2010 PY4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Jul 2026	25.1	3.325 AU	3.878 AU	10h28m	-00°38'	50.5°	13.6°
Opposition	9 May 2027	22.3	2.518 AU	1.559 AU	14h30m	-39°33'	156.6°	9.2°

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 2010 PY4 are:

            e (Eccentricity)                : 0.3065209
            a (Semimajor axis)              : 2.7057960
            i (Inclination)                 : 14.62765
            Ω (Longitude of ascending node) : 304.48742
            ω (Argument of perihelion)      : 18.33592
            M (Mean anomaly)                : 181.83099
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 322.26701
            B (Latitude of perihelion)      : 4.55665
            P (Orbital period in years)     : 4.45            
        

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
2026-07-12 00:00 UT   10 28 49.5   +00 38 27     3.878    3.325   50.5   13.6   120   25.1 
2026-07-12 08:13 UT   10 29 10.3   +00 40 22     3.881    3.324   50.3   13.6   120   25.1 
2026-07-13 00:00 UT   10 29 50.4   +00 44 04     3.887    3.323   49.8   13.5   120   25.1 
2026-07-14 00:00 UT   10 30 51.6   +00 49 46     3.896    3.321   49.2   13.4   120   25.1 
2026-07-15 00:00 UT   10 31 53.2   +00 55 31     3.905    3.319   48.5   13.3   120   25.1 
2026-07-16 00:00 UT   10 32 55.2   -01 01 20     3.913    3.318   47.8   13.1   121   25.1 
2026-07-17 00:00 UT   10 33 57.6   -01 07 13     3.922    3.316   47.2   13.0   121   25.1 
2026-07-18 00:00 UT   10 35 00.2   -01 13 11     3.930    3.314   46.5   12.9   121   25.1 
2026-07-19 00:00 UT   10 36 03.3   -01 19 11     3.939    3.312   45.9   12.7   121   25.1 
2026-07-20 00:00 UT   10 37 06.6   -01 25 16     3.947    3.311   45.2   12.6   122   25.1 
2026-07-21 00:00 UT   10 38 10.3   -01 31 25     3.955    3.309   44.6   12.4   122   25.1 
2026-07-22 00:00 UT   10 39 14.3   -01 37 37     3.963    3.307   43.9   12.3   122   25.1 
2026-07-23 00:00 UT   10 40 18.6   -01 43 53     3.971    3.305   43.3   12.2   122   25.1 
2026-07-24 00:00 UT   10 41 23.3   -01 50 13     3.978    3.303   42.6   12.0   123   25.0 
2026-07-25 00:00 UT   10 42 28.2   -01 56 36     3.986    3.302   42.0   11.9   123   25.0 
2026-07-26 00:00 UT   10 43 33.5   -02 03 03     3.993    3.300   41.4   11.7   123   25.0 
2026-07-27 00:00 UT   10 44 39.0   -02 09 34     4.000    3.298   40.7   11.6   123   25.0 
2026-07-28 00:00 UT   10 45 44.8   -02 16 08     4.007    3.296   40.1   11.4   124   25.0 
2026-07-29 00:00 UT   10 46 50.9   -02 22 46     4.014    3.294   39.4   11.3   124   25.0 
2026-07-30 00:00 UT   10 47 57.3   -02 29 27     4.021    3.292   38.8   11.1   124   25.0 
2026-07-31 00:00 UT   10 49 04.0   -02 36 11     4.028    3.290   38.2   11.0   125   25.0 
2026-08-01 00:00 UT   10 50 11.0   -02 42 60     4.034    3.289   37.6   10.8   125   25.0 
2026-08-02 00:00 UT   10 51 18.2   -02 49 51     4.041    3.287   36.9   10.7   125   25.0 
2026-08-03 00:00 UT   10 52 25.7   -02 56 46     4.047    3.285   36.3   10.5   126   25.0 
2026-08-04 00:00 UT   10 53 33.4   -03 03 44     4.053    3.283   35.7   10.4   126   25.0 
2026-08-05 00:00 UT   10 54 41.5   -03 10 46     4.059    3.281   35.1   10.2   126   25.0 
2026-08-06 00:00 UT   10 55 49.7   -03 17 51     4.065    3.279   34.4   10.1   127   25.0 
2026-08-07 00:00 UT   10 56 58.3   -03 24 59     4.071    3.277   33.8    9.9   127   25.0 
2026-08-08 00:00 UT   10 58 07.1   -03 32 10     4.076    3.275   33.2    9.8   127   25.0 
2026-08-09 00:00 UT   10 59 16.1   -03 39 25     4.082    3.273   32.6    9.6   128   25.0 
2026-08-10 00:00 UT   11 00 25.4   -03 46 43     4.087    3.271   32.0    9.4   128   25.0 

    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.