2010 PY4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	23 Feb 2026	23.8	3.497 AU	2.519 AU	10h11m	-00°00'	169.6°	2.9°
Today	16 Mar 2026	24.0	3.480 AU	2.563 AU	09h54m	+01°02'	153.2°	7.4°

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
2026-03-16 00:00 UT   09 54 36.5   +01 02 10     2.563    3.480  153.2    7.4    88   24.0 
2026-03-16 02:57 UT   09 54 31.1   +01 02 34     2.564    3.480  153.1    7.4    88   24.0 
2026-03-17 00:00 UT   09 53 53.3   +01 05 26     2.569    3.479  152.1    7.7    89   24.0 
2026-03-18 00:00 UT   09 53 11.0   +01 08 40     2.574    3.478  151.0    8.0    90   24.1 
2026-03-19 00:00 UT   09 52 29.7   +01 11 54     2.580    3.477  149.9    8.2    91   24.1 
2026-03-20 00:00 UT   09 51 49.3   +01 15 07     2.586    3.476  148.8    8.5    91   24.1 
2026-03-21 00:00 UT   09 51 10.0   +01 18 19     2.592    3.476  147.7    8.8    92   24.1 
2026-03-22 00:00 UT   09 50 31.7   +01 21 29     2.599    3.475  146.7    9.1    93   24.1 
2026-03-23 00:00 UT   09 49 54.4   +01 24 37     2.606    3.474  145.6    9.3    93   24.1 
2026-03-24 00:00 UT   09 49 18.1   +01 27 44     2.613    3.473  144.5    9.6    94   24.1 
2026-03-25 00:00 UT   09 48 43.0   +01 30 48     2.620    3.472  143.4    9.9    95   24.2 
2026-03-26 00:00 UT   09 48 09.0   +01 33 50     2.628    3.471  142.3   10.1    95   24.2 
2026-03-27 00:00 UT   09 47 36.1   +01 36 50     2.635    3.470  141.2   10.4    96   24.2 
2026-03-28 00:00 UT   09 47 04.3   +01 39 47     2.643    3.469  140.1   10.6    96   24.2 
2026-03-29 00:00 UT   09 46 33.7   +01 42 42     2.652    3.468  139.1   10.9    97   24.2 
2026-03-30 00:00 UT   09 46 04.3   +01 45 33     2.660    3.467  138.0   11.1    97   24.2 
2026-03-31 00:00 UT   09 45 36.0   +01 48 22     2.669    3.466  136.9   11.4    98   24.3 
2026-04-01 00:00 UT   09 45 09.0   +01 51 07     2.677    3.465  135.9   11.6    98   24.3 
2026-04-02 00:00 UT   09 44 43.1   +01 53 49     2.686    3.464  134.8   11.8    99   24.3 
2026-04-03 00:00 UT   09 44 18.4   +01 56 28     2.696    3.463  133.7   12.0    99   24.3 
2026-04-04 00:00 UT   09 43 55.0   +01 59 03     2.705    3.462  132.7   12.3    99   24.3 
2026-04-05 00:00 UT   09 43 32.7   +02 01 34     2.715    3.461  131.6   12.5   100   24.3 
2026-04-06 00:00 UT   09 43 11.7   +02 04 02     2.724    3.460  130.6   12.7   100   24.4 
2026-04-07 00:00 UT   09 42 51.9   +02 06 26     2.734    3.459  129.5   12.9   100   24.4 
2026-04-08 00:00 UT   09 42 33.3   +02 08 45     2.744    3.458  128.5   13.1   101   24.4 
2026-04-09 00:00 UT   09 42 16.0   +02 11 01     2.755    3.457  127.5   13.3   101   24.4 
2026-04-10 00:00 UT   09 41 59.9   +02 13 12     2.765    3.455  126.4   13.5   101   24.4 
2026-04-11 00:00 UT   09 41 45.1   +02 15 19     2.776    3.454  125.4   13.7   102   24.4 
2026-04-12 00:00 UT   09 41 31.5   +02 17 22     2.787    3.453  124.4   13.9   102   24.4 
2026-04-13 00:00 UT   09 41 19.2   +02 19 20     2.797    3.452  123.4   14.0   102   24.5 
2026-04-14 00:00 UT   09 41 08.1   +02 21 13     2.808    3.451  122.4   14.2   102   24.5 
2026-04-15 00:00 UT   09 40 58.2   +02 23 02     2.820    3.450  121.4   14.4   103   24.5 

    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.