2021 DM
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Dec 2025	27.4	1.561 AU	0.689 AU	02h46m	+52°30'	137.0°	25.5°

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 2021 DM are:

            e (Eccentricity)                : 0.3279107
            a (Semimajor axis)              : 1.4289542
            i (Inclination)                 : 14.68788
            Ω (Longitude of ascending node) : 334.66756
            ω (Argument of perihelion)      : 222.89507
            M (Mean anomaly)                : 257.25183
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 16.61472
            B (Latitude of perihelion)      : -9.93804
            P (Orbital period in years)     : 1.71            
        

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
2025-12-16 00:00 UT   02 46 38.5   +52 30 39     0.689    1.561  137.0   25.5   116   27.4 
2025-12-16 14:24 UT   02 45 23.7   +52 20 47     0.689    1.558  136.5   25.7   115   27.4 
2025-12-17 00:00 UT   02 44 35.0   +52 14 07     0.689    1.557  136.2   25.9   114   27.4 
2025-12-18 00:00 UT   02 42 37.7   +51 57 07     0.689    1.553  135.5   26.4   112   27.4 
2025-12-19 00:00 UT   02 40 46.7   +51 39 42     0.689    1.548  134.7   26.9   111   27.4 
2025-12-20 00:00 UT   02 39 02.0   +51 21 54     0.689    1.544  133.9   27.3   109   27.5 
2025-12-21 00:00 UT   02 37 23.7   +51 03 46     0.690    1.540  133.1   27.8   107   27.5 
2025-12-22 00:00 UT   02 35 51.7   +50 45 20     0.690    1.536  132.3   28.3   105   27.5 
2025-12-23 00:00 UT   02 34 26.2   +50 26 38     0.691    1.531  131.5   28.8   104   27.5 
2025-12-24 00:00 UT   02 33 07.1   +50 07 43     0.692    1.527  130.6   29.3   102   27.5 
2025-12-25 00:00 UT   02 31 54.4   +49 48 37     0.692    1.523  129.8   29.8   101   27.5 
2025-12-26 00:00 UT   02 30 48.0   +49 29 23     0.693    1.518  128.9   30.3    99   27.5 
2025-12-27 00:00 UT   02 29 47.9   +49 10 01     0.694    1.514  128.1   30.8    98   27.5 
2025-12-28 00:00 UT   02 28 54.0   +48 50 35     0.696    1.510  127.2   31.2    97   27.5 
2025-12-29 00:00 UT   02 28 06.3   +48 31 06     0.697    1.505  126.4   31.7    95   27.6 
2025-12-30 00:00 UT   02 27 24.5   +48 11 35     0.698    1.501  125.5   32.2    94   27.6 
2025-12-31 00:00 UT   02 26 48.7   +47 52 05     0.700    1.496  124.6   32.7    93   27.6 
2026-01-01 00:00 UT   02 26 18.7   +47 32 37     0.701    1.492  123.8   33.2    92   27.6 
2026-01-02 00:00 UT   02 25 54.4   +47 13 11     0.703    1.487  122.9   33.7    91   27.6 
2026-01-03 00:00 UT   02 25 35.7   +46 53 51     0.705    1.483  122.1   34.2    90   27.6 
2026-01-04 00:00 UT   02 25 22.5   +46 34 36     0.706    1.478  121.2   34.7    89   27.6 
2026-01-05 00:00 UT   02 25 14.6   +46 15 28     0.708    1.474  120.3   35.2    88   27.6 
2026-01-06 00:00 UT   02 25 12.0   +45 56 28     0.710    1.469  119.5   35.6    87   27.7 
2026-01-07 00:00 UT   02 25 14.5   +45 37 36     0.712    1.465  118.6   36.1    86   27.7 
2026-01-08 00:00 UT   02 25 22.1   +45 18 54     0.714    1.460  117.8   36.6    86   27.7 
2026-01-09 00:00 UT   02 25 34.6   +45 00 22     0.716    1.455  116.9   37.0    85   27.7 

    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.