(313) Chaldaea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	16 Mar 2025	10.9	2.034 AU	1.039 AU	11h48m	+01°10'	178.9°	0.5°
Today	26 Mar 2025	11.3	2.048 AU	1.059 AU	11h41m	+03°21'	169.1°	5.3°

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)                : 0.1808084
            a (Semimajor axis)              : 2.3753201
            i (Inclination)                 : 11.64441
            Ω (Longitude of ascending node) : 176.53710
            ω (Argument of perihelion)      : 315.68822
            M (Mean anomaly)                : 44.34067
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 132.82071
            B (Latitude of perihelion)      : -8.10547
            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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-03-26 00:00 UT   11 41 32.9   +03 21 20     1.059    2.048  169.1    5.3   120   11.3 
2025-03-26 10:37 UT   11 41 15.2   +03 27 10     1.061    2.048  168.6    5.5   120   11.3 
2025-03-27 00:00 UT   11 40 53.2   +03 34 27     1.063    2.049  167.9    5.9   120   11.4 
2025-03-28 00:00 UT   11 40 14.4   +03 47 23     1.067    2.051  166.7    6.4   120   11.4 
2025-03-29 00:00 UT   11 39 36.6   +04 00 08     1.070    2.052  165.4    7.0   120   11.4 
2025-03-30 00:00 UT   11 38 59.7   +04 12 40     1.075    2.054  164.2    7.6   120   11.5 
2025-03-31 00:00 UT   11 38 23.9   +04 24 59     1.079    2.055  163.0    8.2   120   11.5 
2025-04-01 00:00 UT   11 37 49.3   +04 37 05     1.084    2.057  161.8    8.7   120   11.5 
2025-04-02 00:00 UT   11 37 15.8   +04 48 56     1.089    2.058  160.6    9.3   119   11.6 
2025-04-03 00:00 UT   11 36 43.7   +05 00 33     1.094    2.060  159.4    9.8   119   11.6 
2025-04-04 00:00 UT   11 36 12.8   +05 11 54     1.099    2.062  158.2   10.4   119   11.6 
2025-04-05 00:00 UT   11 35 43.3   +05 22 59     1.105    2.063  157.1   10.9   119   11.7 
2025-04-06 00:00 UT   11 35 15.2   +05 33 48     1.111    2.065  155.9   11.4   119   11.7 
2025-04-07 00:00 UT   11 34 48.6   +05 44 21     1.117    2.066  154.7   11.9   119   11.7 
2025-04-08 00:00 UT   11 34 23.5   +05 54 36     1.123    2.068  153.6   12.4   119   11.8 
2025-04-09 00:00 UT   11 33 59.8   +06 04 34     1.129    2.070  152.4   12.9   119   11.8 
2025-04-10 00:00 UT   11 33 37.8   +06 14 14     1.136    2.071  151.3   13.4   119   11.8 
2025-04-11 00:00 UT   11 33 17.3   +06 23 36     1.143    2.073  150.2   13.9   119   11.9 
2025-04-12 00:00 UT   11 32 58.4   +06 32 40     1.150    2.075  149.1   14.4   119   11.9 
2025-04-13 00:00 UT   11 32 41.1   +06 41 26     1.157    2.076  148.0   14.8   119   11.9 
2025-04-14 00:00 UT   11 32 25.5   +06 49 53     1.164    2.078  146.9   15.3   119   12.0 
2025-04-15 00:00 UT   11 32 11.5   +06 58 02     1.172    2.080  145.8   15.7   119   12.0 
2025-04-16 00:00 UT   11 31 59.3   +07 05 52     1.180    2.081  144.7   16.2   119   12.0 
2025-04-17 00:00 UT   11 31 48.7   +07 13 24     1.188    2.083  143.6   16.6   119   12.1 
2025-04-18 00:00 UT   11 31 39.8   +07 20 37     1.196    2.085  142.6   17.0   118   12.1 
2025-04-19 00:00 UT   11 31 32.6   +07 27 31     1.204    2.086  141.5   17.4   118   12.1 
2025-04-20 00:00 UT   11 31 27.1   +07 34 06     1.213    2.088  140.5   17.8   118   12.1 
2025-04-21 00:00 UT   11 31 23.4   +07 40 23     1.222    2.090  139.4   18.2   118   12.2 
2025-04-22 00:00 UT   11 31 21.3   +07 46 21     1.230    2.091  138.4   18.6   118   12.2 
2025-04-23 00:00 UT   11 31 21.0   +07 51 60     1.239    2.093  137.4   19.0   118   12.2 
2025-04-24 00:00 UT   11 31 22.4   +07 57 21     1.249    2.095  136.4   19.3   118   12.3 
2025-04-25 00:00 UT   11 31 25.6   +08 02 23     1.258    2.097  135.4   19.7   118   12.3 

    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.