(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Jul 2025	13.2	3.465 AU	3.888 AU	11h49m	+10°45'	58.4°	14.5°
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)                : 0.1049890
            a (Semimajor axis)              : 3.1848901
            i (Inclination)                 : 9.92326
            Ω (Longitude of ascending node) : 101.39359
            ω (Argument of perihelion)      : 236.76975
            M (Mean anomaly)                : 203.39111
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 157.76627
            B (Latitude of perihelion)      : -8.28800
            P (Orbital period in years)     : 5.68            
        

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
2025-07-18 00:00 UT   11 49 31.7   +10 45 10     3.888    3.465   58.4   14.5   108   13.2 
2025-07-18 23:02 UT   11 50 24.5   +10 37 50     3.899    3.465   57.8   14.4   108   13.2 
2025-07-19 00:00 UT   11 50 26.8   +10 37 31     3.899    3.465   57.7   14.4   108   13.2 
2025-07-20 00:00 UT   11 51 22.2   +10 29 51     3.910    3.464   57.1   14.2   108   13.2 
2025-07-21 00:00 UT   11 52 18.1   +10 22 09     3.922    3.464   56.4   14.1   108   13.2 
2025-07-22 00:00 UT   11 53 14.5   +10 14 25     3.933    3.463   55.7   14.0   108   13.2 
2025-07-23 00:00 UT   11 54 11.2   +10 06 39     3.944    3.463   55.0   13.9   108   13.2 
2025-07-24 00:00 UT   11 55 08.4   +09 58 52     3.955    3.462   54.3   13.8   107   13.2 
2025-07-25 00:00 UT   11 56 06.0   +09 51 03     3.966    3.462   53.7   13.7   107   13.2 
2025-07-26 00:00 UT   11 57 04.0   +09 43 12     3.976    3.461   53.0   13.6   107   13.2 
2025-07-27 00:00 UT   11 58 02.4   +09 35 20     3.987    3.461   52.3   13.4   107   13.2 
2025-07-28 00:00 UT   11 59 01.1   +09 27 27     3.997    3.460   51.7   13.3   107   13.2 
2025-07-29 00:00 UT   12 00 00.3   +09 19 32     4.008    3.460   51.0   13.2   107   13.2 
2025-07-30 00:00 UT   12 00 59.8   +09 11 36     4.018    3.459   50.3   13.1   107   13.2 
2025-07-31 00:00 UT   12 01 59.7   +09 03 38     4.028    3.459   49.7   12.9   106   13.2 
2025-08-01 00:00 UT   12 02 59.9   +08 55 39     4.038    3.458   49.0   12.8   106   13.2 
2025-08-02 00:00 UT   12 04 00.5   +08 47 39     4.048    3.458   48.3   12.7   106   13.2 
2025-08-03 00:00 UT   12 05 01.5   +08 39 38     4.058    3.457   47.7   12.5   106   13.2 
2025-08-04 00:00 UT   12 06 02.8   +08 31 35     4.068    3.457   47.0   12.4   106   13.2 
2025-08-05 00:00 UT   12 07 04.4   +08 23 32     4.077    3.456   46.4   12.3   106   13.2 
2025-08-06 00:00 UT   12 08 06.4   +08 15 27     4.087    3.455   45.7   12.1   105   13.2 
2025-08-07 00:00 UT   12 09 08.7   +08 07 21     4.096    3.455   45.0   12.0   105   13.2 
2025-08-08 00:00 UT   12 10 11.3   +07 59 15     4.105    3.454   44.4   11.9   105   13.2 
2025-08-09 00:00 UT   12 11 14.2   +07 51 07     4.114    3.454   43.7   11.7   105   13.2 
2025-08-10 00:00 UT   12 12 17.4   +07 42 59     4.123    3.453   43.1   11.6   105   13.2 
2025-08-11 00:00 UT   12 13 20.9   +07 34 49     4.132    3.453   42.4   11.4   104   13.2 
2025-08-12 00:00 UT   12 14 24.8   +07 26 39     4.141    3.452   41.8   11.3   104   13.2 
2025-08-13 00:00 UT   12 15 28.9   +07 18 28     4.149    3.452   41.2   11.1   104   13.2 
2025-08-14 00:00 UT   12 16 33.4   +07 10 16     4.158    3.451   40.5   11.0   104   13.2 
2025-08-15 00:00 UT   12 17 38.1   +07 02 03     4.166    3.450   39.9   10.8   104   13.2 
2025-08-16 00:00 UT   12 18 43.1   +06 53 50     4.174    3.450   39.2   10.7   103   13.2 
2025-08-17 00:00 UT   12 19 48.4   +06 45 36     4.183    3.449   38.6   10.5   103   13.2 

    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.