(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	25 Apr 2026	11.5	2.951 AU	1.945 AU	14h15m	-13°00'	178.9°	0.4°
Today	23 May 2026	12.2	2.956 AU	2.042 AU	13h50m	-13°55'	149.0°	10.2°

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 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)                : 342.62840
            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
2026-05-23 00:00 UT   13 50 35.9   -13 55 16     2.042    2.956  149.0   10.2   107   12.2 
2026-05-23 01:41 UT   13 50 32.9   -13 55 26     2.042    2.956  148.9   10.2   107   12.2 
2026-05-24 00:00 UT   13 49 54.9   -13 57 39     2.049    2.956  147.9   10.5   107   12.2 
2026-05-25 00:00 UT   13 49 15.1   -14 00 04     2.057    2.957  146.8   10.8   107   12.2 
2026-05-26 00:00 UT   13 48 36.6   -14 02 32     2.064    2.957  145.7   11.1   107   12.3 
2026-05-27 00:00 UT   13 47 59.5   -14 05 03     2.072    2.957  144.6   11.4   107   12.3 
2026-05-28 00:00 UT   13 47 23.6   -14 07 37     2.080    2.957  143.5   11.7   107   12.3 
2026-05-29 00:00 UT   13 46 49.1   -14 10 15     2.089    2.957  142.5   12.1   107   12.3 
2026-05-30 00:00 UT   13 46 15.9   -14 12 56     2.097    2.958  141.4   12.3   107   12.4 
2026-05-31 00:00 UT   13 45 44.2   -14 15 40     2.106    2.958  140.3   12.6   107   12.4 
2026-06-01 00:00 UT   13 45 13.7   -14 18 27     2.115    2.958  139.3   12.9   107   12.4 
2026-06-02 00:00 UT   13 44 44.7   -14 21 18     2.124    2.958  138.2   13.2   107   12.4 
2026-06-03 00:00 UT   13 44 17.1   -14 24 13     2.133    2.959  137.2   13.5   107   12.4 
2026-06-04 00:00 UT   13 43 50.9   -14 27 11     2.143    2.959  136.1   13.7   107   12.4 
2026-06-05 00:00 UT   13 43 26.1   -14 30 13     2.153    2.959  135.1   14.0   107   12.5 
2026-06-06 00:00 UT   13 43 02.7   -14 33 18     2.162    2.959  134.1   14.3   108   12.5 
2026-06-07 00:00 UT   13 42 40.8   -14 36 27     2.172    2.960  133.0   14.5   108   12.5 
2026-06-08 00:00 UT   13 42 20.3   -14 39 40     2.183    2.960  132.0   14.8   108   12.5 
2026-06-09 00:00 UT   13 42 01.2   -14 42 57     2.193    2.960  131.0   15.0   108   12.5 
2026-06-10 00:00 UT   13 41 43.6   -14 46 18     2.204    2.960  130.0   15.2   108   12.6 
2026-06-11 00:00 UT   13 41 27.4   -14 49 43     2.214    2.961  129.0   15.5   108   12.6 
2026-06-12 00:00 UT   13 41 12.7   -14 53 12     2.225    2.961  128.0   15.7   108   12.6 
2026-06-13 00:00 UT   13 40 59.4   -14 56 45     2.236    2.961  127.0   15.9   108   12.6 
2026-06-14 00:00 UT   13 40 47.6   -15 00 22     2.247    2.961  126.1   16.1   108   12.6 
2026-06-15 00:00 UT   13 40 37.2   -15 04 03     2.259    2.962  125.1   16.3   108   12.7 
2026-06-16 00:00 UT   13 40 28.3   -15 07 49     2.270    2.962  124.1   16.5   108   12.7 
2026-06-17 00:00 UT   13 40 20.9   -15 11 38     2.282    2.962  123.2   16.7   108   12.7 
2026-06-18 00:00 UT   13 40 14.8   -15 15 32     2.293    2.962  122.2   16.9   108   12.7 
2026-06-19 00:00 UT   13 40 10.2   -15 19 30     2.305    2.963  121.3   17.0   108   12.7 
2026-06-20 00:00 UT   13 40 07.1   -15 23 32     2.317    2.963  120.3   17.2   108   12.7 
2026-06-21 00:00 UT   13 40 05.3   -15 27 39     2.329    2.963  119.4   17.4   109   12.8 
2026-06-22 00:00 UT   13 40 05.0   -15 31 49     2.341    2.964  118.5   17.5   109   12.8 

    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.