(404) Arsinoe
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	23 Mar 2024	11.9	2.117 AU	1.176 AU	12h56m	+22°18'	154.0°	11.9°
Today	25 Apr 2024	12.2	2.088 AU	1.238 AU	12h31m	+22°32'	136.8°	19.3°

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 Arsinoe are:

            e (Eccentricity)                : 0.2013745
            a (Semimajor axis)              : 2.5922636
            i (Inclination)                 : 14.09772
            Ω (Longitude of ascending node) : 92.47143
            ω (Argument of perihelion)      : 120.60850
            M (Mean anomaly)                : 342.10342
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 33.85336
            B (Latitude of perihelion)      : 12.10114
            P (Orbital period in years)     : 4.17            
        

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
2024-04-25 00:00 UT   12 31 06.1   +22 32 02     1.238    2.088  136.8   19.3   143   12.2 
2024-04-25 11:00 UT   12 30 51.3   +22 29 18     1.240    2.088  136.4   19.4   143   12.2 
2024-04-26 00:00 UT   12 30 34.3   +22 25 58     1.243    2.087  136.0   19.6   142   12.2 
2024-04-27 00:00 UT   12 30 04.1   +22 19 33     1.248    2.087  135.2   19.9   141   12.2 
2024-04-28 00:00 UT   12 29 35.6   +22 12 48     1.254    2.086  134.4   20.2   140   12.2 
2024-04-29 00:00 UT   12 29 08.7   +22 05 43     1.259    2.085  133.6   20.5   139   12.3 
2024-04-30 00:00 UT   12 28 43.5   +21 58 18     1.265    2.085  132.8   20.8   138   12.3 
2024-05-01 00:00 UT   12 28 20.1   +21 50 34     1.271    2.084  132.0   21.0   138   12.3 
2024-05-02 00:00 UT   12 27 58.4   +21 42 31     1.276    2.083  131.2   21.3   137   12.3 
2024-05-03 00:00 UT   12 27 38.4   +21 34 10     1.283    2.083  130.4   21.6   136   12.3 
2024-05-04 00:00 UT   12 27 20.3   +21 25 31     1.289    2.082  129.7   21.9   135   12.4 
2024-05-05 00:00 UT   12 27 03.9   +21 16 34     1.295    2.082  128.9   22.2   134   12.4 
2024-05-06 00:00 UT   12 26 49.3   +21 07 20     1.301    2.081  128.1   22.4   134   12.4 
2024-05-07 00:00 UT   12 26 36.6   +20 57 50     1.308    2.081  127.3   22.7   133   12.4 
2024-05-08 00:00 UT   12 26 25.8   +20 48 03     1.315    2.080  126.5   22.9   132   12.4 
2024-05-09 00:00 UT   12 26 16.7   +20 37 60     1.322    2.080  125.7   23.2   132   12.4 
2024-05-10 00:00 UT   12 26 09.6   +20 27 42     1.329    2.079  125.0   23.5   131   12.5 
2024-05-11 00:00 UT   12 26 04.3   +20 17 08     1.336    2.079  124.2   23.7   130   12.5 
2024-05-12 00:00 UT   12 26 00.8   +20 06 21     1.343    2.078  123.4   23.9   130   12.5 
2024-05-13 00:00 UT   12 25 59.2   +19 55 19     1.350    2.078  122.7   24.2   129   12.5 
2024-05-14 00:00 UT   12 25 59.4   +19 44 03     1.357    2.077  121.9   24.4   129   12.5 
2024-05-15 00:00 UT   12 26 01.4   +19 32 35     1.365    2.077  121.2   24.6   128   12.6 
2024-05-16 00:00 UT   12 26 05.3   +19 20 53     1.373    2.076  120.4   24.8   127   12.6 
2024-05-17 00:00 UT   12 26 11.0   +19 08 60     1.380    2.076  119.7   25.0   127   12.6 
2024-05-18 00:00 UT   12 26 18.4   +18 56 54     1.388    2.076  118.9   25.2   126   12.6 
2024-05-19 00:00 UT   12 26 27.7   +18 44 38     1.396    2.075  118.2   25.4   126   12.6 
2024-05-20 00:00 UT   12 26 38.7   +18 32 10     1.404    2.075  117.5   25.6   125   12.6 
2024-05-21 00:00 UT   12 26 51.4   +18 19 31     1.412    2.075  116.7   25.8   125   12.7 
2024-05-22 00:00 UT   12 27 05.8   +18 06 42     1.420    2.074  116.0   26.0   125   12.7 
2024-05-23 00:00 UT   12 27 22.0   +17 53 43     1.428    2.074  115.3   26.2   124   12.7 
2024-05-24 00:00 UT   12 27 39.8   +17 40 35     1.437    2.074  114.6   26.4   124   12.7 
2024-05-25 00:00 UT   12 27 59.3   +17 27 18     1.445    2.073  113.9   26.5   123   12.7 

    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.