2016 HM3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	29.8	2.988 AU	2.025 AU	06h32m	+25°37'	165.5°	4.7°

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
2025-12-15 00:00 UT   06 32 08.0   +25 37 45     2.025    2.988  165.5    4.7   264   29.8 
2025-12-15 07:52 UT   06 31 45.2   +25 38 15     2.023    2.987  165.9    4.6   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 
2026-01-05 00:00 UT   06 05 32.1   +25 58 19     1.937    2.903  166.7    4.5   101   29.6 
2026-01-06 00:00 UT   06 04 15.3   +25 58 36     1.936    2.899  165.4    4.9   100   29.6 
2026-01-07 00:00 UT   06 02 59.0   +25 58 50     1.936    2.894  164.1    5.3    99   29.7 
2026-01-08 00:00 UT   06 01 43.3   +25 58 59     1.936    2.890  162.9    5.8    98   29.7 
2026-01-09 00:00 UT   06 00 28.3   +25 59 05     1.936    2.886  161.6    6.2    98   29.7 
2026-01-10 00:00 UT   05 59 14.0   +25 59 07     1.937    2.881  160.3    6.6    97   29.7 
2026-01-11 00:00 UT   05 58 00.5   +25 59 06     1.937    2.877  159.0    7.0    96   29.7 
2026-01-12 00:00 UT   05 56 48.0   +25 59 00     1.938    2.873  157.7    7.5    96   29.7 
2026-01-13 00:00 UT   05 55 36.3   +25 58 52     1.940    2.869  156.4    7.9    95   29.8 
2026-01-14 00:00 UT   05 54 25.7   +25 58 40     1.942    2.864  155.2    8.3    95   29.8 

    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.