(747) Winchester
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Oct 2026	13.3	2.459 AU	3.010 AU	09h32m	+13°01'	48.2°	17.7°
Opposition	22 Feb 2027	12.2	2.963 AU	1.988 AU	10h40m	+20°57'	168.4°	3.9°

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 Winchester are:

            e (Eccentricity)                : 0.3397865
            a (Semimajor axis)              : 2.9993934
            i (Inclination)                 : 18.22156
            Ω (Longitude of ascending node) : 129.04851
            ω (Argument of perihelion)      : 277.66406
            M (Mean anomaly)                : 19.46596
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 47.11199
            B (Latitude of perihelion)      : -18.05315
            P (Orbital period in years)     : 5.19            
        

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
2026-10-03 00:00 UT   09 32 33.0   +13 01 38     3.010    2.459   48.2   17.7   287   13.3 
2026-10-03 23:32 UT   09 34 06.8   +12 57 49     3.004    2.462   48.8   17.8   287   13.3 
2026-10-04 00:00 UT   09 34 08.6   +12 57 44     3.003    2.463   48.8   17.8   287   13.3 
2026-10-05 00:00 UT   09 35 43.7   +12 53 52     2.997    2.466   49.4   17.9   288   13.3 
2026-10-06 00:00 UT   09 37 18.1   +12 50 01     2.990    2.470   50.0   18.1   288   13.3 
2026-10-07 00:00 UT   09 38 52.0   +12 46 11     2.984    2.473   50.6   18.2   288   13.3 
2026-10-08 00:00 UT   09 40 25.4   +12 42 22     2.977    2.477   51.2   18.3   288   13.3 
2026-10-09 00:00 UT   09 41 58.1   +12 38 36     2.970    2.480   51.8   18.5   288   13.3 
2026-10-10 00:00 UT   09 43 30.2   +12 34 50     2.963    2.484   52.4   18.6   288   13.3 
2026-10-11 00:00 UT   09 45 01.7   +12 31 07     2.956    2.487   53.1   18.7   289   13.3 
2026-10-12 00:00 UT   09 46 32.6   +12 27 26     2.949    2.491   53.7   18.8   289   13.3 
2026-10-13 00:00 UT   09 48 02.9   +12 23 47     2.941    2.494   54.3   19.0   289   13.3 
2026-10-14 00:00 UT   09 49 32.6   +12 20 10     2.934    2.498   54.9   19.1   289   13.3 
2026-10-15 00:00 UT   09 51 01.7   +12 16 35     2.926    2.501   55.5   19.2   289   13.3 
2026-10-16 00:00 UT   09 52 30.1   +12 13 03     2.919    2.505   56.2   19.3   289   13.3 
2026-10-17 00:00 UT   09 53 57.9   +12 09 33     2.911    2.508   56.8   19.4   289   13.3 
2026-10-18 00:00 UT   09 55 25.0   +12 06 06     2.903    2.512   57.5   19.5   290   13.3 
2026-10-19 00:00 UT   09 56 51.5   +12 02 42     2.895    2.515   58.1   19.6   290   13.3 
2026-10-20 00:00 UT   09 58 17.4   +11 59 21     2.887    2.519   58.7   19.8   290   13.3 
2026-10-21 00:00 UT   09 59 42.5   +11 56 03     2.879    2.522   59.4   19.9   290   13.3 
2026-10-22 00:00 UT   10 01 07.0   +11 52 49     2.871    2.526   60.0   20.0   290   13.3 
2026-10-23 00:00 UT   10 02 30.9   +11 49 37     2.863    2.530   60.7   20.1   290   13.3 
2026-10-24 00:00 UT   10 03 54.1   +11 46 29     2.855    2.533   61.4   20.2   290   13.3 
2026-10-25 00:00 UT   10 05 16.6   +11 43 25     2.846    2.537   62.0   20.3   290   13.3 
2026-10-26 00:00 UT   10 06 38.4   +11 40 24     2.838    2.540   62.7   20.4   291   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.