2001 YD1
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Mar 2026	26.9	2.147 AU	1.166 AU	12h26m	+11°17'	166.7°	6.1°

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
2026-03-20 00:00 UT   12 26 46.5   +11 17 53     1.166    2.147  166.7    6.1   215   26.9 
2026-03-20 13:21 UT   12 25 53.5   +11 23 32     1.166    2.148  166.9    6.0   212   26.9 
2026-03-21 00:00 UT   12 25 11.2   +11 27 60     1.167    2.149  166.9    6.0   209   26.9 
2026-03-22 00:00 UT   12 23 35.6   +11 37 55     1.167    2.150  167.0    6.0   203   26.9 
2026-03-23 00:00 UT   12 21 59.9   +11 47 37     1.169    2.151  166.9    6.0   196   26.9 
2026-03-24 00:00 UT   12 20 24.0   +11 57 05     1.170    2.153  166.7    6.1   190   26.9 
2026-03-25 00:00 UT   12 18 48.2   +12 06 18     1.172    2.154  166.3    6.3   184   26.9 
2026-03-26 00:00 UT   12 17 12.6   +12 15 16     1.174    2.155  165.8    6.5   179   26.9 
2026-03-27 00:00 UT   12 15 37.3   +12 23 59     1.177    2.156  165.1    6.8   174   26.9 
2026-03-28 00:00 UT   12 14 02.4   +12 32 25     1.179    2.157  164.4    7.1   169   27.0 
2026-03-29 00:00 UT   12 12 28.0   +12 40 34     1.182    2.159  163.6    7.5   165   27.0 
2026-03-30 00:00 UT   12 10 54.2   +12 48 26     1.186    2.160  162.8    7.9   161   27.0 
2026-03-31 00:00 UT   12 09 21.2   +12 55 60     1.189    2.161  161.8    8.3   158   27.0 
2026-04-01 00:00 UT   12 07 49.1   +13 03 15     1.193    2.162  160.9    8.7   155   27.1 
2026-04-02 00:00 UT   12 06 18.0   +13 10 13     1.197    2.163  159.9    9.2   152   27.1 
2026-04-03 00:00 UT   12 04 47.9   +13 16 52     1.201    2.164  158.8    9.6   149   27.1 
2026-04-04 00:00 UT   12 03 18.9   +13 23 11     1.206    2.165  157.7   10.1   147   27.1 
2026-04-05 00:00 UT   12 01 51.2   +13 29 12     1.211    2.166  156.6   10.6   145   27.2 
2026-04-06 00:00 UT   12 00 24.9   +13 34 53     1.216    2.167  155.5   11.0   143   27.2 
2026-04-07 00:00 UT   11 58 60.0   +13 40 14     1.221    2.167  154.4   11.5   141   27.2 
2026-04-08 00:00 UT   11 57 36.6   +13 45 16     1.227    2.168  153.3   12.0   140   27.2 
2026-04-09 00:00 UT   11 56 14.8   +13 49 58     1.233    2.169  152.1   12.5   138   27.3 
2026-04-10 00:00 UT   11 54 54.6   +13 54 21     1.239    2.170  151.0   13.0   137   27.3 

    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.