(2016) Heinemann
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Dec 2025	18.3	3.397 AU	4.208 AU	15h48m	-20°26'	30.5°	8.5°
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) : 16.98873
            ω (Argument of perihelion)      : 339.97733
            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
2025-12-22 00:00 UT   15 48 48.8   -20 26 53     4.208    3.397   30.5    8.5   282   18.3 
2025-12-22 13:16 UT   15 49 33.8   -20 29 17     4.202    3.396   30.9    8.6   282   18.3 
2025-12-23 00:00 UT   15 50 10.2   -20 31 13     4.198    3.395   31.2    8.6   282   18.3 
2025-12-24 00:00 UT   15 51 31.6   -20 35 30     4.189    3.394   31.9    8.8   282   18.3 
2025-12-25 00:00 UT   15 52 52.8   -20 39 44     4.179    3.392   32.6    9.0   281   18.3 
2025-12-26 00:00 UT   15 54 13.9   -20 43 55     4.170    3.391   33.3    9.2   281   18.3 
2025-12-27 00:00 UT   15 55 34.9   -20 48 04     4.160    3.389   34.0    9.3   281   18.3 
2025-12-28 00:00 UT   15 56 55.8   -20 52 10     4.150    3.388   34.7    9.5   281   18.3 
2025-12-29 00:00 UT   15 58 16.5   -20 56 12     4.140    3.386   35.4    9.7   281   18.3 
2025-12-30 00:00 UT   15 59 37.1   -21 00 13     4.129    3.385   36.1    9.9   281   18.3 
2025-12-31 00:00 UT   16 00 57.6   -21 04 10     4.119    3.383   36.8   10.0   281   18.3 
2026-01-01 00:00 UT   16 02 17.9   -21 08 04     4.109    3.382   37.5   10.2   281   18.3 
2026-01-02 00:00 UT   16 03 38.1   -21 11 56     4.098    3.380   38.2   10.4   281   18.3 
2026-01-03 00:00 UT   16 04 58.1   -21 15 45     4.087    3.378   38.9   10.5   280   18.3 
2026-01-04 00:00 UT   16 06 17.9   -21 19 31     4.076    3.377   39.6   10.7   280   18.3 
2026-01-05 00:00 UT   16 07 37.5   -21 23 14     4.065    3.375   40.3   10.9   280   18.3 
2026-01-06 00:00 UT   16 08 57.0   -21 26 54     4.054    3.374   41.0   11.0   280   18.3 
2026-01-07 00:00 UT   16 10 16.3   -21 30 31     4.042    3.372   41.7   11.2   280   18.3 
2026-01-08 00:00 UT   16 11 35.4   -21 34 06     4.031    3.371   42.4   11.3   280   18.3 
2026-01-09 00:00 UT   16 12 54.3   -21 37 37     4.019    3.369   43.1   11.5   280   18.3 
2026-01-10 00:00 UT   16 14 13.0   -21 41 06     4.007    3.368   43.8   11.7   280   18.3 
2026-01-11 00:00 UT   16 15 31.4   -21 44 32     3.996    3.366   44.5   11.8   280   18.3 
2026-01-12 00:00 UT   16 16 49.6   -21 47 55     3.984    3.364   45.2   12.0   279   18.3 
2026-01-13 00:00 UT   16 18 07.6   -21 51 15     3.971    3.363   46.0   12.1   279   18.3 
2026-01-14 00:00 UT   16 19 25.4   -21 54 32     3.959    3.361   46.7   12.3   279   18.3 
2026-01-15 00:00 UT   16 20 42.9   -21 57 47     3.947    3.360   47.4   12.4   279   18.3 
2026-01-16 00:00 UT   16 22 00.1   -22 00 58     3.934    3.358   48.1   12.6   279   18.3 
2026-01-17 00:00 UT   16 23 17.0   -22 04 07     3.922    3.356   48.8   12.7   279   18.3 
2026-01-18 00:00 UT   16 24 33.7   -22 07 12     3.909    3.355   49.5   12.9   279   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.