(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	22 Jun 2026	12.8	2.964 AU	2.341 AU	13h40m	-15°31'	118.5°	17.5°

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 Bertha are:

            e (Eccentricity)                : 0.0771710
            a (Semimajor axis)              : 3.1936962
            i (Inclination)                 : 21.02089
            Ω (Longitude of ascending node) : 36.47777
            ω (Argument of perihelion)      : 168.02073
            M (Mean anomaly)                : 17.11742
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 25.27487
            B (Latitude of perihelion)      : 4.26978
            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
2026-06-22 00:00 UT   13 40 05.4   -15 31 53     2.341    2.964  118.5   17.5   109   12.8 
2026-06-22 02:23 UT   13 40 05.4   -15 32 19     2.343    2.964  118.4   17.6   109   12.8 
2026-06-23 00:00 UT   13 40 06.5   -15 36 08     2.354    2.964  117.5   17.7   109   12.8 
2026-06-24 00:00 UT   13 40 08.9   -15 40 27     2.366    2.964  116.6   17.9   109   12.8 
2026-06-25 00:00 UT   13 40 12.7   -15 44 50     2.378    2.964  115.7   18.0   109   12.8 
2026-06-26 00:00 UT   13 40 17.9   -15 49 18     2.391    2.965  114.8   18.1   109   12.8 
2026-06-27 00:00 UT   13 40 24.4   -15 53 49     2.404    2.965  113.9   18.3   109   12.9 
2026-06-28 00:00 UT   13 40 32.3   -15 58 24     2.416    2.965  113.0   18.4   109   12.9 
2026-06-29 00:00 UT   13 40 41.5   -16 03 04     2.429    2.966  112.1   18.5   109   12.9 
2026-06-30 00:00 UT   13 40 52.0   -16 07 47     2.442    2.966  111.2   18.6   109   12.9 
2026-07-01 00:00 UT   13 41 03.8   -16 12 35     2.455    2.966  110.4   18.7   109   12.9 
2026-07-02 00:00 UT   13 41 16.9   -16 17 26     2.468    2.966  109.5   18.8   109   12.9 
2026-07-03 00:00 UT   13 41 31.3   -16 22 21     2.481    2.967  108.6   18.9   109   13.0 
2026-07-04 00:00 UT   13 41 47.0   -16 27 21     2.495    2.967  107.8   19.0   109   13.0 
2026-07-05 00:00 UT   13 42 03.8   -16 32 24     2.508    2.967  106.9   19.1   109   13.0 
2026-07-06 00:00 UT   13 42 22.0   -16 37 30     2.521    2.968  106.0   19.2   110   13.0 
2026-07-07 00:00 UT   13 42 41.4   -16 42 41     2.535    2.968  105.2   19.3   110   13.0 
2026-07-08 00:00 UT   13 43 01.9   -16 47 55     2.548    2.968  104.4   19.4   110   13.0 
2026-07-09 00:00 UT   13 43 23.7   -16 53 14     2.562    2.969  103.5   19.4   110   13.0 
2026-07-10 00:00 UT   13 43 46.7   -16 58 36     2.575    2.969  102.7   19.5   110   13.1 
2026-07-11 00:00 UT   13 44 10.9   -17 04 01     2.589    2.969  101.9   19.6   110   13.1 
2026-07-12 00:00 UT   13 44 36.2   -17 09 30     2.602    2.970  101.0   19.6   110   13.1 
2026-07-13 00:00 UT   13 45 02.8   -17 15 03     2.616    2.970  100.2   19.7   110   13.1 
2026-07-14 00:00 UT   13 45 30.4   -17 20 40     2.630    2.970   99.4   19.7   110   13.1 
2026-07-15 00:00 UT   13 45 59.2   -17 26 20     2.644    2.971   98.6   19.8   110   13.1 
2026-07-16 00:00 UT   13 46 29.2   -17 32 03     2.657    2.971   97.8   19.8   110   13.1 
2026-07-17 00:00 UT   13 47 00.2   -17 37 50     2.671    2.971   97.0   19.8   110   13.1 
2026-07-18 00:00 UT   13 47 32.3   -17 43 40     2.685    2.972   96.2   19.9   110   13.2 
2026-07-19 00:00 UT   13 48 05.6   -17 49 34     2.699    2.972   95.4   19.9   110   13.2 
2026-07-20 00:00 UT   13 48 39.9   -17 55 31     2.713    2.972   94.6   19.9   110   13.2 
2026-07-21 00:00 UT   13 49 15.2   -18 01 31     2.727    2.973   93.8   19.9   110   13.2 
2026-07-22 00:00 UT   13 49 51.6   -18 07 35     2.740    2.973   93.1   20.0   110   13.2 

    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.