(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Dec 2025	13.1	3.369 AU	4.069 AU	14h43m	-07°42'	39.6°	10.7°
Opposition	16 May 2026	11.3	3.227 AU	2.228 AU	15h42m	-08°58'	169.6°	3.2°

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)                : 0.1048647
            a (Semimajor axis)              : 3.1854746
            i (Inclination)                 : 9.92326
            Ω (Longitude of ascending node) : 101.39208
            ω (Argument of perihelion)      : 236.68467
            M (Mean anomaly)                : 238.16041
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 157.67917
            B (Latitude of perihelion)      : -8.27987
            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
2025-12-12 00:00 UT   14 43 47.6   -07 42 33     4.069    3.369   39.6   10.7   297   13.1 
2025-12-12 19:03 UT   14 44 46.3   -07 46 39     4.061    3.368   40.1   10.9   297   13.1 
2025-12-13 00:00 UT   14 45 01.6   -07 47 42     4.059    3.368   40.2   10.9   297   13.1 
2025-12-14 00:00 UT   14 46 15.3   -07 52 48     4.048    3.367   40.9   11.0   297   13.1 
2025-12-15 00:00 UT   14 47 28.9   -07 57 50     4.038    3.366   41.6   11.2   296   13.1 
2025-12-16 00:00 UT   14 48 42.3   -08 02 48     4.028    3.365   42.3   11.4   296   13.1 
2025-12-17 00:00 UT   14 49 55.5   -08 07 42     4.017    3.364   43.0   11.5   296   13.1 
2025-12-18 00:00 UT   14 51 08.5   -08 12 32     4.006    3.364   43.7   11.7   295   13.1 
2025-12-19 00:00 UT   14 52 21.2   -08 17 19     3.995    3.363   44.4   11.8   295   13.1 
2025-12-20 00:00 UT   14 53 33.7   -08 22 02     3.984    3.362   45.1   12.0   295   13.1 
2025-12-21 00:00 UT   14 54 46.0   -08 26 41     3.973    3.361   45.8   12.1   295   13.1 
2025-12-22 00:00 UT   14 55 58.1   -08 31 16     3.962    3.360   46.5   12.3   294   13.1 
2025-12-23 00:00 UT   14 57 09.9   -08 35 47     3.950    3.360   47.2   12.4   294   13.1 
2025-12-24 00:00 UT   14 58 21.4   -08 40 14     3.939    3.359   47.9   12.5   294   13.1 
2025-12-25 00:00 UT   14 59 32.6   -08 44 37     3.927    3.358   48.6   12.7   294   13.1 
2025-12-26 00:00 UT   15 00 43.6   -08 48 56     3.915    3.357   49.3   12.8   293   13.1 
2025-12-27 00:00 UT   15 01 54.3   -08 53 11     3.903    3.356   50.0   13.0   293   13.1 
2025-12-28 00:00 UT   15 03 04.7   -08 57 23     3.891    3.356   50.7   13.1   293   13.1 
2025-12-29 00:00 UT   15 04 14.8   -09 01 30     3.879    3.355   51.4   13.2   293   13.1 
2025-12-30 00:00 UT   15 05 24.5   -09 05 33     3.867    3.354   52.1   13.4   292   13.1 
2025-12-31 00:00 UT   15 06 34.0   -09 09 32     3.855    3.353   52.8   13.5   292   13.0 
2026-01-01 00:00 UT   15 07 43.1   -09 13 27     3.842    3.352   53.5   13.6   292   13.0 
2026-01-02 00:00 UT   15 08 52.0   -09 17 18     3.830    3.351   54.2   13.8   292   13.0 
2026-01-03 00:00 UT   15 10 00.4   -09 21 04     3.817    3.351   55.0   13.9   291   13.0 
2026-01-04 00:00 UT   15 11 08.6   -09 24 47     3.804    3.350   55.7   14.0   291   13.0 
2026-01-05 00:00 UT   15 12 16.3   -09 28 25     3.791    3.349   56.4   14.2   291   13.0 
2026-01-06 00:00 UT   15 13 23.7   -09 31 60     3.778    3.348   57.1   14.3   291   13.0 
2026-01-07 00:00 UT   15 14 30.8   -09 35 30     3.765    3.347   57.9   14.4   291   13.0 
2026-01-08 00:00 UT   15 15 37.4   -09 38 56     3.752    3.346   58.6   14.5   290   13.0 
2026-01-09 00:00 UT   15 16 43.7   -09 42 18     3.739    3.345   59.3   14.6   290   13.0 

    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.