(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Apr 2026	11.8	3.253 AU	2.358 AU	16h00m	-09°45'	147.9°	9.4°
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) : 101.39207
            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
2026-04-20 00:00 UT   16 00 30.3   -09 45 36     2.358    3.253  147.9    9.4   264   11.8 
2026-04-20 01:30 UT   16 00 28.4   -09 45 28     2.358    3.253  148.0    9.4   264   11.8 
2026-04-21 00:00 UT   15 59 59.6   -09 43 29     2.350    3.252  148.9    9.2   264   11.8 
2026-04-22 00:00 UT   15 59 27.8   -09 41 23     2.342    3.251  150.0    8.9   263   11.8 
2026-04-23 00:00 UT   15 58 55.0   -09 39 18     2.334    3.250  151.0    8.6   262   11.7 
2026-04-24 00:00 UT   15 58 21.2   -09 37 13     2.327    3.249  152.0    8.3   261   11.7 
2026-04-25 00:00 UT   15 57 46.3   -09 35 09     2.320    3.248  153.1    8.1   260   11.7 
2026-04-26 00:00 UT   15 57 10.6   -09 33 07     2.313    3.247  154.1    7.8   259   11.7 
2026-04-27 00:00 UT   15 56 33.8   -09 31 05     2.306    3.247  155.1    7.5   258   11.7 
2026-04-28 00:00 UT   15 55 56.2   -09 29 05     2.299    3.246  156.1    7.2   257   11.6 
2026-04-29 00:00 UT   15 55 17.7   -09 27 06     2.293    3.245  157.1    6.9   256   11.6 
2026-04-30 00:00 UT   15 54 38.4   -09 25 08     2.287    3.244  158.1    6.6   254   11.6 
2026-05-01 00:00 UT   15 53 58.2   -09 23 13     2.282    3.243  159.1    6.4   253   11.6 
2026-05-02 00:00 UT   15 53 17.3   -09 21 19     2.276    3.242  160.1    6.1   251   11.6 
2026-05-03 00:00 UT   15 52 35.7   -09 19 27     2.271    3.241  161.0    5.8   249   11.5 
2026-05-04 00:00 UT   15 51 53.3   -09 17 37     2.266    3.240  162.0    5.5   247   11.5 
2026-05-05 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   11.4 
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   11.3 
2026-05-17 00:00 UT   15 41 56.3   -08 58 12     2.227    3.227  169.6    3.2   191   11.3 
2026-05-18 00:00 UT   15 41 08.3   -08 57 08     2.226    3.226  169.5    3.3   184   11.3 
2026-05-19 00:00 UT   15 40 20.3   -08 56 08     2.225    3.225  169.3    3.3   178   11.3 
2026-05-20 00:00 UT   15 39 32.3   -08 55 12     2.225    3.224  169.0    3.4   172   11.4 

    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.