(164) Eva
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 Dec 2025	14.0	2.579 AU	3.504 AU	17h18m	-22°10'	16.8°	6.3°
Opposition	31 Aug 2026	11.0	1.754 AU	0.931 AU	00h36m	-53°17'	129.3°	26.4°

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 Eva are:

            e (Eccentricity)                : 0.3463142
            a (Semimajor axis)              : 2.6326903
            i (Inclination)                 : 24.47471
            Ω (Longitude of ascending node) : 76.78065
            ω (Argument of perihelion)      : 284.01979
            M (Mean anomaly)                : 284.44450
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 2.12209
            B (Latitude of perihelion)      : -23.70018
            P (Orbital period in years)     : 4.27            
        

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
2025-12-29 00:00 UT   17 18 19.9   -22 10 13     3.504    2.579   16.8    6.3   277   14.0 
2025-12-29 04:51 UT   17 18 42.2   -22 11 25     3.503    2.578   16.9    6.4   277   14.0 
2025-12-30 00:00 UT   17 20 10.1   -22 16 07     3.496    2.575   17.4    6.6   277   14.0 
2025-12-31 00:00 UT   17 22 00.5   -22 21 57     3.488    2.571   18.0    6.8   276   14.0 
2026-01-01 00:00 UT   17 23 51.1   -22 27 43     3.480    2.567   18.6    7.0   276   14.0 
2026-01-02 00:00 UT   17 25 42.1   -22 33 26     3.472    2.564   19.2    7.2   275   14.0 
2026-01-03 00:00 UT   17 27 33.3   -22 39 05     3.464    2.560   19.7    7.5   275   14.0 
2026-01-04 00:00 UT   17 29 24.9   -22 44 41     3.455    2.556   20.3    7.7   274   14.0 
2026-01-05 00:00 UT   17 31 16.7   -22 50 13     3.447    2.552   20.9    7.9   274   14.1 
2026-01-06 00:00 UT   17 33 08.7   -22 55 41     3.438    2.548   21.5    8.1   274   14.1 
2026-01-07 00:00 UT   17 35 01.1   -23 01 06     3.429    2.545   22.1    8.3   273   14.1 
2026-01-08 00:00 UT   17 36 53.7   -23 06 27     3.420    2.541   22.7    8.6   273   14.1 
2026-01-09 00:00 UT   17 38 46.6   -23 11 44     3.411    2.537   23.2    8.8   272   14.1 
2026-01-10 00:00 UT   17 40 39.7   -23 16 58     3.402    2.533   23.8    9.0   272   14.1 
2026-01-11 00:00 UT   17 42 33.1   -23 22 08     3.392    2.530   24.4    9.2   272   14.1 
2026-01-12 00:00 UT   17 44 26.8   -23 27 14     3.383    2.526   25.0    9.5   271   14.1 
2026-01-13 00:00 UT   17 46 20.7   -23 32 17     3.373    2.522   25.6    9.7   271   14.1 
2026-01-14 00:00 UT   17 48 14.9   -23 37 16     3.364    2.518   26.1    9.9   271   14.1 
2026-01-15 00:00 UT   17 50 09.3   -23 42 11     3.354    2.514   26.7   10.1   270   14.1 
2026-01-16 00:00 UT   17 52 04.0   -23 47 03     3.344    2.510   27.3   10.4   270   14.1 
2026-01-17 00:00 UT   17 53 58.8   -23 51 52     3.334    2.507   27.9   10.6   270   14.1 

    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.