(110) Lydia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Jul 2025	11.9	2.528 AU	1.719 AU	22h42m	-17°32'	133.4°	17.0°
Opposition	21 Aug 2025	11.1	2.519 AU	1.517 AU	22h21m	-20°54'	170.0°	4.0°

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 Lydia are:

            e (Eccentricity)                : 0.0792773
            a (Semimajor axis)              : 2.7332330
            i (Inclination)                 : 5.95939
            Ω (Longitude of ascending node) : 56.76763
            ω (Argument of perihelion)      : 282.23393
            M (Mean anomaly)                : 327.84122
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : -20.93398
            B (Latitude of perihelion)      : -5.82358
            P (Orbital period in years)     : 4.52            
        

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
2025-07-12 00:00 UT   22 42 43.8   -17 32 55     1.719    2.528  133.4   17.0   256   11.9 
2025-07-12 05:48 UT   22 42 43.1   -17 33 47     1.717    2.528  133.6   16.9   256   11.9 
2025-07-13 00:00 UT   22 42 40.4   -17 36 31     1.710    2.528  134.4   16.7   256   11.9 
2025-07-14 00:00 UT   22 42 35.3   -17 40 15     1.702    2.528  135.3   16.4   257   11.9 
2025-07-15 00:00 UT   22 42 28.7   -17 44 06     1.693    2.527  136.3   16.1   257   11.9 
2025-07-16 00:00 UT   22 42 20.4   -17 48 05     1.684    2.527  137.3   15.8   257   11.8 
2025-07-17 00:00 UT   22 42 10.5   -17 52 11     1.676    2.527  138.2   15.5   258   11.8 
2025-07-18 00:00 UT   22 41 59.0   -17 56 25     1.668    2.526  139.2   15.2   258   11.8 
2025-07-19 00:00 UT   22 41 45.9   -18 00 45     1.660    2.526  140.2   14.9   259   11.8 
2025-07-20 00:00 UT   22 41 31.1   -18 05 12     1.652    2.526  141.2   14.6   259   11.8 
2025-07-21 00:00 UT   22 41 14.7   -18 09 45     1.645    2.526  142.2   14.3   260   11.7 
2025-07-22 00:00 UT   22 40 56.8   -18 14 25     1.637    2.525  143.2   13.9   260   11.7 
2025-07-23 00:00 UT   22 40 37.2   -18 19 10     1.630    2.525  144.2   13.6   261   11.7 
2025-07-24 00:00 UT   22 40 16.0   -18 24 02     1.623    2.525  145.3   13.3   261   11.7 
2025-07-25 00:00 UT   22 39 53.3   -18 28 58     1.616    2.525  146.3   12.9   262   11.7 
2025-07-26 00:00 UT   22 39 29.0   -18 33 60     1.609    2.524  147.3   12.6   263   11.6 
2025-07-27 00:00 UT   22 39 03.2   -18 39 06     1.603    2.524  148.3   12.2   263   11.6 
2025-07-28 00:00 UT   22 38 35.9   -18 44 16     1.597    2.524  149.3   11.8   264   11.6 
2025-07-29 00:00 UT   22 38 07.1   -18 49 31     1.591    2.524  150.4   11.5   265   11.6 
2025-07-30 00:00 UT   22 37 36.9   -18 54 49     1.585    2.523  151.4   11.1   266   11.5 
2025-07-31 00:00 UT   22 37 05.2   -19 00 10     1.579    2.523  152.4   10.7   267   11.5 
2025-08-01 00:00 UT   22 36 32.2   -19 05 34     1.574    2.523  153.4   10.4   268   11.5 
2025-08-02 00:00 UT   22 35 57.8   -19 11 00     1.569    2.523  154.5   10.0   269   11.5 
2025-08-03 00:00 UT   22 35 22.0   -19 16 28     1.564    2.523  155.5    9.6   270   11.5 
2025-08-04 00:00 UT   22 34 45.0   -19 21 58     1.559    2.522  156.5    9.2   271   11.4 
2025-08-05 00:00 UT   22 34 06.7   -19 27 29     1.555    2.522  157.5    8.9   272   11.4 
2025-08-06 00:00 UT   22 33 27.2   -19 33 00     1.551    2.522  158.5    8.5   274   11.4 
2025-08-07 00:00 UT   22 32 46.5   -19 38 32     1.547    2.522  159.5    8.1   275   11.4 
2025-08-08 00:00 UT   22 32 04.7   -19 44 04     1.543    2.522  160.5    7.7   277   11.3 
2025-08-09 00:00 UT   22 31 21.8   -19 49 35     1.540    2.521  161.5    7.3   279   11.3 
2025-08-10 00:00 UT   22 30 37.9   -19 55 05     1.536    2.521  162.4    7.0   281   11.3 
2025-08-11 00:00 UT   22 29 53.0   -20 00 34     1.533    2.521  163.4    6.6   284   11.3 

    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.