(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 May 2025	12.7	3.495 AU	2.970 AU	11h12m	+17°29'	113.4°	15.4°
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)                : 0.1049890
            a (Semimajor axis)              : 3.1848901
            i (Inclination)                 : 9.92326
            Ω (Longitude of ascending node) : 101.39359
            ω (Argument of perihelion)      : 236.76974
            M (Mean anomaly)                : 203.39112
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 157.76626
            B (Latitude of perihelion)      : -8.28800
            P (Orbital period in years)     : 5.68            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-05-09 00:00 UT   11 12 10.2   +17 29 30     2.970    3.495  113.4   15.4   118   12.7 
2025-05-09 07:51 UT   11 12 10.6   +17 28 32     2.974    3.495  113.1   15.4   118   12.7 
2025-05-10 00:00 UT   11 12 11.8   +17 26 31     2.983    3.495  112.4   15.5   118   12.7 
2025-05-11 00:00 UT   11 12 14.5   +17 23 25     2.995    3.495  111.5   15.6   118   12.7 
2025-05-12 00:00 UT   11 12 18.3   +17 20 13     3.008    3.494  110.6   15.7   118   12.7 
2025-05-13 00:00 UT   11 12 23.2   +17 16 53     3.021    3.494  109.7   15.8   117   12.7 
2025-05-14 00:00 UT   11 12 29.2   +17 13 27     3.034    3.494  108.8   15.9   117   12.7 
2025-05-15 00:00 UT   11 12 36.2   +17 09 55     3.047    3.493  107.9   16.0   117   12.7 
2025-05-16 00:00 UT   11 12 44.2   +17 06 16     3.060    3.493  107.0   16.1   117   12.8 
2025-05-17 00:00 UT   11 12 53.3   +17 02 31     3.073    3.492  106.2   16.1   117   12.8 
2025-05-18 00:00 UT   11 13 03.5   +16 58 40     3.087    3.492  105.3   16.2   116   12.8 
2025-05-19 00:00 UT   11 13 14.7   +16 54 42     3.100    3.492  104.4   16.3   116   12.8 
2025-05-20 00:00 UT   11 13 26.9   +16 50 39     3.113    3.491  103.5   16.4   116   12.8 
2025-05-21 00:00 UT   11 13 40.1   +16 46 30     3.127    3.491  102.7   16.4   116   12.8 
2025-05-22 00:00 UT   11 13 54.4   +16 42 15     3.140    3.491  101.8   16.5   116   12.8 
2025-05-23 00:00 UT   11 14 09.6   +16 37 54     3.153    3.490  100.9   16.5   115   12.8 
2025-05-24 00:00 UT   11 14 25.8   +16 33 27     3.167    3.490  100.1   16.6   115   12.8 
2025-05-25 00:00 UT   11 14 43.0   +16 28 55     3.181    3.489   99.2   16.6   115   12.9 
2025-05-26 00:00 UT   11 15 01.2   +16 24 18     3.194    3.489   98.4   16.7   115   12.9 
2025-05-27 00:00 UT   11 15 20.3   +16 19 35     3.208    3.489   97.6   16.7   115   12.9 
2025-05-28 00:00 UT   11 15 40.4   +16 14 47     3.221    3.488   96.7   16.8   115   12.9 
2025-05-29 00:00 UT   11 16 01.5   +16 09 54     3.235    3.488   95.9   16.8   114   12.9 
2025-05-30 00:00 UT   11 16 23.5   +16 04 56     3.249    3.488   95.1   16.8   114   12.9 
2025-05-31 00:00 UT   11 16 46.4   +15 59 52     3.263    3.487   94.2   16.9   114   12.9 
2025-06-01 00:00 UT   11 17 10.2   +15 54 44     3.276    3.487   93.4   16.9   114   12.9 
2025-06-02 00:00 UT   11 17 34.9   +15 49 31     3.290    3.486   92.6   16.9   114   12.9 
2025-06-03 00:00 UT   11 18 00.5   +15 44 14     3.304    3.486   91.8   16.9   114   12.9 
2025-06-04 00:00 UT   11 18 26.9   +15 38 52     3.318    3.486   91.0   16.9   114   13.0 
2025-06-05 00:00 UT   11 18 54.2   +15 33 25     3.331    3.485   90.2   16.9   113   13.0 
2025-06-06 00:00 UT   11 19 22.4   +15 27 54     3.345    3.485   89.4   16.9   113   13.0 
2025-06-07 00:00 UT   11 19 51.4   +15 22 19     3.359    3.484   88.6   16.9   113   13.0 
2025-06-08 00:00 UT   11 20 21.2   +15 16 39     3.373    3.484   87.8   16.9   113   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.