(54) Alexandra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Apr 2024	13.1	2.532 AU	3.512 AU	01h11m	+16°00'	10.8°	4.3°
Opposition	29 Nov 2024	12.3	2.969 AU	2.009 AU	04h09m	+37°22'	163.9°	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 Alexandra are:

            e (Eccentricity)                : 0.1967055
            a (Semimajor axis)              : 2.7106196
            i (Inclination)                 : 11.79695
            Ω (Longitude of ascending node) : 313.22981
            ω (Argument of perihelion)      : 345.29688
            M (Mean anomaly)                : 11.23687
            Epoch                           : 2023 Sep 13

            L (Longitude of perihelion)     : 298.82419
            B (Latitude of perihelion)      : -2.97442
            P (Orbital period in years)     : 4.46            
        

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
2024-04-20 00:00 UT   01 11 34.7   +16 00 15     3.512    2.532   10.8    4.3   293   13.1 
2024-04-20 05:55 UT   01 12 00.0   +16 03 04     3.512    2.533   10.9    4.3   293   13.1 
2024-04-21 00:00 UT   01 13 17.5   +16 11 43     3.513    2.534   11.2    4.4   292   13.1 
2024-04-22 00:00 UT   01 15 00.3   +16 23 09     3.513    2.536   11.5    4.6   290   13.1 
2024-04-23 00:00 UT   01 16 43.1   +16 34 32     3.513    2.538   11.9    4.7   288   13.1 
2024-04-24 00:00 UT   01 18 25.9   +16 45 54     3.514    2.540   12.4    4.9   287   13.2 
2024-04-25 00:00 UT   01 20 08.6   +16 57 13     3.514    2.543   12.8    5.0   286   13.2 
2024-04-26 00:00 UT   01 21 51.2   +17 08 30     3.514    2.545   13.2    5.2   284   13.2 
2024-04-27 00:00 UT   01 23 33.9   +17 19 44     3.514    2.547   13.6    5.3   283   13.2 
2024-04-28 00:00 UT   01 25 16.5   +17 30 57     3.514    2.549   14.1    5.5   282   13.2 
2024-04-29 00:00 UT   01 26 59.0   +17 42 07     3.513    2.551   14.5    5.7   281   13.2 
2024-04-30 00:00 UT   01 28 41.6   +17 53 14     3.513    2.553   14.9    5.8   280   13.2 
2024-05-01 00:00 UT   01 30 24.0   +18 04 19     3.512    2.555   15.4    6.0   279   13.2 
2024-05-02 00:00 UT   01 32 06.5   +18 15 22     3.512    2.557   15.9    6.2   278   13.2 
2024-05-03 00:00 UT   01 33 48.9   +18 26 22     3.511    2.559   16.3    6.4   277   13.2 
2024-05-04 00:00 UT   01 35 31.3   +18 37 20     3.510    2.561   16.8    6.5   277   13.3 
2024-05-05 00:00 UT   01 37 13.6   +18 48 15     3.509    2.563   17.2    6.7   276   13.3 
2024-05-06 00:00 UT   01 38 55.8   +18 59 07     3.508    2.565   17.7    6.9   275   13.3 
2024-05-07 00:00 UT   01 40 38.1   +19 09 57     3.507    2.568   18.2    7.0   274   13.3 
2024-05-08 00:00 UT   01 42 20.2   +19 20 45     3.505    2.570   18.7    7.2   274   13.3 
2024-05-09 00:00 UT   01 44 02.3   +19 31 29     3.504    2.572   19.1    7.4   273   13.3 

    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.