(110) Lydia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Dec 2025	13.0	2.528 AU	2.669 AU	22h46m	-12°56'	71.1°	21.6°
Opposition	16 Dec 2026	11.5	2.774 AU	1.792 AU	05h35m	+27°37'	175.7°	1.5°

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)                : 0.0791000
            a (Semimajor axis)              : 2.7327035
            i (Inclination)                 : 5.95940
            Ω (Longitude of ascending node) : 56.76338
            ω (Argument of perihelion)      : 282.24106
            M (Mean anomaly)                : 11.46473
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -20.93107
            B (Latitude of perihelion)      : -5.82343
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-12-19 00:00 UT   22 46 04.1   -12 56 43     2.669    2.528   71.1   21.6    69   13.0 
2025-12-19 04:52 UT   22 46 19.6   -12 54 43     2.671    2.528   71.0   21.6    69   13.0 
2025-12-20 00:00 UT   22 47 20.7   -12 46 47     2.681    2.529   70.5   21.5    69   13.0 
2025-12-21 00:00 UT   22 48 37.8   -12 36 48     2.694    2.529   69.8   21.4    69   13.0 
2025-12-22 00:00 UT   22 49 55.4   -12 26 46     2.706    2.529   69.2   21.3    69   13.0 
2025-12-23 00:00 UT   22 51 13.5   -12 16 41     2.719    2.530   68.5   21.2    69   13.1 
2025-12-24 00:00 UT   22 52 32.1   -12 06 32     2.731    2.530   67.8   21.1    69   13.1 
2025-12-25 00:00 UT   22 53 51.2   -11 56 21     2.743    2.530   67.2   21.0    69   13.1 
2025-12-26 00:00 UT   22 55 10.7   -11 46 07     2.756    2.531   66.5   20.9    69   13.1 
2025-12-27 00:00 UT   22 56 30.7   -11 35 50     2.768    2.531   65.9   20.8    69   13.1 
2025-12-28 00:00 UT   22 57 51.1   -11 25 30     2.780    2.531   65.2   20.7    69   13.1 
2025-12-29 00:00 UT   22 59 11.9   -11 15 07     2.792    2.531   64.6   20.5    69   13.1 
2025-12-30 00:00 UT   23 00 33.2   -11 04 42     2.804    2.532   64.0   20.4    69   13.1 
2025-12-31 00:00 UT   23 01 54.9   -10 54 14     2.816    2.532   63.3   20.3    69   13.1 
2026-01-01 00:00 UT   23 03 17.0   -10 43 44     2.828    2.532   62.7   20.2    69   13.1 
2026-01-02 00:00 UT   23 04 39.4   -10 33 11     2.840    2.533   62.0   20.1    69   13.1 
2026-01-03 00:00 UT   23 06 02.3   -10 22 36     2.852    2.533   61.4   19.9    70   13.1 
2026-01-04 00:00 UT   23 07 25.5   -10 11 58     2.864    2.533   60.8   19.8    70   13.1 
2026-01-05 00:00 UT   23 08 49.1   -10 01 18     2.876    2.534   60.1   19.7    70   13.1 
2026-01-06 00:00 UT   23 10 13.0   -09 50 35     2.887    2.534   59.5   19.5    70   13.1 
2026-01-07 00:00 UT   23 11 37.3   -09 39 51     2.899    2.535   58.9   19.4    70   13.1 
2026-01-08 00:00 UT   23 13 01.9   -09 29 04     2.910    2.535   58.3   19.3    70   13.1 
2026-01-09 00:00 UT   23 14 26.9   -09 18 14     2.922    2.535   57.6   19.1    70   13.1 
2026-01-10 00:00 UT   23 15 52.2   -09 07 23     2.933    2.536   57.0   19.0    70   13.2 

    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.