(313) Chaldaea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 Jun 2026	13.5	2.781 AU	1.879 AU	20h24m	-03°47'	146.1°	11.8°
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)                : 0.1808179
            a (Semimajor axis)              : 2.3758951
            i (Inclination)                 : 11.64392
            Ω (Longitude of ascending node) : 176.52511
            ω (Argument of perihelion)      : 315.78289
            M (Mean anomaly)                : 151.91629
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 132.90327
            B (Latitude of perihelion)      : -8.09132
            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
2026-06-29 00:00 UT   20 24 57.4   -03 47 14     1.879    2.781  146.1   11.8   232   13.5 
2026-06-29 23:18 UT   20 24 17.5   -03 48 20     1.873    2.782  147.1   11.5   231   13.5 
2026-06-30 00:00 UT   20 24 16.3   -03 48 22     1.873    2.782  147.1   11.4   231   13.5 
2026-07-01 00:00 UT   20 23 34.0   -03 49 40     1.867    2.783  148.1   11.1   230   13.4 
2026-07-02 00:00 UT   20 22 50.7   -03 51 08     1.862    2.783  149.1   10.8   229   13.4 
2026-07-03 00:00 UT   20 22 06.3   -03 52 47     1.856    2.784  150.0   10.5   228   13.4 
2026-07-04 00:00 UT   20 21 20.9   -03 54 37     1.851    2.784  151.0   10.2   227   13.4 
2026-07-05 00:00 UT   20 20 34.5   -03 56 37     1.846    2.785  152.0    9.9   226   13.4 
2026-07-06 00:00 UT   20 19 47.2   -03 58 47     1.841    2.785  152.9    9.6   224   13.3 
2026-07-07 00:00 UT   20 18 59.0   -04 01 08     1.837    2.786  153.9    9.3   223   13.3 
2026-07-08 00:00 UT   20 18 09.9   -04 03 39     1.833    2.786  154.8    8.9   221   13.3 
2026-07-09 00:00 UT   20 17 20.0   -04 06 21     1.829    2.787  155.7    8.6   220   13.3 
2026-07-10 00:00 UT   20 16 29.4   -04 09 12     1.825    2.787  156.6    8.3   218   13.3 
2026-07-11 00:00 UT   20 15 38.0   -04 12 14     1.821    2.788  157.5    8.0   216   13.3 
2026-07-12 00:00 UT   20 14 45.9   -04 15 27     1.818    2.788  158.3    7.7   214   13.2 
2026-07-13 00:00 UT   20 13 53.2   -04 18 49     1.815    2.789  159.2    7.5   211   13.2 
2026-07-14 00:00 UT   20 12 60.0   -04 22 21     1.812    2.789  159.9    7.2   209   13.2 
2026-07-15 00:00 UT   20 12 06.3   -04 26 03     1.810    2.790  160.7    6.9   206   13.2 
2026-07-16 00:00 UT   20 11 12.1   -04 29 55     1.808    2.790  161.4    6.7   203   13.2 
2026-07-17 00:00 UT   20 10 17.5   -04 33 56     1.806    2.791  162.1    6.4   200   13.2 
2026-07-18 00:00 UT   20 09 22.5   -04 38 06     1.804    2.791  162.7    6.2   197   13.2 
2026-07-19 00:00 UT   20 08 27.3   -04 42 25     1.803    2.791  163.3    6.0   193   13.2 
2026-07-20 00:00 UT   20 07 31.9   -04 46 53     1.802    2.792  163.8    5.8   190   13.1 
2026-07-21 00:00 UT   20 06 36.3   -04 51 30     1.801    2.792  164.2    5.7   186   13.1 
2026-07-22 00:00 UT   20 05 40.6   -04 56 15     1.800    2.793  164.5    5.6   181   13.1 
2026-07-23 00:00 UT   20 04 44.9   -05 01 08     1.800    2.793  164.8    5.5   177   13.1 
2026-07-24 00:00 UT   20 03 49.2   -05 06 09     1.800    2.794  165.0    5.4   173   13.1 
2026-07-25 00:00 UT   20 02 53.5   -05 11 17     1.800    2.794  165.1    5.4   168   13.1 
2026-07-26 00:00 UT   20 01 58.0   -05 16 33     1.801    2.794  165.1    5.4   163   13.1 
2026-07-27 00:00 UT   20 01 02.7   -05 21 56     1.802    2.795  165.0    5.4   159   13.1 
2026-07-28 00:00 UT   20 00 07.6   -05 27 26     1.803    2.795  164.8    5.5   154   13.1 
2026-07-29 00:00 UT   19 59 12.8   -05 33 03     1.804    2.795  164.5    5.6   150   13.1 

    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.