(550) Senta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	14.6	2.681 AU	2.606 AU	05h59m	+27°30'	83.3°	21.9°
Opposition	17 Dec 2025	13.1	2.873 AU	1.889 AU	05h44m	+24°37'	178.4°	0.6°

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 Senta are:

            e (Eccentricity)                : 0.2220661
            a (Semimajor axis)              : 2.5885514
            i (Inclination)                 : 10.10686
            Ω (Longitude of ascending node) : 270.65941
            ω (Argument of perihelion)      : 45.21240
            M (Mean anomaly)                : 54.95804
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 315.42378
            B (Latitude of perihelion)      : 7.15451
            P (Orbital period in years)     : 4.16            
        

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
2025-09-16 00:00 UT   05 59 02.1   +27 30 15     2.606    2.681   83.3   21.9   270   14.6 
2025-09-16 22:55 UT   05 59 58.8   +27 29 24     2.595    2.683   84.0   21.9   270   14.6 
2025-09-17 00:00 UT   06 00 01.5   +27 29 21     2.594    2.683   84.0   21.9   270   14.6 
2025-09-18 00:00 UT   06 00 59.8   +27 28 26     2.583    2.685   84.8   21.9   270   14.6 
2025-09-19 00:00 UT   06 01 56.8   +27 27 30     2.572    2.688   85.5   21.9   271   14.6 
2025-09-20 00:00 UT   06 02 52.7   +27 26 31     2.561    2.690   86.3   21.9   271   14.6 
2025-09-21 00:00 UT   06 03 47.4   +27 25 31     2.549    2.692   87.1   21.9   271   14.6 
2025-09-22 00:00 UT   06 04 40.8   +27 24 29     2.538    2.694   87.9   21.9   271   14.6 
2025-09-23 00:00 UT   06 05 33.0   +27 23 26     2.527    2.696   88.6   21.8   271   14.6 
2025-09-24 00:00 UT   06 06 23.9   +27 22 21     2.515    2.699   89.4   21.8   271   14.6 
2025-09-25 00:00 UT   06 07 13.5   +27 21 14     2.504    2.701   90.2   21.8   271   14.5 
2025-09-26 00:00 UT   06 08 01.8   +27 20 07     2.492    2.703   91.0   21.8   271   14.5 
2025-09-27 00:00 UT   06 08 48.8   +27 18 58     2.481    2.705   91.8   21.7   271   14.5 
2025-09-28 00:00 UT   06 09 34.4   +27 17 47     2.470    2.708   92.6   21.7   271   14.5 
2025-09-29 00:00 UT   06 10 18.7   +27 16 36     2.458    2.710   93.5   21.7   271   14.5 
2025-09-30 00:00 UT   06 11 01.7   +27 15 23     2.447    2.712   94.3   21.6   271   14.5 
2025-10-01 00:00 UT   06 11 43.2   +27 14 09     2.435    2.714   95.1   21.6   271   14.5 
2025-10-02 00:00 UT   06 12 23.3   +27 12 54     2.424    2.716   95.9   21.5   271   14.5 
2025-10-03 00:00 UT   06 13 02.1   +27 11 38     2.413    2.719   96.8   21.4   271   14.5 
2025-10-04 00:00 UT   06 13 39.4   +27 10 21     2.401    2.721   97.6   21.4   271   14.5 
2025-10-05 00:00 UT   06 14 15.2   +27 09 03     2.390    2.723   98.5   21.3   271   14.4 
2025-10-06 00:00 UT   06 14 49.6   +27 07 44     2.379    2.725   99.3   21.2   271   14.4 
2025-10-07 00:00 UT   06 15 22.4   +27 06 24     2.367    2.727  100.2   21.1   271   14.4 
2025-10-08 00:00 UT   06 15 53.8   +27 05 03     2.356    2.730  101.0   21.1   271   14.4 
2025-10-09 00:00 UT   06 16 23.7   +27 03 42     2.345    2.732  101.9   21.0   271   14.4 
2025-10-10 00:00 UT   06 16 52.0   +27 02 19     2.333    2.734  102.8   20.9   271   14.4 
2025-10-11 00:00 UT   06 17 18.8   +27 00 56     2.322    2.736  103.7   20.8   271   14.4 
2025-10-12 00:00 UT   06 17 43.9   +26 59 32     2.311    2.738  104.6   20.7   271   14.4 
2025-10-13 00:00 UT   06 18 07.5   +26 58 08     2.300    2.741  105.5   20.5   271   14.4 
2025-10-14 00:00 UT   06 18 29.5   +26 56 42     2.289    2.743  106.4   20.4   271   14.3 
2025-10-15 00:00 UT   06 18 49.8   +26 55 16     2.278    2.745  107.3   20.3   271   14.3 
2025-10-16 00:00 UT   06 19 08.5   +26 53 49     2.267    2.747  108.2   20.2   271   14.3 

    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.