2021 DM
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 Nov 2025	28.1	1.723 AU	0.881 AU	04h40m	+51°46'	133.7°	24.6°

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
2025-11-01 00:00 UT   04 40 53.2   +51 46 12     0.881    1.723  133.7   24.6   229   28.1 
2025-11-01 02:31 UT   04 40 45.6   +51 47 45     0.880    1.723  133.8   24.6   229   28.1 
2025-11-02 00:00 UT   04 39 37.5   +52 00 59     0.873    1.720  134.4   24.3   227   28.1 
2025-11-03 00:00 UT   04 38 16.3   +52 15 31     0.865    1.717  135.1   24.1   226   28.1 
2025-11-04 00:00 UT   04 36 49.5   +52 29 47     0.857    1.714  135.8   23.8   224   28.1 
2025-11-05 00:00 UT   04 35 17.1   +52 43 44     0.850    1.711  136.5   23.5   222   28.0 
2025-11-06 00:00 UT   04 33 39.0   +52 57 22     0.842    1.708  137.1   23.3   221   28.0 
2025-11-07 00:00 UT   04 31 55.2   +53 10 38     0.835    1.705  137.8   23.0   219   28.0 
2025-11-08 00:00 UT   04 30 05.7   +53 23 31     0.828    1.701  138.4   22.7   217   27.9 
2025-11-09 00:00 UT   04 28 10.5   +53 35 58     0.821    1.698  139.0   22.5   215   27.9 
2025-11-10 00:00 UT   04 26 09.6   +53 47 57     0.814    1.695  139.6   22.2   213   27.9 
2025-11-11 00:00 UT   04 24 03.1   +53 59 27     0.808    1.692  140.2   22.0   211   27.8 
2025-11-12 00:00 UT   04 21 51.0   +54 10 26     0.801    1.688  140.8   21.8   208   27.8 
2025-11-13 00:00 UT   04 19 33.3   +54 20 51     0.795    1.685  141.3   21.6   206   27.8 
2025-11-14 00:00 UT   04 17 10.4   +54 30 40     0.789    1.681  141.8   21.3   204   27.8 
2025-11-15 00:00 UT   04 14 42.2   +54 39 51     0.783    1.678  142.3   21.1   201   27.7 
2025-11-16 00:00 UT   04 12 09.0   +54 48 22     0.777    1.675  142.7   21.0   199   27.7 
2025-11-17 00:00 UT   04 09 31.0   +54 56 11     0.771    1.671  143.1   20.8   196   27.7 
2025-11-18 00:00 UT   04 06 48.4   +55 03 16     0.766    1.668  143.5   20.6   194   27.7 
2025-11-19 00:00 UT   04 04 01.5   +55 09 35     0.761    1.664  143.9   20.5   191   27.6 
2025-11-20 00:00 UT   04 01 10.7   +55 15 07     0.756    1.661  144.2   20.4   188   27.6 
2025-11-21 00:00 UT   03 58 16.2   +55 19 49     0.751    1.657  144.4   20.3   185   27.6 
2025-11-22 00:00 UT   03 55 18.5   +55 23 41     0.746    1.654  144.6   20.2   182   27.6 
2025-11-23 00:00 UT   03 52 17.8   +55 26 41     0.742    1.650  144.8   20.2   179   27.5 
2025-11-24 00:00 UT   03 49 14.7   +55 28 47     0.737    1.646  145.0   20.1   176   27.5 

    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.