(313) Chaldaea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Apr 2024	13.9	2.197 AU	3.154 AU	03h18m	+11°01'	15.0°	6.8°
Opposition	16 Mar 2025	10.9	2.034 AU	1.039 AU	11h48m	+01°09'	178.9°	0.5°

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)                : 0.1812367
            a (Semimajor axis)              : 2.3762348
            i (Inclination)                 : 11.64546
            Ω (Longitude of ascending node) : 176.56163
            ω (Argument of perihelion)      : 315.61360
            M (Mean anomaly)                : 296.72977
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 132.77078
            B (Latitude of perihelion)      : -8.11708
            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
2024-04-27 00:00 UT   03 18 36.3   +11 01 21     3.154    2.197   15.0    6.8   102   13.9 
2024-04-27 01:50 UT   03 18 45.5   +11 01 53     3.154    2.197   15.0    6.8   102   13.9 
2024-04-28 00:00 UT   03 20 37.7   +11 08 28     3.155    2.195   14.6    6.6   103   13.9 
2024-04-29 00:00 UT   03 22 39.5   +11 15 31     3.156    2.193   14.2    6.5   104   13.9 
2024-04-30 00:00 UT   03 24 41.5   +11 22 30     3.156    2.191   13.8    6.3   106   13.9 
2024-05-01 00:00 UT   03 26 44.0   +11 29 25     3.157    2.189   13.4    6.1   107   13.9 
2024-05-02 00:00 UT   03 28 46.7   +11 36 15     3.157    2.187   13.1    6.0   108   13.9 
2024-05-03 00:00 UT   03 30 49.8   +11 43 01     3.158    2.185   12.7    5.8   109   13.9 
2024-05-04 00:00 UT   03 32 53.2   +11 49 42     3.158    2.183   12.3    5.7   111   13.9 
2024-05-05 00:00 UT   03 34 56.9   +11 56 18     3.158    2.181   12.0    5.5   112   13.8 
2024-05-06 00:00 UT   03 37 00.9   +12 02 50     3.158    2.180   11.6    5.4   114   13.8 
2024-05-07 00:00 UT   03 39 05.3   +12 09 16     3.158    2.178   11.3    5.2   116   13.8 
2024-05-08 00:00 UT   03 41 10.0   +12 15 38     3.158    2.176   11.0    5.1   117   13.8 
2024-05-09 00:00 UT   03 43 14.9   +12 21 55     3.158    2.174   10.6    4.9   119   13.8 
2024-05-10 00:00 UT   03 45 20.2   +12 28 07     3.158    2.172   10.3    4.8   121   13.8 
2024-05-11 00:00 UT   03 47 25.8   +12 34 13     3.157    2.170   10.0    4.6   123   13.8 
2024-05-12 00:00 UT   03 49 31.7   +12 40 15     3.157    2.168    9.7    4.5   125   13.8 
2024-05-13 00:00 UT   03 51 37.9   +12 46 11     3.156    2.166    9.5    4.4   127   13.8 

    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.