2021 SM3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Feb 2026	27.0	1.898 AU	2.132 AU	17h38m	-31°33'	62.9°	27.6°

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 SM3 are:

            e (Eccentricity)                : 0.4801960
            a (Semimajor axis)              : 1.5059573
            i (Inclination)                 : 16.06139
            Ω (Longitude of ascending node) : 23.08474
            ω (Argument of perihelion)      : 71.20389
            M (Mean anomaly)                : 52.81330
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 93.58176
            B (Latitude of perihelion)      : 15.18359
            P (Orbital period in years)     : 1.85            
        

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
2026-02-17 00:00 UT   17 38 26.3   -31 33 39     2.132    1.898   62.9   27.6   268   27.0 
2026-02-17 17:58 UT   17 39 48.3   -31 39 03     2.127    1.902   63.4   27.7   268   27.0 
2026-02-18 00:00 UT   17 40 15.8   -31 40 52     2.125    1.903   63.5   27.7   268   27.0 
2026-02-19 00:00 UT   17 42 04.5   -31 48 03     2.118    1.907   64.1   27.8   268   27.0 
2026-02-20 00:00 UT   17 43 52.5   -31 55 12     2.111    1.912   64.8   27.9   268   27.0 
2026-02-21 00:00 UT   17 45 39.6   -32 02 19     2.104    1.916   65.4   28.0   267   27.0 
2026-02-22 00:00 UT   17 47 25.8   -32 09 24     2.097    1.920   66.0   28.1   267   27.0 
2026-02-23 00:00 UT   17 49 11.3   -32 16 28     2.089    1.925   66.6   28.2   267   27.0 
2026-02-24 00:00 UT   17 50 55.9   -32 23 31     2.082    1.929   67.3   28.2   267   27.0 
2026-02-25 00:00 UT   17 52 39.6   -32 30 32     2.074    1.933   67.9   28.3   267   27.0 
2026-02-26 00:00 UT   17 54 22.4   -32 37 33     2.067    1.937   68.5   28.4   267   27.0 
2026-02-27 00:00 UT   17 56 04.4   -32 44 33     2.059    1.942   69.2   28.5   267   27.0 
2026-02-28 00:00 UT   17 57 45.4   -32 51 32     2.051    1.946   69.8   28.5   267   27.0 
2026-03-01 00:00 UT   17 59 25.5   -32 58 31     2.043    1.950   70.5   28.6   267   27.0 
2026-03-02 00:00 UT   18 01 04.7   -33 05 29     2.035    1.954   71.1   28.7   267   27.0 
2026-03-03 00:00 UT   18 02 43.0   -33 12 28     2.027    1.958   71.8   28.7   266   27.0 
2026-03-04 00:00 UT   18 04 20.2   -33 19 26     2.019    1.962   72.4   28.8   266   27.0 
2026-03-05 00:00 UT   18 05 56.6   -33 26 25     2.011    1.966   73.1   28.9   266   27.0 
2026-03-06 00:00 UT   18 07 31.9   -33 33 25     2.002    1.970   73.7   28.9   266   27.0 
2026-03-07 00:00 UT   18 09 06.2   -33 40 25     1.994    1.974   74.4   29.0   266   27.0 
2026-03-08 00:00 UT   18 10 39.5   -33 47 26     1.986    1.978   75.1   29.0   266   27.0 
2026-03-09 00:00 UT   18 12 11.7   -33 54 28     1.977    1.982   75.7   29.0   266   27.0 
2026-03-10 00:00 UT   18 13 42.9   -34 01 31     1.968    1.985   76.4   29.1   266   27.0 
2026-03-11 00:00 UT   18 15 12.9   -34 08 36     1.960    1.989   77.1   29.1   266   27.0 
2026-03-12 00:00 UT   18 16 41.9   -34 15 42     1.951    1.993   77.8   29.2   266   27.0 

    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.