(154) Bertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Aug 2026	13.5	2.985 AU	3.151 AU	14h15m	-21°28'	71.3°	18.7°
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
2026-08-21 00:00 UT   14 15 09.7   -21 28 56     3.151    2.985   71.3   18.7   112   13.5 
2026-08-21 04:58 UT   14 15 22.7   -21 30 26     3.154    2.985   71.2   18.7   112   13.5 
2026-08-22 00:00 UT   14 16 12.9   -21 36 09     3.164    2.985   70.6   18.6   112   13.5 
2026-08-23 00:00 UT   14 17 16.7   -21 43 23     3.177    2.986   69.9   18.6   112   13.5 
2026-08-24 00:00 UT   14 18 21.3   -21 50 39     3.191    2.986   69.3   18.5   112   13.5 
2026-08-25 00:00 UT   14 19 26.6   -21 57 56     3.204    2.987   68.6   18.4   112   13.5 
2026-08-26 00:00 UT   14 20 32.6   -22 05 13     3.216    2.987   67.9   18.3   112   13.5 
2026-08-27 00:00 UT   14 21 39.2   -22 12 32     3.229    2.987   67.2   18.2   112   13.5 
2026-08-28 00:00 UT   14 22 46.6   -22 19 52     3.242    2.988   66.6   18.1   112   13.5 
2026-08-29 00:00 UT   14 23 54.5   -22 27 13     3.255    2.988   65.9   18.0   112   13.5 
2026-08-30 00:00 UT   14 25 03.2   -22 34 34     3.267    2.989   65.2   17.9   112   13.5 
2026-08-31 00:00 UT   14 26 12.5   -22 41 57     3.280    2.989   64.6   17.8   113   13.5 
2026-09-01 00:00 UT   14 27 22.4   -22 49 20     3.293    2.990   63.9   17.7   113   13.5 
2026-09-02 00:00 UT   14 28 33.0   -22 56 44     3.305    2.990   63.3   17.5   113   13.5 
2026-09-03 00:00 UT   14 29 44.2   -23 04 09     3.317    2.991   62.6   17.4   113   13.5 
2026-09-04 00:00 UT   14 30 56.1   -23 11 34     3.330    2.991   61.9   17.3   113   13.5 
2026-09-05 00:00 UT   14 32 08.5   -23 18 60     3.342    2.991   61.3   17.2   113   13.5 
2026-09-06 00:00 UT   14 33 21.6   -23 26 26     3.354    2.992   60.6   17.1   113   13.6 
2026-09-07 00:00 UT   14 34 35.4   -23 33 53     3.366    2.992   60.0   17.0   113   13.6 
2026-09-08 00:00 UT   14 35 49.7   -23 41 21     3.378    2.993   59.3   16.8   113   13.6 
2026-09-09 00:00 UT   14 37 04.6   -23 48 48     3.390    2.993   58.7   16.7   113   13.6 
2026-09-10 00:00 UT   14 38 20.2   -23 56 16     3.402    2.994   58.1   16.6   113   13.6 
2026-09-11 00:00 UT   14 39 36.3   -24 03 45     3.414    2.994   57.4   16.5   113   13.6 
2026-09-12 00:00 UT   14 40 53.0   -24 11 13     3.425    2.995   56.8   16.3   113   13.6 
2026-09-13 00:00 UT   14 42 10.3   -24 18 42     3.437    2.995   56.1   16.2   113   13.6 
2026-09-14 00:00 UT   14 43 28.2   -24 26 11     3.449    2.996   55.5   16.1   113   13.6 
2026-09-15 00:00 UT   14 44 46.7   -24 33 40     3.460    2.996   54.9   15.9   113   13.6 
2026-09-16 00:00 UT   14 46 05.7   -24 41 08     3.471    2.997   54.2   15.8   114   13.6 
2026-09-17 00:00 UT   14 47 25.3   -24 48 37     3.482    2.997   53.6   15.7   114   13.6 
2026-09-18 00:00 UT   14 48 45.4   -24 56 05     3.494    2.997   53.0   15.5   114   13.6 

    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.