(2016) Heinemann
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 May 2026	16.7	3.140 AU	2.176 AU	17h24m	-24°19'	158.6°	6.8°
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) : 16.98872
            ω (Argument of perihelion)      : 339.97734
            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
2026-05-22 00:00 UT   17 24 48.9   -24 19 20     2.176    3.140  158.6    6.8   276   16.7 
2026-05-22 21:18 UT   17 24 11.1   -24 19 05     2.169    3.138  159.6    6.5   277   16.6 
2026-05-23 00:00 UT   17 24 06.3   -24 19 03     2.169    3.138  159.7    6.4   277   16.6 
2026-05-24 00:00 UT   17 23 22.6   -24 18 43     2.162    3.136  160.8    6.1   277   16.6 
2026-05-25 00:00 UT   17 22 38.1   -24 18 22     2.155    3.134  161.9    5.8   277   16.6 
2026-05-26 00:00 UT   17 21 52.8   -24 17 58     2.149    3.132  163.1    5.4   278   16.6 
2026-05-27 00:00 UT   17 21 06.6   -24 17 33     2.143    3.130  164.2    5.1   278   16.5 
2026-05-28 00:00 UT   17 20 19.7   -24 17 06     2.138    3.128  165.3    4.7   278   16.5 
2026-05-29 00:00 UT   17 19 32.1   -24 16 36     2.132    3.127  166.5    4.4   279   16.5 
2026-05-30 00:00 UT   17 18 43.8   -24 16 04     2.127    3.125  167.6    4.0   279   16.5 
2026-05-31 00:00 UT   17 17 54.8   -24 15 31     2.122    3.123  168.7    3.6   280   16.4 
2026-06-01 00:00 UT   17 17 05.3   -24 14 55     2.118    3.121  169.9    3.3   281   16.4 
2026-06-02 00:00 UT   17 16 15.2   -24 14 17     2.114    3.119  171.0    2.9   282   16.4 
2026-06-03 00:00 UT   17 15 24.6   -24 13 37     2.110    3.117  172.2    2.5   283   16.3 
2026-06-04 00:00 UT   17 14 33.6   -24 12 56     2.106    3.115  173.3    2.2   285   16.3 
2026-06-05 00:00 UT   17 13 42.2   -24 12 12     2.102    3.114  174.4    1.8   287   16.3 
2026-06-06 00:00 UT   17 12 50.4   -24 11 26     2.099    3.112  175.5    1.5   290   16.2 
2026-06-07 00:00 UT   17 11 58.4   -24 10 38     2.096    3.110  176.6    1.1   296   16.2 
2026-06-08 00:00 UT   17 11 06.1   -24 09 48     2.094    3.108  177.7    0.8   306   16.2 
2026-06-09 00:00 UT   17 10 13.6   -24 08 56     2.091    3.106  178.5    0.5   330   16.1 
2026-06-10 00:00 UT   17 09 21.0   -24 08 02     2.089    3.104  178.8    0.4    20   16.1 
2026-06-11 00:00 UT   17 08 28.3   -24 07 07     2.088    3.102  178.1    0.6    56   16.2 
2026-06-12 00:00 UT   17 07 35.6   -24 06 10     2.086    3.101  177.1    1.0    71   16.2 
2026-06-13 00:00 UT   17 06 42.9   -24 05 11     2.085    3.099  176.0    1.3    78   16.2 
2026-06-14 00:00 UT   17 05 50.3   -24 04 11     2.084    3.097  174.9    1.7    82   16.2 
2026-06-15 00:00 UT   17 04 57.8   -24 03 09     2.083    3.095  173.8    2.0    84   16.3 
2026-06-16 00:00 UT   17 04 05.6   -24 02 05     2.083    3.093  172.6    2.4    86   16.3 
2026-06-17 00:00 UT   17 03 13.6   -24 01 01     2.083    3.091  171.5    2.8    87   16.3 
2026-06-18 00:00 UT   17 02 21.9   -23 59 55     2.083    3.089  170.3    3.2    88   16.3 
2026-06-19 00:00 UT   17 01 30.6   -23 58 48     2.084    3.088  169.2    3.5    89   16.4 
2026-06-20 00:00 UT   17 00 39.8   -23 57 40     2.084    3.086  168.1    3.9    90   16.4 
2026-06-21 00:00 UT   16 59 49.4   -23 56 30     2.085    3.084  166.9    4.3    91   16.4 

    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.