(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Oct 2025	12.9	3.405 AU	4.380 AU	13h42m	-02°33'	10.1°	2.9°
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
2025-10-25 00:00 UT   13 42 51.8   -02 33 43     4.380    3.405   10.1    2.9   339   12.9 
2025-10-25 14:47 UT   13 43 38.9   -02 38 19     4.378    3.404   10.3    3.0   338   12.9 
2025-10-26 00:00 UT   13 44 08.3   -02 41 10     4.377    3.404   10.5    3.1   337   12.9 
2025-10-27 00:00 UT   13 45 24.8   -02 48 35     4.374    3.403   11.0    3.2   334   12.9 
2025-10-28 00:00 UT   13 46 41.4   -02 55 58     4.371    3.403   11.5    3.3   332   12.9 
2025-10-29 00:00 UT   13 47 58.1   -03 03 19     4.368    3.402   12.0    3.5   330   12.9 
2025-10-30 00:00 UT   13 49 14.7   -03 10 37     4.364    3.401   12.5    3.6   328   12.9 
2025-10-31 00:00 UT   13 50 31.4   -03 17 53     4.361    3.401   13.0    3.8   326   12.9 
2025-11-01 00:00 UT   13 51 48.1   -03 25 08     4.357    3.400   13.5    3.9   324   12.9 
2025-11-02 00:00 UT   13 53 04.9   -03 32 19     4.353    3.399   14.1    4.1   323   12.9 
2025-11-03 00:00 UT   13 54 21.7   -03 39 29     4.349    3.398   14.6    4.2   321   12.9 
2025-11-04 00:00 UT   13 55 38.4   -03 46 36     4.345    3.398   15.2    4.4   320   12.9 
2025-11-05 00:00 UT   13 56 55.2   -03 53 41     4.340    3.397   15.8    4.6   318   12.9 
2025-11-06 00:00 UT   13 58 12.0   -04 00 43     4.336    3.396   16.4    4.7   317   13.0 
2025-11-07 00:00 UT   13 59 28.9   -04 07 43     4.331    3.395   17.0    4.9   316   13.0 
2025-11-08 00:00 UT   14 00 45.7   -04 14 41     4.326    3.395   17.5    5.0   315   13.0 
2025-11-09 00:00 UT   14 02 02.5   -04 21 36     4.321    3.394   18.1    5.2   314   13.0 
2025-11-10 00:00 UT   14 03 19.3   -04 28 29     4.316    3.393   18.7    5.4   313   13.0 
2025-11-11 00:00 UT   14 04 36.1   -04 35 19     4.311    3.392   19.4    5.6   312   13.0 
2025-11-12 00:00 UT   14 05 53.0   -04 42 06     4.305    3.392   20.0    5.7   311   13.0 
2025-11-13 00:00 UT   14 07 09.7   -04 48 51     4.300    3.391   20.6    5.9   311   13.0 
2025-11-14 00:00 UT   14 08 26.5   -04 55 33     4.294    3.390   21.2    6.1   310   13.0 
2025-11-15 00:00 UT   14 09 43.3   -05 02 12     4.288    3.389   21.8    6.2   309   13.0 
2025-11-16 00:00 UT   14 11 00.0   -05 08 49     4.282    3.389   22.5    6.4   309   13.0 
2025-11-17 00:00 UT   14 12 16.7   -05 15 23     4.275    3.388   23.1    6.6   308   13.0 
2025-11-18 00:00 UT   14 13 33.4   -05 21 54     4.269    3.387   23.7    6.7   307   13.0 
2025-11-19 00:00 UT   14 14 50.0   -05 28 22     4.262    3.386   24.4    6.9   307   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.