(313) Chaldaea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Jan 2026	14.6	2.614 AU	3.428 AU	18h18m	-14°31'	29.3°	10.6°
Opposition	24 Jul 2026	13.1	2.794 AU	1.800 AU	20h03m	-05°08'	165.0°	5.4°

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 Chaldaea are:

            e (Eccentricity)                : 0.1808338
            a (Semimajor axis)              : 2.3756468
            i (Inclination)                 : 11.64375
            Ω (Longitude of ascending node) : 176.53270
            ω (Argument of perihelion)      : 315.73423
            M (Mean anomaly)                : 98.13748
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 132.86222
            B (Latitude of perihelion)      : -8.09830
            P (Orbital period in years)     : 3.66            
        

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
2026-01-23 00:00 UT   18 18 45.0   -14 31 03     3.428    2.614   29.3   10.6   284   14.6 
2026-01-23 08:53 UT   18 19 23.3   -14 30 19     3.426    2.615   29.5   10.7   284   14.6 
2026-01-24 00:00 UT   18 20 28.3   -14 29 02     3.423    2.616   29.9   10.8   284   14.6 
2026-01-25 00:00 UT   18 22 11.3   -14 26 57     3.418    2.617   30.4   11.0   283   14.6 
2026-01-26 00:00 UT   18 23 53.9   -14 24 46     3.413    2.619   31.0   11.2   283   14.6 
2026-01-27 00:00 UT   18 25 36.2   -14 22 30     3.408    2.620   31.6   11.3   282   14.6 
2026-01-28 00:00 UT   18 27 18.2   -14 20 09     3.403    2.622   32.1   11.5   282   14.6 
2026-01-29 00:00 UT   18 28 59.8   -14 17 43     3.397    2.623   32.7   11.7   281   14.6 
2026-01-30 00:00 UT   18 30 41.0   -14 15 12     3.392    2.625   33.3   11.9   281   14.6 
2026-01-31 00:00 UT   18 32 22.0   -14 12 37     3.386    2.626   33.9   12.1   280   14.7 
2026-02-01 00:00 UT   18 34 02.5   -14 09 56     3.380    2.628   34.5   12.3   280   14.7 
2026-02-02 00:00 UT   18 35 42.7   -14 07 10     3.374    2.629   35.1   12.4   280   14.7 
2026-02-03 00:00 UT   18 37 22.5   -14 04 19     3.368    2.631   35.6   12.6   279   14.7 
2026-02-04 00:00 UT   18 39 01.9   -14 01 24     3.362    2.632   36.2   12.8   279   14.7 
2026-02-05 00:00 UT   18 40 41.0   -13 58 24     3.356    2.633   36.8   13.0   278   14.7 
2026-02-06 00:00 UT   18 42 19.7   -13 55 19     3.349    2.635   37.4   13.1   278   14.7 
2026-02-07 00:00 UT   18 43 58.0   -13 52 10     3.343    2.636   38.0   13.3   277   14.7 
2026-02-08 00:00 UT   18 45 35.9   -13 48 56     3.336    2.638   38.6   13.5   277   14.7 
2026-02-09 00:00 UT   18 47 13.3   -13 45 37     3.329    2.639   39.2   13.7   277   14.7 
2026-02-10 00:00 UT   18 48 50.4   -13 42 13     3.322    2.641   39.8   13.8   276   14.7 
2026-02-11 00:00 UT   18 50 27.1   -13 38 46     3.315    2.642   40.4   14.0   276   14.7 
2026-02-12 00:00 UT   18 52 03.3   -13 35 13     3.308    2.644   41.0   14.2   276   14.7 

    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.