(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Oct 2026	13.6	3.014 AU	3.795 AU	15h35m	-28°48'	33.4°	10.5°
Opposition	23 Jul 2027	12.6	3.203 AU	2.284 AU	20h52m	-48°57'	149.9°	9.1°

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)                 : 21.02090
            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
2026-10-20 00:00 UT   15 35 52.7   -28 48 37     3.795    3.014   33.4   10.5   118   13.6 
2026-10-20 07:34 UT   15 36 22.8   -28 50 47     3.797    3.014   33.2   10.4   118   13.6 
2026-10-21 00:00 UT   15 37 28.5   -28 55 31     3.802    3.014   32.8   10.3   118   13.6 
2026-10-22 00:00 UT   15 39 04.7   -29 02 23     3.809    3.015   32.3   10.1   118   13.6 
2026-10-23 00:00 UT   15 40 41.3   -29 09 13     3.817    3.015   31.7   10.0   119   13.6 
2026-10-24 00:00 UT   15 42 18.3   -29 16 02     3.824    3.016   31.1    9.8   119   13.6 
2026-10-25 00:00 UT   15 43 55.7   -29 22 48     3.831    3.016   30.5    9.6   119   13.6 
2026-10-26 00:00 UT   15 45 33.5   -29 29 32     3.838    3.017   29.9    9.5   120   13.6 
2026-10-27 00:00 UT   15 47 11.6   -29 36 14     3.844    3.018   29.4    9.3   120   13.6 
2026-10-28 00:00 UT   15 48 50.1   -29 42 54     3.851    3.018   28.8    9.1   120   13.6 
2026-10-29 00:00 UT   15 50 29.0   -29 49 32     3.857    3.019   28.2    9.0   121   13.6 
2026-10-30 00:00 UT   15 52 08.3   -29 56 08     3.864    3.019   27.6    8.8   121   13.6 
2026-10-31 00:00 UT   15 53 48.0   -30 02 41     3.870    3.020   27.1    8.6   121   13.6 
2026-11-01 00:00 UT   15 55 28.0   -30 09 12     3.876    3.020   26.5    8.4   122   13.6 
2026-11-02 00:00 UT   15 57 08.4   -30 15 41     3.882    3.021   25.9    8.3   122   13.6 
2026-11-03 00:00 UT   15 58 49.2   -30 22 07     3.888    3.021   25.4    8.1   123   13.6 
2026-11-04 00:00 UT   16 00 30.3   -30 28 31     3.893    3.022   24.8    7.9   123   13.6 
2026-11-05 00:00 UT   16 02 11.7   -30 34 53     3.899    3.023   24.3    7.8   124   13.5 
2026-11-06 00:00 UT   16 03 53.5   -30 41 12     3.904    3.023   23.7    7.6   124   13.5 
2026-11-07 00:00 UT   16 05 35.7   -30 47 28     3.910    3.024   23.2    7.4   125   13.5 
2026-11-08 00:00 UT   16 07 18.2   -30 53 42     3.915    3.024   22.6    7.2   125   13.5 
2026-11-09 00:00 UT   16 09 01.0   -30 59 54     3.920    3.025   22.1    7.1   126   13.5 
2026-11-10 00:00 UT   16 10 44.2   -31 06 02     3.925    3.025   21.6    6.9   127   13.5 
2026-11-11 00:00 UT   16 12 27.7   -31 12 08     3.929    3.026   21.0    6.7   128   13.5 

    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.