(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Nov 2025	13.5	2.965 AU	3.768 AU	13h01m	+03°42'	31.2°	10.0°
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)      : 167.95948
            M (Mean anomaly)                : 342.62840
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 25.21695
            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
2025-11-05 00:00 UT   13 01 04.2   +03 42 56     3.768    2.965   31.2   10.0   309   13.5 
2025-11-05 10:19 UT   13 01 38.6   +03 38 29     3.765    2.965   31.4   10.0   309   13.5 
2025-11-06 00:00 UT   13 02 24.2   +03 32 37     3.761    2.964   31.8   10.1   308   13.5 
2025-11-07 00:00 UT   13 03 44.0   +03 22 20     3.754    2.964   32.4   10.3   308   13.5 
2025-11-08 00:00 UT   13 05 03.6   +03 12 06     3.746    2.964   32.9   10.5   307   13.5 
2025-11-09 00:00 UT   13 06 23.2   +03 01 54     3.738    2.964   33.5   10.6   307   13.5 
2025-11-10 00:00 UT   13 07 42.5   +02 51 45     3.731    2.963   34.1   10.8   307   13.5 
2025-11-11 00:00 UT   13 09 01.7   +02 41 38     3.723    2.963   34.7   11.0   306   13.5 
2025-11-12 00:00 UT   13 10 20.7   +02 31 33     3.715    2.963   35.3   11.1   306   13.6 
2025-11-13 00:00 UT   13 11 39.6   +02 21 31     3.706    2.962   35.9   11.3   305   13.6 
2025-11-14 00:00 UT   13 12 58.2   +02 11 32     3.698    2.962   36.5   11.5   305   13.6 
2025-11-15 00:00 UT   13 14 16.7   +02 01 35     3.690    2.962   37.1   11.6   305   13.6 
2025-11-16 00:00 UT   13 15 35.0   +01 51 40     3.681    2.962   37.8   11.8   304   13.6 
2025-11-17 00:00 UT   13 16 53.1   +01 41 49     3.672    2.961   38.4   12.0   304   13.6 
2025-11-18 00:00 UT   13 18 10.9   +01 31 60     3.664    2.961   39.0   12.1   304   13.6 
2025-11-19 00:00 UT   13 19 28.6   +01 22 13     3.655    2.961   39.6   12.3   303   13.6 
2025-11-20 00:00 UT   13 20 46.1   +01 12 30     3.646    2.961   40.2   12.4   303   13.6 
2025-11-21 00:00 UT   13 22 03.3   +01 02 49     3.636    2.960   40.8   12.6   303   13.6 
2025-11-22 00:00 UT   13 23 20.3   +00 53 11     3.627    2.960   41.5   12.8   302   13.6 
2025-11-23 00:00 UT   13 24 37.1   +00 43 36     3.618    2.960   42.1   12.9   302   13.6 
2025-11-24 00:00 UT   13 25 53.6   +00 34 04     3.608    2.960   42.7   13.1   302   13.6 
2025-11-25 00:00 UT   13 27 09.9   +00 24 35     3.598    2.959   43.4   13.2   301   13.6 
2025-11-26 00:00 UT   13 28 26.0   +00 15 09     3.589    2.959   44.0   13.4   301   13.6 
2025-11-27 00:00 UT   13 29 41.8   +00 05 45     3.579    2.959   44.6   13.6   301   13.6 
2025-11-28 00:00 UT   13 30 57.3   +00 03 35     3.569    2.959   45.3   13.7   301   13.6 

    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.