(2016) Heinemann
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Nov 2025	18.2	3.437 AU	4.396 AU	15h11m	-18°13'	12.1°	3.4°
Opposition	9 Jun 2026	16.1	3.105 AU	2.090 AU	17h09m	-24°08'	178.8°	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 Heinemann are:

            e (Eccentricity)                : 0.1901159
            a (Semimajor axis)              : 3.1313175
            i (Inclination)                 : 0.91755
            Ω (Longitude of ascending node) : 16.98878
            ω (Argument of perihelion)      : 339.97728
            M (Mean anomaly)                : 247.72948
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -3.03158
            B (Latitude of perihelion)      : -0.31415
            P (Orbital period in years)     : 5.54            
        

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
2025-11-25 00:00 UT   15 11 57.6   -18 13 42     4.396    3.437   12.1    3.4   284   18.2 
2025-11-25 16:13 UT   15 12 52.8   -18 17 23     4.393    3.436   12.5    3.6   284   18.2 
2025-11-26 00:00 UT   15 13 19.3   -18 19 09     4.391    3.436   12.8    3.6   284   18.2 
2025-11-27 00:00 UT   15 14 41.0   -18 24 34     4.386    3.434   13.4    3.8   284   18.2 
2025-11-28 00:00 UT   15 16 02.8   -18 29 57     4.381    3.433   14.1    4.0   284   18.2 
2025-11-29 00:00 UT   15 17 24.7   -18 35 17     4.376    3.431   14.8    4.2   284   18.2 
2025-11-30 00:00 UT   15 18 46.6   -18 40 35     4.370    3.430   15.5    4.4   284   18.2 
2025-12-01 00:00 UT   15 20 08.5   -18 45 51     4.365    3.428   16.1    4.6   284   18.3 
2025-12-02 00:00 UT   15 21 30.4   -18 51 04     4.359    3.427   16.8    4.8   283   18.3 
2025-12-03 00:00 UT   15 22 52.4   -18 56 15     4.353    3.425   17.5    5.0   283   18.3 
2025-12-04 00:00 UT   15 24 14.4   -19 01 24     4.347    3.424   18.2    5.2   283   18.3 
2025-12-05 00:00 UT   15 25 36.4   -19 06 30     4.340    3.422   18.9    5.3   283   18.3 
2025-12-06 00:00 UT   15 26 58.5   -19 11 34     4.334    3.421   19.5    5.5   283   18.3 
2025-12-07 00:00 UT   15 28 20.5   -19 16 36     4.327    3.420   20.2    5.7   283   18.3 
2025-12-08 00:00 UT   15 29 42.6   -19 21 35     4.320    3.418   20.9    5.9   283   18.3 
2025-12-09 00:00 UT   15 31 04.6   -19 26 31     4.313    3.417   21.6    6.1   283   18.3 
2025-12-10 00:00 UT   15 32 26.7   -19 31 25     4.306    3.415   22.3    6.3   283   18.3 
2025-12-11 00:00 UT   15 33 48.7   -19 36 17     4.299    3.414   23.0    6.5   283   18.3 
2025-12-12 00:00 UT   15 35 10.7   -19 41 06     4.291    3.412   23.6    6.6   283   18.3 
2025-12-13 00:00 UT   15 36 32.7   -19 45 53     4.284    3.411   24.3    6.8   283   18.3 
2025-12-14 00:00 UT   15 37 54.7   -19 50 37     4.276    3.409   25.0    7.0   282   18.3 
2025-12-15 00:00 UT   15 39 16.7   -19 55 18     4.268    3.408   25.7    7.2   282   18.3 
2025-12-16 00:00 UT   15 40 38.6   -19 59 57     4.260    3.406   26.4    7.4   282   18.3 
2025-12-17 00:00 UT   15 42 00.4   -20 04 33     4.251    3.405   27.1    7.6   282   18.3 
2025-12-18 00:00 UT   15 43 22.3   -20 09 06     4.243    3.403   27.8    7.7   282   18.3 
2025-12-19 00:00 UT   15 44 44.0   -20 13 37     4.234    3.402   28.4    7.9   282   18.3 
2025-12-20 00:00 UT   15 46 05.7   -20 18 05     4.226    3.400   29.1    8.1   282   18.3 

    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.