(118) Peitho
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	14.5	2.826 AU	2.857 AU	16h34m	-27°22'	78.1°	20.4°
Opposition	14 Sep 2026	11.9	2.369 AU	1.374 AU	23h47m	-13°28'	168.8°	4.7°

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 Peitho are:

            e (Eccentricity)                : 0.1633907
            a (Semimajor axis)              : 2.4378880
            i (Inclination)                 : 7.74653
            Ω (Longitude of ascending node) : 47.63437
            ω (Argument of perihelion)      : 33.09673
            M (Mean anomaly)                : 212.20808
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 80.49125
            B (Latitude of perihelion)      : 4.22097
            P (Orbital period in years)     : 3.81            
        

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   16 34 35.6   -27 22 23     2.857    2.826   78.1   20.4    99   14.5 
2025-09-16 02:19 UT   16 34 42.0   -27 22 33     2.858    2.826   78.0   20.4    99   14.5 
2025-09-17 00:00 UT   16 35 42.8   -27 24 09     2.870    2.826   77.3   20.3    99   14.5 
2025-09-18 00:00 UT   16 36 50.9   -27 25 55     2.883    2.825   76.6   20.2    99   14.5 
2025-09-19 00:00 UT   16 37 59.8   -27 27 42     2.896    2.825   75.9   20.2    99   14.5 
2025-09-20 00:00 UT   16 39 09.7   -27 29 28     2.909    2.825   75.2   20.1    99   14.5 
2025-09-21 00:00 UT   16 40 20.3   -27 31 15     2.922    2.824   74.5   20.0    99   14.5 
2025-09-22 00:00 UT   16 41 31.8   -27 33 02     2.935    2.824   73.8   20.0    99   14.5 
2025-09-23 00:00 UT   16 42 44.2   -27 34 48     2.947    2.823   73.1   19.9    99   14.5 
2025-09-24 00:00 UT   16 43 57.3   -27 36 34     2.960    2.823   72.4   19.8    99   14.5 
2025-09-25 00:00 UT   16 45 11.3   -27 38 20     2.973    2.823   71.7   19.7    99   14.5 
2025-09-26 00:00 UT   16 46 26.0   -27 40 05     2.985    2.822   71.0   19.6    99   14.5 
2025-09-27 00:00 UT   16 47 41.5   -27 41 50     2.998    2.822   70.3   19.5    99   14.5 
2025-09-28 00:00 UT   16 48 57.8   -27 43 34     3.010    2.821   69.6   19.4    99   14.5 
2025-09-29 00:00 UT   16 50 14.9   -27 45 17     3.022    2.821   68.9   19.3    99   14.6 
2025-09-30 00:00 UT   16 51 32.6   -27 47 00     3.035    2.821   68.2   19.3    99   14.6 
2025-10-01 00:00 UT   16 52 51.1   -27 48 42     3.047    2.820   67.5   19.2    99   14.6 
2025-10-02 00:00 UT   16 54 10.4   -27 50 23     3.059    2.820   66.8   19.0    99   14.6 
2025-10-03 00:00 UT   16 55 30.3   -27 52 03     3.071    2.819   66.1   18.9    99   14.6 
2025-10-04 00:00 UT   16 56 50.9   -27 53 42     3.083    2.819   65.5   18.8    99   14.6 
2025-10-05 00:00 UT   16 58 12.3   -27 55 20     3.095    2.818   64.8   18.7    99   14.6 
2025-10-06 00:00 UT   16 59 34.3   -27 56 56     3.107    2.818   64.1   18.6    99   14.6 
2025-10-07 00:00 UT   17 00 56.9   -27 58 31     3.119    2.817   63.4   18.5    98   14.6 
2025-10-08 00:00 UT   17 02 20.2   -28 00 05     3.131    2.817   62.8   18.4    98   14.6 
2025-10-09 00:00 UT   17 03 44.2   -28 01 38     3.142    2.816   62.1   18.3    98   14.6 
2025-10-10 00:00 UT   17 05 08.8   -28 03 08     3.154    2.816   61.4   18.1    98   14.6 
2025-10-11 00:00 UT   17 06 34.0   -28 04 38     3.165    2.815   60.7   18.0    98   14.6 
2025-10-12 00:00 UT   17 07 59.9   -28 06 05     3.177    2.815   60.1   17.9    98   14.6 
2025-10-13 00:00 UT   17 09 26.4   -28 07 31     3.188    2.814   59.4   17.8    98   14.6 
2025-10-14 00:00 UT   17 10 53.5   -28 08 55     3.199    2.814   58.7   17.6    98   14.6 
2025-10-15 00:00 UT   17 12 21.2   -28 10 18     3.210    2.813   58.1   17.5    98   14.6 

    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.