(69) Hesperia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Sep 2025	12.4	2.566 AU	3.543 AU	10h37m	+05°18'	11.7°	4.6°
Opposition	12 Apr 2026	11.1	2.887 AU	1.886 AU	13h28m	-05°00'	176.1°	1.4°

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 Hesperia are:

            e (Eccentricity)                : 0.1692846
            a (Semimajor axis)              : 2.9782674
            i (Inclination)                 : 8.58432
            Ω (Longitude of ascending node) : 184.90389
            ω (Argument of perihelion)      : 288.18018
            M (Mean anomaly)                : 4.38864
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 113.27628
            B (Latitude of perihelion)      : -8.15280
            P (Orbital period in years)     : 5.14            
        

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
2025-09-13 00:00 UT   10 37 09.5   +05 18 27     3.543    2.566   11.7    4.6   276   12.4 
2025-09-13 19:00 UT   10 38 30.8   +05 11 23     3.542    2.567   12.1    4.7   277   12.4 
2025-09-14 00:00 UT   10 38 52.2   +05 09 31     3.541    2.567   12.2    4.7   277   12.4 
2025-09-15 00:00 UT   10 40 34.7   +05 00 34     3.540    2.568   12.7    4.9   278   12.4 
2025-09-16 00:00 UT   10 42 17.1   +04 51 36     3.538    2.569   13.2    5.1   279   12.4 
2025-09-17 00:00 UT   10 43 59.2   +04 42 37     3.536    2.570   13.7    5.3   279   12.4 
2025-09-18 00:00 UT   10 45 41.2   +04 33 37     3.534    2.571   14.2    5.5   280   12.4 
2025-09-19 00:00 UT   10 47 23.1   +04 24 36     3.532    2.573   14.7    5.7   281   12.5 
2025-09-20 00:00 UT   10 49 04.7   +04 15 34     3.529    2.574   15.2    5.9   281   12.5 
2025-09-21 00:00 UT   10 50 46.2   +04 06 32     3.527    2.575   15.7    6.1   282   12.5 
2025-09-22 00:00 UT   10 52 27.5   +03 57 29     3.524    2.576   16.2    6.3   282   12.5 
2025-09-23 00:00 UT   10 54 08.6   +03 48 25     3.522    2.577   16.8    6.4   283   12.5 
2025-09-24 00:00 UT   10 55 49.5   +03 39 21     3.519    2.578   17.3    6.6   283   12.5 
2025-09-25 00:00 UT   10 57 30.2   +03 30 16     3.516    2.580   17.8    6.8   283   12.5 
2025-09-26 00:00 UT   10 59 10.7   +03 21 11     3.513    2.581   18.3    7.0   284   12.5 
2025-09-27 00:00 UT   11 00 51.0   +03 12 05     3.510    2.582   18.9    7.2   284   12.5 
2025-09-28 00:00 UT   11 02 31.1   +03 02 60     3.507    2.583   19.4    7.4   285   12.5 
2025-09-29 00:00 UT   11 04 11.1   +02 53 54     3.504    2.584   19.9    7.6   285   12.5 
2025-09-30 00:00 UT   11 05 50.8   +02 44 48     3.500    2.586   20.5    7.8   285   12.5 
2025-10-01 00:00 UT   11 07 30.3   +02 35 42     3.497    2.587   21.0    8.0   286   12.6 
2025-10-02 00:00 UT   11 09 09.7   +02 26 36     3.493    2.588   21.5    8.2   286   12.6 

    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.