(135) Hertha
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Apr 2026	11.9	2.447 AU	1.542 AU	15h15m	-21°14'	147.5°	12.7°
Opposition	6 May 2026	11.1	2.386 AU	1.378 AU	14h53m	-20°16'	176.2°	1.6°

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 Hertha are:

            e (Eccentricity)                : 0.2083719
            a (Semimajor axis)              : 2.4268992
            i (Inclination)                 : 2.30329
            Ω (Longitude of ascending node) : 343.43461
            ω (Argument of perihelion)      : 340.31245
            M (Mean anomaly)                : 243.17605
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 323.76174
            B (Latitude of perihelion)      : -0.77577
            P (Orbital period in years)     : 3.78            
        

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
2026-04-10 00:00 UT   15 15 43.3   -21 14 38     1.542    2.447  147.5   12.7   290   11.9 
2026-04-10 10:22 UT   15 15 28.9   -21 14 23     1.538    2.446  147.9   12.6   290   11.9 
2026-04-11 00:00 UT   15 15 09.5   -21 14 01     1.533    2.445  148.6   12.3   290   11.9 
2026-04-12 00:00 UT   15 14 33.9   -21 13 15     1.524    2.442  149.7   12.0   291   11.9 
2026-04-13 00:00 UT   15 13 56.7   -21 12 23     1.515    2.440  150.8   11.6   291   11.8 
2026-04-14 00:00 UT   15 13 17.9   -21 11 22     1.507    2.438  151.9   11.2   291   11.8 
2026-04-15 00:00 UT   15 12 37.4   -21 10 14     1.498    2.435  153.0   10.8   292   11.8 
2026-04-16 00:00 UT   15 11 55.3   -21 08 58     1.490    2.433  154.2   10.3   292   11.8 
2026-04-17 00:00 UT   15 11 11.7   -21 07 34     1.482    2.431  155.3    9.9   293   11.7 
2026-04-18 00:00 UT   15 10 26.5   -21 06 02     1.475    2.428  156.5    9.5   293   11.7 
2026-04-19 00:00 UT   15 09 39.9   -21 04 23     1.467    2.426  157.6    9.1   294   11.7 
2026-04-20 00:00 UT   15 08 51.9   -21 02 36     1.460    2.424  158.7    8.6   294   11.6 
2026-04-21 00:00 UT   15 08 02.6   -21 00 41     1.453    2.422  159.9    8.2   295   11.6 
2026-04-22 00:00 UT   15 07 11.9   -20 58 39     1.447    2.419  161.1    7.8   296   11.6 
2026-04-23 00:00 UT   15 06 20.0   -20 56 29     1.440    2.417  162.2    7.3   296   11.5 
2026-04-24 00:00 UT   15 05 26.9   -20 54 12     1.434    2.415  163.4    6.8   297   11.5 
2026-04-25 00:00 UT   15 04 32.7   -20 51 48     1.428    2.412  164.5    6.4   298   11.5 
2026-04-26 00:00 UT   15 03 37.5   -20 49 17     1.422    2.410  165.7    5.9   300   11.4 
2026-04-27 00:00 UT   15 02 41.2   -20 46 38     1.417    2.408  166.8    5.5   301   11.4 
2026-04-28 00:00 UT   15 01 44.0   -20 43 53     1.412    2.405  168.0    5.0   303   11.4 
2026-04-29 00:00 UT   15 00 46.0   -20 41 00     1.407    2.403  169.1    4.5   305   11.3 
2026-04-30 00:00 UT   14 59 47.2   -20 38 02     1.402    2.401  170.3    4.1   307   11.3 
2026-05-01 00:00 UT   14 58 47.6   -20 34 56     1.398    2.398  171.4    3.6   310   11.3 
2026-05-02 00:00 UT   14 57 47.5   -20 31 45     1.394    2.396  172.4    3.2   314   11.2 
2026-05-03 00:00 UT   14 56 46.7   -20 28 27     1.390    2.394  173.5    2.7   319   11.2 
2026-05-04 00:00 UT   14 55 45.4   -20 25 03     1.386    2.391  174.5    2.3   326   11.2 
2026-05-05 00:00 UT   14 54 43.7   -20 21 34     1.383    2.389  175.3    2.0   336   11.1 
2026-05-06 00:00 UT   14 53 41.7   -20 17 60     1.380    2.387  176.0    1.7   349   11.1 
2026-05-07 00:00 UT   14 52 39.4   -20 14 20     1.377    2.384  176.4    1.5     7   11.1 
2026-05-08 00:00 UT   14 51 36.9   -20 10 36     1.374    2.382  176.4    1.5    27   11.1 
2026-05-09 00:00 UT   14 50 34.3   -20 06 46     1.372    2.380  176.0    1.7    44   11.1 
2026-05-10 00:00 UT   14 49 31.7   -20 02 53     1.370    2.377  175.3    2.0    57   11.1 

    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.