(54) Alexandra
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Sep 2025	14.2	3.247 AU	3.854 AU	08h43m	+21°30'	46.6°	13.0°
Opposition	4 Feb 2026	12.3	3.218 AU	2.232 AU	09h10m	+15°35'	179.3°	0.2°

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)                : 0.1972818
            a (Semimajor axis)              : 2.7144119
            i (Inclination)                 : 11.81106
            Ω (Longitude of ascending node) : 313.06012
            ω (Argument of perihelion)      : 345.97112
            M (Mean anomaly)                : 143.00388
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 299.31688
            B (Latitude of perihelion)      : -2.84406
            P (Orbital period in years)     : 4.47            
        

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
2025-09-17 00:00 UT   08 43 00.1   +21 30 49     3.854    3.247   46.6   13.0   288   14.2 
2025-09-17 11:10 UT   08 43 33.5   +21 28 16     3.849    3.247   47.0   13.1   288   14.2 
2025-09-18 00:00 UT   08 44 11.7   +21 25 20     3.843    3.247   47.3   13.2   288   14.2 
2025-09-19 00:00 UT   08 45 22.9   +21 19 51     3.833    3.247   48.0   13.3   288   14.2 
2025-09-20 00:00 UT   08 46 33.6   +21 14 22     3.822    3.247   48.7   13.4   288   14.2 
2025-09-21 00:00 UT   08 47 43.9   +21 08 53     3.811    3.248   49.4   13.6   288   14.2 
2025-09-22 00:00 UT   08 48 53.6   +21 03 23     3.800    3.248   50.1   13.7   288   14.2 
2025-09-23 00:00 UT   08 50 02.9   +20 57 54     3.789    3.248   50.8   13.8   288   14.2 
2025-09-24 00:00 UT   08 51 11.7   +20 52 25     3.777    3.248   51.4   14.0   288   14.2 
2025-09-25 00:00 UT   08 52 20.0   +20 46 56     3.766    3.248   52.1   14.1   288   14.2 
2025-09-26 00:00 UT   08 53 27.8   +20 41 27     3.754    3.248   52.8   14.2   288   14.2 
2025-09-27 00:00 UT   08 54 35.0   +20 35 58     3.743    3.248   53.5   14.4   288   14.2 
2025-09-28 00:00 UT   08 55 41.8   +20 30 30     3.731    3.249   54.2   14.5   288   14.2 
2025-09-29 00:00 UT   08 56 48.0   +20 25 02     3.719    3.249   54.9   14.6   288   14.2 
2025-09-30 00:00 UT   08 57 53.7   +20 19 35     3.707    3.249   55.7   14.7   288   14.2 
2025-10-01 00:00 UT   08 58 58.8   +20 14 08     3.695    3.249   56.4   14.9   288   14.2 
2025-10-02 00:00 UT   09 00 03.4   +20 08 41     3.682    3.249   57.1   15.0   288   14.2 
2025-10-03 00:00 UT   09 01 07.4   +20 03 15     3.670    3.249   57.8   15.1   288   14.2 
2025-10-04 00:00 UT   09 02 10.9   +19 57 50     3.658    3.249   58.5   15.2   288   14.2 
2025-10-05 00:00 UT   09 03 13.8   +19 52 26     3.645    3.249   59.2   15.3   288   14.2 
2025-10-06 00:00 UT   09 04 16.1   +19 47 02     3.633    3.249   60.0   15.4   288   14.2 
2025-10-07 00:00 UT   09 05 17.8   +19 41 39     3.620    3.249   60.7   15.6   288   14.2 
2025-10-08 00:00 UT   09 06 19.0   +19 36 17     3.607    3.250   61.4   15.7   288   14.2 
2025-10-09 00:00 UT   09 07 19.5   +19 30 56     3.594    3.250   62.1   15.8   288   14.2 
2025-10-10 00:00 UT   09 08 19.5   +19 25 36     3.581    3.250   62.9   15.9   288   14.2 
2025-10-11 00:00 UT   09 09 18.8   +19 20 17     3.568    3.250   63.6   16.0   288   14.1 
2025-10-12 00:00 UT   09 10 17.5   +19 14 59     3.555    3.250   64.4   16.1   288   14.1 
2025-10-13 00:00 UT   09 11 15.6   +19 09 43     3.541    3.250   65.1   16.2   288   14.1 
2025-10-14 00:00 UT   09 12 13.0   +19 04 28     3.528    3.250   65.8   16.3   288   14.1 
2025-10-15 00:00 UT   09 13 09.8   +18 59 14     3.514    3.250   66.6   16.4   288   14.1 
2025-10-16 00:00 UT   09 14 05.9   +18 54 01     3.501    3.250   67.3   16.4   289   14.1 
2025-10-17 00:00 UT   09 15 01.4   +18 48 50     3.487    3.250   68.1   16.5   289   14.1 

    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.