2016 HM3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Dec 2025	30.1	3.027 AU	2.115 AU	06h42m	+25°21'	153.0°	8.5°

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 2016 HM3 are:

            e (Eccentricity)                : 0.5334343
            a (Semimajor axis)              : 2.3152242
            i (Inclination)                 : 2.14348
            Ω (Longitude of ascending node) : 43.49266
            ω (Argument of perihelion)      : 195.76197
            M (Mean anomaly)                : 255.88175
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 59.24415
            B (Latitude of perihelion)      : -0.58213
            P (Orbital period in years)     : 3.52            
        

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
2025-12-05 00:00 UT   06 42 38.2   +25 21 12     2.115    3.027  153.0    8.5   270   30.1 
2025-12-05 16:02 UT   06 42 00.5   +25 22 21     2.109    3.024  153.8    8.3   270   30.1 
2025-12-06 00:00 UT   06 41 41.5   +25 22 56     2.105    3.023  154.2    8.1   269   30.1 
2025-12-07 00:00 UT   06 40 43.3   +25 24 39     2.095    3.019  155.5    7.8   269   30.0 
2025-12-08 00:00 UT   06 39 43.6   +25 26 22     2.085    3.015  156.7    7.4   269   30.0 
2025-12-09 00:00 UT   06 38 42.5   +25 28 04     2.076    3.012  157.9    7.1   268   30.0 
2025-12-10 00:00 UT   06 37 40.0   +25 29 44     2.067    3.008  159.2    6.7   268   30.0 
2025-12-11 00:00 UT   06 36 36.1   +25 31 24     2.058    3.004  160.4    6.3   267   29.9 
2025-12-12 00:00 UT   06 35 31.0   +25 33 02     2.049    3.000  161.7    5.9   266   29.9 
2025-12-13 00:00 UT   06 34 24.5   +25 34 38     2.041    2.996  162.9    5.5   266   29.9 
2025-12-14 00:00 UT   06 33 16.8   +25 36 13     2.033    2.992  164.2    5.1   265   29.8 
2025-12-15 00:00 UT   06 32 08.0   +25 37 45     2.025    2.988  165.5    4.7   264   29.8 
2025-12-16 00:00 UT   06 30 58.0   +25 39 16     2.018    2.984  166.7    4.3   263   29.8 
2025-12-17 00:00 UT   06 29 47.0   +25 40 44     2.011    2.981  168.0    3.9   262   29.7 
2025-12-18 00:00 UT   06 28 35.0   +25 42 10     2.004    2.977  169.2    3.5   260   29.7 
2025-12-19 00:00 UT   06 27 22.1   +25 43 33     1.998    2.973  170.5    3.1   258   29.7 
2025-12-20 00:00 UT   06 26 08.3   +25 44 53     1.992    2.969  171.7    2.7   255   29.6 
2025-12-21 00:00 UT   06 24 53.7   +25 46 10     1.986    2.965  173.0    2.3   252   29.6 
2025-12-22 00:00 UT   06 23 38.5   +25 47 24     1.980    2.961  174.2    1.9   247   29.6 
2025-12-23 00:00 UT   06 22 22.5   +25 48 35     1.975    2.957  175.3    1.6   241   29.5 
2025-12-24 00:00 UT   06 21 06.0   +25 49 43     1.970    2.953  176.3    1.2   229   29.5 
2025-12-25 00:00 UT   06 19 49.0   +25 50 47     1.966    2.948  177.2    0.9   211   29.4 
2025-12-26 00:00 UT   06 18 31.6   +25 51 47     1.962    2.944  177.5    0.8   184   29.4 
2025-12-27 00:00 UT   06 17 13.9   +25 52 44     1.958    2.940  177.2    0.9   155   29.4 
2025-12-28 00:00 UT   06 15 55.9   +25 53 37     1.954    2.936  176.4    1.2   136   29.4 
2025-12-29 00:00 UT   06 14 37.7   +25 54 26     1.951    2.932  175.4    1.5   125   29.5 
2025-12-30 00:00 UT   06 13 19.5   +25 55 11     1.948    2.928  174.2    1.9   117   29.5 
2025-12-31 00:00 UT   06 12 01.2   +25 55 52     1.945    2.924  173.0    2.3   112   29.5 
2026-01-01 00:00 UT   06 10 42.9   +25 56 30     1.943    2.920  171.8    2.8   109   29.5 
2026-01-02 00:00 UT   06 09 24.8   +25 57 03     1.941    2.915  170.5    3.2   106   29.6 
2026-01-03 00:00 UT   06 08 06.9   +25 57 32     1.939    2.911  169.3    3.6   104   29.6 
2026-01-04 00:00 UT   06 06 49.3   +25 57 58     1.938    2.907  168.0    4.0   103   29.6 

    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.