(21) Lutetia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Jan 2026	12.7	2.536 AU	2.711 AU	15h46m	-17°53'	69.3°	21.3°
Opposition	29 May 2026	10.0	2.317 AU	1.304 AU	16h29m	-20°38'	178.3°	0.7°

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 Lutetia are:

            e (Eccentricity)                : 0.1647833
            a (Semimajor axis)              : 2.4340237
            i (Inclination)                 : 3.06457
            Ω (Longitude of ascending node) : 80.83714
            ω (Argument of perihelion)      : 249.93981
            M (Mean anomaly)                : 246.81007
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 150.75052
            B (Latitude of perihelion)      : -2.87849
            P (Orbital period in years)     : 3.80            
        

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
2026-01-28 00:00 UT   15 46 43.4   -17 53 03     2.711    2.536   69.3   21.3   283   12.7 
2026-01-28 19:04 UT   15 47 52.0   -17 56 41     2.700    2.534   69.8   21.4   283   12.7 
2026-01-29 00:00 UT   15 48 09.7   -17 57 36     2.697    2.534   69.9   21.4   283   12.7 
2026-01-30 00:00 UT   15 49 35.5   -18 02 05     2.683    2.532   70.6   21.5   283   12.7 
2026-01-31 00:00 UT   15 51 00.9   -18 06 29     2.669    2.531   71.3   21.6   283   12.7 
2026-02-01 00:00 UT   15 52 25.8   -18 10 50     2.655    2.529   71.9   21.7   283   12.7 
2026-02-02 00:00 UT   15 53 50.3   -18 15 06     2.640    2.527   72.6   21.8   283   12.7 
2026-02-03 00:00 UT   15 55 14.2   -18 19 17     2.626    2.525   73.3   21.9   282   12.6 
2026-02-04 00:00 UT   15 56 37.7   -18 23 25     2.612    2.524   73.9   22.0   282   12.6 
2026-02-05 00:00 UT   15 58 00.7   -18 27 28     2.597    2.522   74.6   22.1   282   12.6 
2026-02-06 00:00 UT   15 59 23.2   -18 31 28     2.583    2.520   75.3   22.2   282   12.6 
2026-02-07 00:00 UT   16 00 45.2   -18 35 23     2.569    2.519   76.0   22.3   282   12.6 
2026-02-08 00:00 UT   16 02 06.6   -18 39 14     2.554    2.517   76.7   22.4   282   12.6 
2026-02-09 00:00 UT   16 03 27.4   -18 43 00     2.540    2.515   77.4   22.5   282   12.6 
2026-02-10 00:00 UT   16 04 47.7   -18 46 43     2.525    2.513   78.0   22.6   281   12.6 
2026-02-11 00:00 UT   16 06 07.4   -18 50 22     2.511    2.512   78.7   22.7   281   12.6 
2026-02-12 00:00 UT   16 07 26.4   -18 53 56     2.496    2.510   79.4   22.7   281   12.5 
2026-02-13 00:00 UT   16 08 44.9   -18 57 26     2.481    2.508   80.1   22.8   281   12.5 
2026-02-14 00:00 UT   16 10 02.6   -19 00 52     2.467    2.507   80.8   22.9   281   12.5 
2026-02-15 00:00 UT   16 11 19.8   -19 04 14     2.452    2.505   81.5   23.0   281   12.5 
2026-02-16 00:00 UT   16 12 36.2   -19 07 32     2.437    2.503   82.2   23.0   281   12.5 
2026-02-17 00:00 UT   16 13 52.0   -19 10 46     2.423    2.501   82.9   23.1   280   12.5 
2026-02-18 00:00 UT   16 15 07.0   -19 13 57     2.408    2.500   83.6   23.1   280   12.5 
2026-02-19 00:00 UT   16 16 21.4   -19 17 03     2.393    2.498   84.4   23.2   280   12.5 
2026-02-20 00:00 UT   16 17 34.9   -19 20 05     2.378    2.496   85.1   23.2   280   12.4 
2026-02-21 00:00 UT   16 18 47.7   -19 23 03     2.364    2.494   85.8   23.3   280   12.4 
2026-02-22 00:00 UT   16 19 59.8   -19 25 57     2.349    2.493   86.5   23.3   280   12.4 
2026-02-23 00:00 UT   16 21 11.0   -19 28 48     2.334    2.491   87.2   23.4   280   12.4 

    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.