(27) Euterpe
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	13 Aug 2025	10.2	2.564 AU	1.551 AU	21h35m	-16°20'	178.1°	0.7°
Today	15 Sep 2025	10.9	2.513 AU	1.644 AU	21h08m	-18°30'	141.9°	14.3°

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 Euterpe are:

            e (Eccentricity)                : 0.1715064
            a (Semimajor axis)              : 2.3475338
            i (Inclination)                 : 1.58333
            Ω (Longitude of ascending node) : 94.76734
            ω (Argument of perihelion)      : 356.51892
            M (Mean anomaly)                : 218.18562
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 91.28759
            B (Latitude of perihelion)      : -0.09613
            P (Orbital period in years)     : 3.60            
        

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
2025-09-15 00:00 UT   21 08 02.9   -18 30 07     1.644    2.513  141.9   14.3    71   10.9 
2025-09-15 14:38 UT   21 07 44.1   -18 31 21     1.649    2.512  141.2   14.5    71   10.9 
2025-09-16 00:00 UT   21 07 32.4   -18 32 06     1.651    2.512  140.8   14.7    71   10.9 
2025-09-17 00:00 UT   21 07 03.5   -18 33 57     1.658    2.510  139.7   15.0    71   11.0 
2025-09-18 00:00 UT   21 06 36.3   -18 35 40     1.665    2.508  138.6   15.4    71   11.0 
2025-09-19 00:00 UT   21 06 10.8   -18 37 15     1.672    2.507  137.5   15.7    71   11.0 
2025-09-20 00:00 UT   21 05 47.0   -18 38 41     1.680    2.505  136.4   16.0    71   11.0 
2025-09-21 00:00 UT   21 05 25.0   -18 39 59     1.688    2.503  135.4   16.4    71   11.0 
2025-09-22 00:00 UT   21 05 04.7   -18 41 08     1.695    2.502  134.3   16.7    71   11.1 
2025-09-23 00:00 UT   21 04 46.3   -18 42 09     1.703    2.500  133.2   17.0    72   11.1 
2025-09-24 00:00 UT   21 04 29.6   -18 43 01     1.711    2.498  132.2   17.3    72   11.1 
2025-09-25 00:00 UT   21 04 14.7   -18 43 45     1.720    2.497  131.2   17.6    72   11.1 
2025-09-26 00:00 UT   21 04 01.7   -18 44 21     1.728    2.495  130.1   17.9    72   11.1 
2025-09-27 00:00 UT   21 03 50.4   -18 44 49     1.737    2.493  129.1   18.2    72   11.2 
2025-09-28 00:00 UT   21 03 40.9   -18 45 08     1.745    2.492  128.1   18.5    72   11.2 
2025-09-29 00:00 UT   21 03 33.3   -18 45 19     1.754    2.490  127.1   18.7    72   11.2 
2025-09-30 00:00 UT   21 03 27.5   -18 45 22     1.763    2.488  126.1   19.0    72   11.2 
2025-10-01 00:00 UT   21 03 23.4   -18 45 17     1.772    2.487  125.1   19.2    72   11.2 
2025-10-02 00:00 UT   21 03 21.2   -18 45 04     1.782    2.485  124.1   19.5    72   11.2 
2025-10-03 00:00 UT   21 03 20.8   -18 44 43     1.791    2.483  123.1   19.7    72   11.3 
2025-10-04 00:00 UT   21 03 22.1   -18 44 14     1.800    2.481  122.1   20.0    72   11.3 
2025-10-05 00:00 UT   21 03 25.2   -18 43 37     1.810    2.480  121.2   20.2    72   11.3 
2025-10-06 00:00 UT   21 03 30.1   -18 42 53     1.820    2.478  120.2   20.4    72   11.3 
2025-10-07 00:00 UT   21 03 36.7   -18 42 01     1.829    2.476  119.2   20.6    72   11.3 
2025-10-08 00:00 UT   21 03 45.0   -18 41 01     1.839    2.475  118.3   20.8    72   11.3 
2025-10-09 00:00 UT   21 03 55.1   -18 39 53     1.849    2.473  117.4   21.0    72   11.4 
2025-10-10 00:00 UT   21 04 06.8   -18 38 39     1.859    2.471  116.4   21.2    72   11.4 
2025-10-11 00:00 UT   21 04 20.3   -18 37 16     1.869    2.469  115.5   21.4    72   11.4 
2025-10-12 00:00 UT   21 04 35.5   -18 35 47     1.880    2.468  114.6   21.6    73   11.4 
2025-10-13 00:00 UT   21 04 52.3   -18 34 10     1.890    2.466  113.6   21.8    73   11.4 
2025-10-14 00:00 UT   21 05 10.7   -18 32 26     1.900    2.464  112.7   21.9    73   11.4 
2025-10-15 00:00 UT   21 05 30.8   -18 30 34     1.911    2.462  111.8   22.1    73   11.5 

    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.