(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Sep 2026	12.7	3.105 AU	3.351 AU	15h50m	-16°08'	67.3°	17.4°
Opposition	15 Aug 2027	10.7	2.862 AU	1.859 AU	21h54m	-23°28'	169.8°	3.6°

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 Undina are:

            e (Eccentricity)                : 0.1047890
            a (Semimajor axis)              : 3.1862141
            i (Inclination)                 : 9.92313
            Ω (Longitude of ascending node) : 101.39303
            ω (Argument of perihelion)      : 236.56044
            M (Mean anomaly)                : 272.95053
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 157.55517
            B (Latitude of perihelion)      : -8.26786
            P (Orbital period in years)     : 5.69            
        

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
2026-09-15 00:00 UT   15 50 52.4   -16 08 05     3.351    3.105   67.3   17.4   101   12.7 
2026-09-15 07:41 UT   15 51 13.0   -16 09 58     3.355    3.104   67.1   17.4   101   12.7 
2026-09-16 00:00 UT   15 51 56.8   -16 13 58     3.363    3.104   66.6   17.3   101   12.7 
2026-09-17 00:00 UT   15 53 01.9   -16 19 50     3.375    3.103   65.9   17.2   100   12.7 
2026-09-18 00:00 UT   15 54 07.7   -16 25 41     3.386    3.102   65.2   17.1   100   12.8 
2026-09-19 00:00 UT   15 55 14.2   -16 31 31     3.398    3.101   64.5   17.0   100   12.8 
2026-09-20 00:00 UT   15 56 21.3   -16 37 20     3.409    3.100   63.8   16.9   100   12.8 
2026-09-21 00:00 UT   15 57 29.1   -16 43 08     3.421    3.099   63.1   16.8   100   12.8 
2026-09-22 00:00 UT   15 58 37.6   -16 48 55     3.432    3.098   62.4   16.7   100   12.8 
2026-09-23 00:00 UT   15 59 46.7   -16 54 41     3.443    3.097   61.7   16.6   100   12.8 
2026-09-24 00:00 UT   16 00 56.5   -17 00 26     3.454    3.096   61.1   16.5    99   12.8 
2026-09-25 00:00 UT   16 02 06.9   -17 06 09     3.465    3.095   60.4   16.4    99   12.8 
2026-09-26 00:00 UT   16 03 17.9   -17 11 51     3.476    3.094   59.7   16.2    99   12.8 
2026-09-27 00:00 UT   16 04 29.5   -17 17 32     3.487    3.093   59.0   16.1    99   12.8 
2026-09-28 00:00 UT   16 05 41.8   -17 23 11     3.498    3.092   58.3   16.0    99   12.8 
2026-09-29 00:00 UT   16 06 54.7   -17 28 49     3.509    3.091   57.7   15.9    99   12.8 
2026-09-30 00:00 UT   16 08 08.1   -17 34 25     3.519    3.090   57.0   15.8    99   12.8 
2026-10-01 00:00 UT   16 09 22.2   -17 39 59     3.530    3.089   56.3   15.6    98   12.8 
2026-10-02 00:00 UT   16 10 36.9   -17 45 32     3.540    3.088   55.6   15.5    98   12.8 
2026-10-03 00:00 UT   16 11 52.1   -17 51 03     3.551    3.087   55.0   15.4    98   12.8 
2026-10-04 00:00 UT   16 13 07.9   -17 56 32     3.561    3.086   54.3   15.3    98   12.8 
2026-10-05 00:00 UT   16 14 24.4   -18 01 59     3.571    3.085   53.6   15.1    98   12.8 
2026-10-06 00:00 UT   16 15 41.3   -18 07 25     3.581    3.084   52.9   15.0    98   12.8 
2026-10-07 00:00 UT   16 16 58.9   -18 12 48     3.591    3.083   52.3   14.9    98   12.8 
2026-10-08 00:00 UT   16 18 17.0   -18 18 10     3.601    3.082   51.6   14.7    97   12.8 
2026-10-09 00:00 UT   16 19 35.6   -18 23 29     3.611    3.081   50.9   14.6    97   12.8 
2026-10-10 00:00 UT   16 20 54.8   -18 28 47     3.621    3.080   50.3   14.4    97   12.8 
2026-10-11 00:00 UT   16 22 14.6   -18 34 02     3.630    3.079   49.6   14.3    97   12.8 
2026-10-12 00:00 UT   16 23 34.8   -18 39 14     3.640    3.078   49.0   14.2    97   12.8 

    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.