(92) Undina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	9 Mar 2025	11.8	3.512 AU	2.536 AU	11h40m	+16°04'	167.2°	3.6°
Today	21 Mar 2025	11.9	3.509 AU	2.551 AU	11h31m	+17°01'	161.4°	5.2°

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
2025-03-21 00:00 UT   11 31 54.5   +17 01 15     2.551    3.509  161.4    5.2   157   11.9 
2025-03-21 10:56 UT   11 31 35.1   +17 03 11     2.552    3.509  161.0    5.3   155   11.9 
2025-03-22 00:00 UT   11 31 12.0   +17 05 28     2.554    3.509  160.6    5.4   154   11.9 
2025-03-23 00:00 UT   11 30 29.7   +17 09 32     2.557    3.509  159.7    5.7   152   12.0 
2025-03-24 00:00 UT   11 29 47.8   +17 13 29     2.561    3.508  158.8    5.9   150   12.0 
2025-03-25 00:00 UT   11 29 06.3   +17 17 17     2.564    3.508  157.8    6.2   148   12.0 
2025-03-26 00:00 UT   11 28 25.2   +17 20 56     2.569    3.508  156.9    6.4   146   12.0 
2025-03-27 00:00 UT   11 27 44.6   +17 24 26     2.573    3.508  155.9    6.7   144   12.0 
2025-03-28 00:00 UT   11 27 04.4   +17 27 47     2.578    3.508  154.9    6.9   143   12.0 
2025-03-29 00:00 UT   11 26 24.8   +17 30 60     2.583    3.507  154.0    7.2   141   12.1 
2025-03-30 00:00 UT   11 25 45.8   +17 34 03     2.588    3.507  153.0    7.4   140   12.1 
2025-03-31 00:00 UT   11 25 07.4   +17 36 57     2.594    3.507  152.0    7.7   139   12.1 
2025-04-01 00:00 UT   11 24 29.7   +17 39 41     2.599    3.507  150.9    8.0   138   12.1 
2025-04-02 00:00 UT   11 23 52.6   +17 42 16     2.605    3.506  149.9    8.2   137   12.1 
2025-04-03 00:00 UT   11 23 16.3   +17 44 41     2.612    3.506  148.9    8.5   136   12.1 
2025-04-04 00:00 UT   11 22 40.7   +17 46 57     2.618    3.506  147.9    8.7   135   12.1 
2025-04-05 00:00 UT   11 22 05.9   +17 49 03     2.625    3.506  146.9    9.0   134   12.2 
2025-04-06 00:00 UT   11 21 31.9   +17 50 59     2.632    3.505  145.8    9.2   133   12.2 
2025-04-07 00:00 UT   11 20 58.7   +17 52 46     2.639    3.505  144.8    9.5   132   12.2 
2025-04-08 00:00 UT   11 20 26.3   +17 54 23     2.647    3.505  143.8    9.7   131   12.2 
2025-04-09 00:00 UT   11 19 54.9   +17 55 51     2.654    3.504  142.8   10.0   131   12.2 
2025-04-10 00:00 UT   11 19 24.3   +17 57 09     2.662    3.504  141.7   10.2   130   12.2 
2025-04-11 00:00 UT   11 18 54.7   +17 58 17     2.670    3.504  140.7   10.4   129   12.3 
2025-04-12 00:00 UT   11 18 25.9   +17 59 16     2.679    3.504  139.7   10.7   129   12.3 
2025-04-13 00:00 UT   11 17 58.2   +18 00 05     2.687    3.503  138.7   10.9   128   12.3 
2025-04-14 00:00 UT   11 17 31.4   +18 00 45     2.696    3.503  137.6   11.1   127   12.3 
2025-04-15 00:00 UT   11 17 05.6   +18 01 16     2.705    3.503  136.6   11.3   127   12.3 
2025-04-16 00:00 UT   11 16 40.8   +18 01 37     2.714    3.503  135.6   11.6   126   12.3 
2025-04-17 00:00 UT   11 16 17.0   +18 01 48     2.724    3.502  134.6   11.8   126   12.4 
2025-04-18 00:00 UT   11 15 54.3   +18 01 51     2.733    3.502  133.6   12.0   125   12.4 
2025-04-19 00:00 UT   11 15 32.6   +18 01 44     2.743    3.502  132.6   12.2   125   12.4 
2025-04-20 00:00 UT   11 15 12.0   +18 01 29     2.753    3.501  131.6   12.4   125   12.4 

    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.