2016 HM3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Oct 2025	31.2	3.200 AU	2.887 AU	06h54m	+24°24'	99.1°	17.9°

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)                : 0.5345241
            a (Semimajor axis)              : 2.3138680
            i (Inclination)                 : 2.14826
            Ω (Longitude of ascending node) : 43.57669
            ω (Argument of perihelion)      : 195.69450
            M (Mean anomaly)                : 199.95910
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 59.26070
            B (Latitude of perihelion)      : -0.58100
            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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-15 00:00 UT   06 54 35.2   +24 24 50     2.887    3.200   99.1   17.9   275   31.2 
2025-10-15 11:40 UT   06 54 46.6   +24 24 56     2.878    3.199   99.6   17.9   275   31.2 
2025-10-16 00:00 UT   06 54 58.4   +24 25 03     2.869    3.197  100.0   17.9   275   31.2 
2025-10-17 00:00 UT   06 55 20.3   +24 25 19     2.851    3.194  100.9   17.8   275   31.2 
2025-10-18 00:00 UT   06 55 41.0   +24 25 36     2.834    3.191  101.8   17.8   275   31.2 
2025-10-19 00:00 UT   06 56 00.4   +24 25 56     2.816    3.188  102.8   17.7   275   31.2 
2025-10-20 00:00 UT   06 56 18.6   +24 26 17     2.798    3.185  103.7   17.7   275   31.2 
2025-10-21 00:00 UT   06 56 35.5   +24 26 40     2.781    3.181  104.6   17.6   275   31.1 
2025-10-22 00:00 UT   06 56 51.0   +24 27 06     2.763    3.178  105.6   17.6   275   31.1 
2025-10-23 00:00 UT   06 57 05.3   +24 27 33     2.746    3.175  106.5   17.5   275   31.1 
2025-10-24 00:00 UT   06 57 18.1   +24 28 03     2.728    3.172  107.5   17.4   275   31.1 
2025-10-25 00:00 UT   06 57 29.6   +24 28 35     2.711    3.169  108.4   17.3   275   31.1 
2025-10-26 00:00 UT   06 57 39.7   +24 29 09     2.694    3.166  109.4   17.2   275   31.0 
2025-10-27 00:00 UT   06 57 48.4   +24 29 45     2.677    3.162  110.3   17.1   275   31.0 
2025-10-28 00:00 UT   06 57 55.7   +24 30 24     2.660    3.159  111.3   17.0   275   31.0 
2025-10-29 00:00 UT   06 58 01.5   +24 31 05     2.643    3.156  112.3   16.9   275   31.0 
2025-10-30 00:00 UT   06 58 05.8   +24 31 49     2.626    3.153  113.3   16.8   275   31.0 
2025-10-31 00:00 UT   06 58 08.7   +24 32 34     2.609    3.149  114.2   16.7   275   30.9 
2025-11-01 00:00 UT   06 58 10.1   +24 33 23     2.592    3.146  115.2   16.6   275   30.9 
2025-11-02 00:00 UT   06 58 09.9   +24 34 13     2.575    3.143  116.2   16.5   275   30.9 
2025-11-03 00:00 UT   06 58 08.3   +24 35 06     2.559    3.140  117.3   16.3   275   30.9 
2025-11-04 00:00 UT   06 58 05.1   +24 36 02     2.542    3.136  118.3   16.2   275   30.9 
2025-11-05 00:00 UT   06 58 00.3   +24 36 60     2.526    3.133  119.3   16.0   275   30.8 
2025-11-06 00:00 UT   06 57 53.9   +24 38 00     2.510    3.130  120.3   15.9   275   30.8 
2025-11-07 00:00 UT   06 57 46.0   +24 39 03     2.494    3.126  121.3   15.7   275   30.8 
2025-11-08 00:00 UT   06 57 36.4   +24 40 08     2.478    3.123  122.4   15.5   274   30.8 
2025-11-09 00:00 UT   06 57 25.2   +24 41 16     2.462    3.119  123.4   15.4   274   30.8 
2025-11-10 00:00 UT   06 57 12.3   +24 42 26     2.446    3.116  124.5   15.2   274   30.7 
2025-11-11 00:00 UT   06 56 57.8   +24 43 38     2.431    3.113  125.5   15.0   274   30.7 
2025-11-12 00:00 UT   06 56 41.6   +24 44 52     2.415    3.109  126.6   14.8   274   30.7 
2025-11-13 00:00 UT   06 56 23.8   +24 46 09     2.400    3.106  127.7   14.6   274   30.7 
2025-11-14 00:00 UT   06 56 04.2   +24 47 29     2.385    3.102  128.8   14.4   274   30.6 

    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.