(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Nov 2025	12.9	3.397 AU	4.340 AU	13h56m	-03°53'	15.8°	4.6°
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
2025-11-05 00:00 UT   13 56 55.2   -03 53 41     4.340    3.397   15.8    4.6   318   12.9 
2025-11-05 04:42 UT   13 57 10.3   -03 55 04     4.339    3.397   15.9    4.6   318   13.0 
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 
2025-11-20 00:00 UT   14 16 06.6   -05 34 47     4.256    3.386   25.0    7.1   306   13.0 
2025-11-21 00:00 UT   14 17 23.1   -05 41 09     4.249    3.385   25.6    7.3   306   13.0 
2025-11-22 00:00 UT   14 18 39.5   -05 47 29     4.242    3.384   26.3    7.4   305   13.0 
2025-11-23 00:00 UT   14 19 55.9   -05 53 45     4.234    3.383   26.9    7.6   304   13.0 
2025-11-24 00:00 UT   14 21 12.2   -05 59 58     4.227    3.383   27.6    7.8   304   13.0 
2025-11-25 00:00 UT   14 22 28.4   -06 06 08     4.219    3.382   28.2    7.9   303   13.0 
2025-11-26 00:00 UT   14 23 44.6   -06 12 14     4.212    3.381   28.9    8.1   303   13.0 
2025-11-27 00:00 UT   14 25 00.7   -06 18 18     4.204    3.380   29.5    8.3   303   13.0 
2025-11-28 00:00 UT   14 26 16.6   -06 24 19     4.196    3.380   30.2    8.4   302   13.1 
2025-11-29 00:00 UT   14 27 32.5   -06 30 16     4.188    3.379   30.8    8.6   302   13.1 
2025-11-30 00:00 UT   14 28 48.3   -06 36 10     4.179    3.378   31.5    8.8   301   13.1 

    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.