5   107   11.8 
2026-05-06 00:00 UT   14 04 53.1   -13 20 21     1.957    2.953  168.5    3.9   107   11.8 
2026-05-07 00:00 UT   14 03 56.3   -13 22 13     1.960    2.953  167.4    4.3   107   11.8 
2026-05-08 00:00 UT   14 02 59.9   -13 24 06     1.963    2.953  166.2    4.7   107   11.9 
2026-05-09 00:00 UT   14 02 04.2   -13 26 00     1.967    2.953  165.0    5.1   106   11.9 
2026-05-10 00:00 UT   14 01 09.2   -13 27 55     1.970    2.954  163.8    5.5   106   11.9 
2026-05-11 00:00 UT   14 00 14.9   -13 29 51     1.974    2.954  162.7    5.8   106   11.9 
2026-05-12 00:00 UT   13 59 21.4   -13 31 48     1.979    2.954  161.5    6.2   106   12.0 
2026-05-13 00:00 UT   13 58 28.7   -13 33 47     1.983    2.954  160.3    6.6   106   12.0 

    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.