(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Jan 2026	13.3	2.949 AU	2.895 AU	14h28m	-07°06'	83.4°	19.4°
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)      : 167.95948
            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
2026-01-21 00:00 UT   14 28 48.5   -07 06 00     2.895    2.949   83.4   19.4   289   13.3 
2026-01-21 15:48 UT   14 29 19.9   -07 10 06     2.886    2.949   84.0   19.4   289   13.3 
2026-01-22 00:00 UT   14 29 36.1   -07 12 12     2.881    2.949   84.2   19.4   289   13.3 
2026-01-23 00:00 UT   14 30 23.0   -07 18 21     2.867    2.949   85.0   19.4   289   13.3 
2026-01-24 00:00 UT   14 31 08.9   -07 24 25     2.852    2.949   85.8   19.4   289   13.3 
2026-01-25 00:00 UT   14 31 54.0   -07 30 26     2.838    2.949   86.6   19.5   289   13.2 
2026-01-26 00:00 UT   14 32 38.2   -07 36 24     2.824    2.949   87.4   19.5   289   13.2 
2026-01-27 00:00 UT   14 33 21.5   -07 42 18     2.810    2.949   88.2   19.5   289   13.2 
2026-01-28 00:00 UT   14 34 03.8   -07 48 08     2.796    2.949   89.1   19.5   288   13.2 
2026-01-29 00:00 UT   14 34 45.3   -07 53 55     2.781    2.949   89.9   19.5   288   13.2 
2026-01-30 00:00 UT   14 35 25.7   -07 59 38     2.767    2.948   90.7   19.5   288   13.2 
2026-01-31 00:00 UT   14 36 05.3   -08 05 18     2.753    2.948   91.5   19.5   288   13.2 
2026-02-01 00:00 UT   14 36 43.8   -08 10 55     2.739    2.948   92.3   19.5   288   13.2 
2026-02-02 00:00 UT   14 37 21.3   -08 16 28     2.725    2.948   93.2   19.5   288   13.2 
2026-02-03 00:00 UT   14 37 57.8   -08 21 57     2.711    2.948   94.0   19.5   288   13.1 
2026-02-04 00:00 UT   14 38 33.3   -08 27 24     2.696    2.948   94.8   19.5   287   13.1 
2026-02-05 00:00 UT   14 39 07.8   -08 32 46     2.682    2.948   95.7   19.4   287   13.1 
2026-02-06 00:00 UT   14 39 41.1   -08 38 05     2.668    2.948   96.5   19.4   287   13.1 
2026-02-07 00:00 UT   14 40 13.4   -08 43 21     2.654    2.948   97.4   19.4   287   13.1 
2026-02-08 00:00 UT   14 40 44.6   -08 48 34     2.640    2.948   98.3   19.3   287   13.1 
2026-02-09 00:00 UT   14 41 14.7   -08 53 43     2.626    2.948   99.1   19.3   287   13.1 
2026-02-10 00:00 UT   14 41 43.7   -08 58 48     2.612    2.948  100.0   19.2   287   13.1 
2026-02-11 00:00 UT   14 42 11.4   -09 03 50     2.598    2.948  100.9   19.2   286   13.0 
2026-02-12 00:00 UT   14 42 38.0   -09 08 49     2.584    2.948  101.7   19.1   286   13.0 
2026-02-13 00:00 UT   14 43 03.5   -09 13 44     2.570    2.948  102.6   19.1   286   13.0 
2026-02-14 00:00 UT   14 43 27.7   -09 18 36     2.556    2.948  103.5   19.0   286   13.0 
2026-02-15 00:00 UT   14 43 50.6   -09 23 25     2.542    2.948  104.4   18.9   286   13.0 
2026-02-16 00:00 UT   14 44 12.4   -09 28 10     2.529    2.947  105.3   18.9   286   13.0 
2026-02-17 00:00 UT   14 44 32.9   -09 32 52     2.515    2.947  106.2   18.8   286   13.0 
2026-02-18 00:00 UT   14 44 52.0   -09 37 30     2.501    2.947  107.1   18.7   286   12.9 
2026-02-19 00:00 UT   14 45 09.9   -09 42 06     2.488    2.947  108.0   18.6   286   12.9 
2026-02-20 00:00 UT   14 45 26.5   -09 46 38     2.474    2.947  108.9   18.5   285   12.9 

    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.