2001 YD1
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Feb 2026	27.5	2.092 AU	1.270 AU	13h03m	+05°52'	135.4°	19.4°

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 2001 YD1 are:

            e (Eccentricity)                : 0.4647925
            a (Semimajor axis)              : 1.4885039
            i (Inclination)                 : 7.04712
            Ω (Longitude of ascending node) : 85.69290
            ω (Argument of perihelion)      : 285.47897
            M (Mean anomaly)                : 89.47045
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 11.28398
            B (Latitude of perihelion)      : -6.79028
            P (Orbital period in years)     : 1.82            
        

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
2026-02-18 00:00 UT   13 03 25.9   +05 52 16     1.270    2.092  135.4   19.4   281   27.5 
2026-02-18 12:14 UT   13 03 04.5   +05 57 08     1.266    2.093  136.0   19.1   281   27.5 
2026-02-19 00:00 UT   13 02 43.3   +06 01 52     1.263    2.095  136.6   18.9   280   27.5 
2026-02-20 00:00 UT   13 01 58.2   +06 11 38     1.257    2.097  137.8   18.5   280   27.5 
2026-02-21 00:00 UT   13 01 10.6   +06 21 36     1.250    2.099  139.0   18.0   279   27.4 
2026-02-22 00:00 UT   13 00 20.6   +06 31 44     1.244    2.101  140.1   17.6   278   27.4 
2026-02-23 00:00 UT   12 59 28.1   +06 42 02     1.238    2.103  141.3   17.1   278   27.4 
2026-02-24 00:00 UT   12 58 33.2   +06 52 30     1.232    2.105  142.5   16.6   277   27.4 
2026-02-25 00:00 UT   12 57 35.9   +07 03 05     1.227    2.107  143.7   16.1   276   27.3 
2026-02-26 00:00 UT   12 56 36.3   +07 13 49     1.221    2.110  144.9   15.6   275   27.3 
2026-02-27 00:00 UT   12 55 34.3   +07 24 40     1.216    2.112  146.1   15.2   274   27.3 
2026-02-28 00:00 UT   12 54 30.1   +07 35 38     1.211    2.114  147.3   14.7   273   27.3 
2026-03-01 00:00 UT   12 53 23.6   +07 46 42     1.206    2.116  148.5   14.2   272   27.2 
2026-03-02 00:00 UT   12 52 15.0   +07 57 51     1.202    2.117  149.7   13.6   271   27.2 
2026-03-03 00:00 UT   12 51 04.2   +08 09 05     1.198    2.119  150.9   13.1   270   27.2 
2026-03-04 00:00 UT   12 49 51.3   +08 20 22     1.194    2.121  152.1   12.6   268   27.2 
2026-03-05 00:00 UT   12 48 36.5   +08 31 42     1.190    2.123  153.3   12.1   267   27.1 
2026-03-06 00:00 UT   12 47 19.7   +08 43 05     1.186    2.125  154.5   11.6   265   27.1 
2026-03-07 00:00 UT   12 46 01.0   +08 54 29     1.183    2.127  155.6   11.1   264   27.1 
2026-03-08 00:00 UT   12 44 40.5   +09 05 53     1.180    2.128  156.8   10.6   262   27.1 
2026-03-09 00:00 UT   12 43 18.2   +09 17 18     1.177    2.130  157.9   10.1   260   27.0 
2026-03-10 00:00 UT   12 41 54.4   +09 28 40     1.175    2.132  159.0    9.6   257   27.0 
2026-03-11 00:00 UT   12 40 28.9   +09 40 01     1.173    2.134  160.0    9.1   255   27.0 
2026-03-12 00:00 UT   12 39 02.0   +09 51 18     1.171    2.135  161.1    8.7   252   27.0 
2026-03-13 00:00 UT   12 37 33.7   +10 02 32     1.169    2.137  162.1    8.2   249   27.0 
2026-03-14 00:00 UT   12 36 04.2   +10 13 40     1.168    2.138  163.0    7.8   245   26.9 
2026-03-15 00:00 UT   12 34 33.5   +10 24 43     1.167    2.140  163.8    7.4   241   26.9 

    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.