(78) Diana
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	1 Nov 2026	13.7	2.989 AU	2.522 AU	21h52m	-10°36'	108.5°	18.4°
Opposition	13 Dec 2027	11.0	2.199 AU	1.233 AU	05h21m	+38°00'	165.1°	6.6°

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 Diana are:

            e (Eccentricity)                : 0.2035330
            a (Semimajor axis)              : 2.6225476
            i (Inclination)                 : 8.67948
            Ω (Longitude of ascending node) : 333.28391
            ω (Argument of perihelion)      : 153.31918
            M (Mean anomaly)                : 201.42507
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 306.86695
            B (Latitude of perihelion)      : 3.88535
            P (Orbital period in years)     : 4.25            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-11-01 00:00 UT   21 52 50.3   -10 36 45     2.522    2.989  108.5   18.4    71   13.7 
2026-11-01 14:28 UT   21 52 58.6   -10 35 17     2.530    2.988  107.9   18.4    71   13.7 
2026-11-02 00:00 UT   21 53 04.3   -10 34 18     2.535    2.988  107.6   18.5    71   13.7 
2026-11-03 00:00 UT   21 53 19.5   -10 31 45     2.547    2.987  106.6   18.6    71   13.7 
2026-11-04 00:00 UT   21 53 36.0   -10 29 06     2.560    2.985  105.7   18.7    71   13.8 
2026-11-05 00:00 UT   21 53 53.8   -10 26 21     2.572    2.984  104.8   18.7    71   13.8 
2026-11-06 00:00 UT   21 54 12.9   -10 23 30     2.585    2.982  103.9   18.8    71   13.8 
2026-11-07 00:00 UT   21 54 33.2   -10 20 34     2.597    2.981  103.0   18.9    71   13.8 
2026-11-08 00:00 UT   21 54 54.7   -10 17 32     2.610    2.980  102.1   19.0    71   13.8 
2026-11-09 00:00 UT   21 55 17.4   -10 14 24     2.623    2.978  101.2   19.0    71   13.8 
2026-11-10 00:00 UT   21 55 41.4   -10 11 10     2.636    2.977  100.3   19.1    70   13.8 
2026-11-11 00:00 UT   21 56 06.5   -10 07 50     2.649    2.975   99.4   19.2    70   13.8 
2026-11-12 00:00 UT   21 56 32.8   -10 04 25     2.661    2.974   98.5   19.2    70   13.8 
2026-11-13 00:00 UT   21 57 00.3   -10 00 54     2.674    2.972   97.6   19.3    70   13.9 
2026-11-14 00:00 UT   21 57 28.9   -09 57 17     2.687    2.971   96.8   19.3    70   13.9 
2026-11-15 00:00 UT   21 57 58.6   -09 53 35     2.700    2.969   95.9   19.4    70   13.9 
2026-11-16 00:00 UT   21 58 29.4   -09 49 48     2.713    2.968   95.0   19.4    70   13.9 
2026-11-17 00:00 UT   21 59 01.4   -09 45 54     2.726    2.967   94.2   19.4    70   13.9 
2026-11-18 00:00 UT   21 59 34.4   -09 41 56     2.739    2.965   93.3   19.4    70   13.9 
2026-11-19 00:00 UT   22 00 08.5   -09 37 52     2.752    2.964   92.5   19.5    70   13.9 
2026-11-20 00:00 UT   22 00 43.6   -09 33 42     2.765    2.962   91.6   19.5    70   13.9 
2026-11-21 00:00 UT   22 01 19.7   -09 29 28     2.778    2.961   90.8   19.5    70   13.9 
2026-11-22 00:00 UT   22 01 56.9   -09 25 07     2.791    2.959   89.9   19.5    70   13.9 
2026-11-23 00:00 UT   22 02 35.1   -09 20 42     2.804    2.958   89.1   19.5    70   14.0 
2026-11-24 00:00 UT   22 03 14.2   -09 16 12     2.817    2.956   88.3   19.5    70   14.0 
2026-11-25 00:00 UT   22 03 54.3   -09 11 36     2.830    2.955   87.4   19.5    70   14.0 
2026-11-26 00:00 UT   22 04 35.4   -09 06 55     2.843    2.953   86.6   19.5    69   14.0 
2026-11-27 00:00 UT   22 05 17.4   -09 02 09     2.855    2.952   85.8   19.5    69   14.0 
2026-11-28 00:00 UT   22 06 00.3   -08 57 18     2.868    2.950   85.0   19.5    69   14.0 
2026-11-29 00:00 UT   22 06 44.1   -08 52 22     2.881    2.949   84.2   19.4    69   14.0 
2026-11-30 00:00 UT   22 07 28.8   -08 47 21     2.894    2.947   83.3   19.4    69   14.0 
2026-12-01 00:00 UT   22 08 14.4   -08 42 15     2.907    2.946   82.5   19.4    69   14.0 

    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.