(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	6 May 2026	11.8	2.953 AU	1.957 AU	14h04m	-13°20'	168.5°	3.9°

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
2026-05-06 00:00 UT   14 04 53.1   -13 20 21     1.957    2.953  168.5    3.9   107   11.8 
2026-05-06 11:52 UT   14 04 24.9   -13 21 16     1.959    2.953  168.0    4.1   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 
2026-05-14 00:00 UT   13 57 36.8   -13 35 47     1.988    2.954  159.2    7.0   106   12.0 
2026-05-15 00:00 UT   13 56 45.8   -13 37 48     1.993    2.954  158.0    7.3   106   12.0 
2026-05-16 00:00 UT   13 55 55.8   -13 39 52     1.998    2.955  156.9    7.7   106   12.1 
2026-05-17 00:00 UT   13 55 06.8   -13 41 57     2.004    2.955  155.8    8.1   106   12.1 
2026-05-18 00:00 UT   13 54 18.9   -13 44 04     2.009    2.955  154.6    8.4   106   12.1 
2026-05-19 00:00 UT   13 53 32.0   -13 46 14     2.015    2.955  153.5    8.8   106   12.1 
2026-05-20 00:00 UT   13 52 46.2   -13 48 26     2.022    2.955  152.4    9.1   107   12.1 
2026-05-21 00:00 UT   13 52 01.6   -13 50 40     2.028    2.956  151.2    9.5   107   12.2 
2026-05-22 00:00 UT   13 51 18.1   -13 52 57     2.035    2.956  150.1    9.8   107   12.2 
2026-05-23 00:00 UT   13 50 35.9   -13 55 16     2.042    2.956  149.0   10.2   107   12.2 
2026-05-24 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 38     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 

    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.