(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	4 May 2026	11.5	3.240 AU	2.266 AU	15h51m	-09°17'	162.0°	5.5°
Opposition	16 May 2026	11.4	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) : 101.39207
            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
2026-05-04 00:00 UT   15 51 53.3   -09 17 37     2.266    3.240  162.0    5.5   247   11.5 
2026-05-04 02:14 UT   15 51 49.3   -09 17 27     2.266    3.240  162.1    5.5   247   11.5 
2026-05-05 00:00 UT   15 51 10.3   -09 15 50     2.261    3.239  162.9    5.3   245   11.5 
2026-05-06 00:00 UT   15 50 26.6   -09 14 05     2.257    3.238  163.8    5.0   242   11.5 
2026-05-07 00:00 UT   15 49 42.3   -09 12 22     2.253    3.237  164.6    4.7   240   11.5 
2026-05-08 00:00 UT   15 48 57.5   -09 10 43     2.249    3.236  165.5    4.5   237   11.5 
2026-05-09 00:00 UT   15 48 12.2   -09 09 06     2.245    3.235  166.2    4.3   233   11.4 
2026-05-10 00:00 UT   15 47 26.4   -09 07 32     2.242    3.234  167.0    4.0   229   11.4 
2026-05-11 00:00 UT   15 46 40.2   -09 06 01     2.239    3.233  167.6    3.8   225   11.4 
2026-05-12 00:00 UT   15 45 53.6   -09 04 34     2.236    3.232  168.2    3.7   220   11.4 
2026-05-13 00:00 UT   15 45 06.6   -09 03 10     2.234    3.231  168.7    3.5   215   11.4 
2026-05-14 00:00 UT   15 44 19.4   -09 01 50     2.232    3.230  169.1    3.4   209   11.4 
2026-05-15 00:00 UT   15 43 31.9   -09 00 33     2.230    3.229  169.4    3.3   203   11.4 
2026-05-16 00:00 UT   15 42 44.1   -08 59 21     2.228    3.228  169.5    3.3   197   11.4 
2026-05-17 00:00 UT   15 41 56.3   -08 58 12     2.227    3.227  169.6    3.2   191   11.4 
2026-05-18 00:00 UT   15 41 08.3   -08 57 08     2.226    3.226  169.5    3.3   184   11.4 
2026-05-19 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 

    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.