(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	16 May 2026	11.4	3.227 AU	2.228 AU	15h42m	-08°58'	169.6°	3.2°
Today	18 May 2026	11.4	3.226 AU	2.226 AU	15h41m	-08°57'	169.5°	3.3°

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) : 101.39207
            ω (Argument of perihelion)      : 236.68467
            M (Mean anomaly)                : 238.16042
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 157.67916
            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
2026-05-18 00:00 UT   15 41 08.3   -08 57 08     2.226    3.226  169.5    3.3   184   11.4 
2026-05-18 08:21 UT   15 40 51.6   -08 56 46     2.226    3.226  169.4    3.3   182   11.4 
2026-05-19 00:00 UT   15 40 20.3   -08 56 08     2.225    3.225  169.3    3.3   178   11.4 
2026-05-20 00:00 UT   15 39 32.3   -08 55 12     2.225    3.224  169.0    3.4   172   11.4 
2026-05-21 00:00 UT   15 38 44.3   -08 54 21     2.225    3.223  168.5    3.6   167   11.4 
2026-05-22 00:00 UT   15 37 56.4   -08 53 35     2.225    3.222  168.0    3.7   162   11.4 
2026-05-23 00:00 UT   15 37 08.7   -08 52 53     2.225    3.221  167.4    3.9   157   11.4 
2026-05-24 00:00 UT   15 36 21.1   -08 52 17     2.226    3.220  166.7    4.1   153   11.4 
2026-05-25 00:00 UT   15 35 33.7   -08 51 45     2.227    3.219  166.0    4.4   150   11.4 
2026-05-26 00:00 UT   15 34 46.7   -08 51 19     2.228    3.218  165.2    4.6   146   11.4 
2026-05-27 00:00 UT   15 33 59.9   -08 50 58     2.230    3.217  164.4    4.9   143   11.4 
2026-05-28 00:00 UT   15 33 13.5   -08 50 41     2.232    3.216  163.5    5.1   141   11.5 
2026-05-29 00:00 UT   15 32 27.5   -08 50 31     2.234    3.215  162.6    5.4   138   11.5 
2026-05-30 00:00 UT   15 31 41.9   -08 50 25     2.236    3.214  161.7    5.7   136   11.5 
2026-05-31 00:00 UT   15 30 56.9   -08 50 25     2.239    3.213  160.7    6.0   134   11.5 
2026-06-01 00:00 UT   15 30 12.3   -08 50 31     2.241    3.212  159.8    6.3   132   11.5 
2026-06-02 00:00 UT   15 29 28.3   -08 50 42     2.244    3.211  158.8    6.6   131   11.5 
2026-06-03 00:00 UT   15 28 44.9   -08 50 59     2.248    3.210  157.8    6.8   129   11.6 
2026-06-04 00:00 UT   15 28 02.1   -08 51 21     2.252    3.209  156.8    7.1   128   11.6 
2026-06-05 00:00 UT   15 27 20.0   -08 51 50     2.255    3.208  155.8    7.4   127   11.6 
2026-06-06 00:00 UT   15 26 38.6   -08 52 24     2.260    3.207  154.8    7.7   126   11.6 
2026-06-07 00:00 UT   15 25 57.9   -08 53 04     2.264    3.206  153.8    8.0   125   11.6 
2026-06-08 00:00 UT   15 25 18.0   -08 53 49     2.269    3.205  152.8    8.3   124   11.6 
2026-06-09 00:00 UT   15 24 38.9   -08 54 41     2.274    3.204  151.8    8.6   123   11.7 
2026-06-10 00:00 UT   15 24 00.6   -08 55 38     2.279    3.203  150.7    8.9   122   11.7 
2026-06-11 00:00 UT   15 23 23.2   -08 56 42     2.284    3.202  149.7    9.2   121   11.7 
2026-06-12 00:00 UT   15 22 46.7   -08 57 51     2.290    3.201  148.7    9.5   120   11.7 
2026-06-13 00:00 UT   15 22 11.2   -08 59 07     2.295    3.200  147.7    9.8   120   11.7 
2026-06-14 00:00 UT   15 21 36.6   -09 00 29     2.302    3.199  146.6   10.1   119   11.7 
2026-06-15 00:00 UT   15 21 03.0   -09 01 56     2.308    3.198  145.6   10.3   118   11.8 
2026-06-16 00:00 UT   15 20 30.4   -09 03 30     2.314    3.197  144.6   10.6   118   11.8 
2026-06-17 00:00 UT   15 19 58.8   -09 05 09     2.321    3.196  143.6   10.9   117   11.8 

    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.