2001 YD1
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Jul 2026	28.9	2.129 AU	2.159 AU	11h59m	+06°40'	74.7°	27.4°

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
2026-07-05 00:00 UT   11 59 35.9   +06 40 13     2.159    2.129   74.7   27.4   112   28.9 
2026-07-05 23:39 UT   12 00 37.9   +06 30 21     2.169    2.128   74.1   27.3   112   28.9 
2026-07-06 00:00 UT   12 00 38.8   +06 30 13     2.169    2.128   74.0   27.3   112   28.9 
2026-07-07 00:00 UT   12 01 42.5   +06 20 09     2.180    2.126   73.4   27.3   112   29.0 
2026-07-08 00:00 UT   12 02 46.9   +06 10 02     2.191    2.124   72.8   27.2   112   29.0 
2026-07-09 00:00 UT   12 03 52.2   +05 59 52     2.201    2.122   72.1   27.1   112   29.0 
2026-07-10 00:00 UT   12 04 58.2   +05 49 39     2.211    2.121   71.5   27.0   112   29.0 
2026-07-11 00:00 UT   12 06 05.0   +05 39 23     2.222    2.119   70.9   27.0   112   29.0 
2026-07-12 00:00 UT   12 07 12.5   +05 29 04     2.232    2.117   70.2   26.9   111   29.0 
2026-07-13 00:00 UT   12 08 20.7   +05 18 41     2.242    2.115   69.6   26.8   111   29.0 
2026-07-14 00:00 UT   12 09 29.7   +05 08 16     2.252    2.113   69.0   26.7   111   29.0 
2026-07-15 00:00 UT   12 10 39.3   +04 57 48     2.262    2.111   68.4   26.6   111   29.0 
2026-07-16 00:00 UT   12 11 49.7   +04 47 17     2.272    2.109   67.8   26.5   111   29.0 
2026-07-17 00:00 UT   12 13 00.8   +04 36 43     2.281    2.107   67.2   26.4   111   29.0 
2026-07-18 00:00 UT   12 14 12.5   +04 26 06     2.291    2.105   66.6   26.3   111   29.0 
2026-07-19 00:00 UT   12 15 25.0   +04 15 27     2.301    2.102   66.0   26.2   111   29.0 
2026-07-20 00:00 UT   12 16 38.0   +04 04 45     2.310    2.100   65.4   26.1   111   29.0 
2026-07-21 00:00 UT   12 17 51.8   +03 54 01     2.320    2.098   64.8   26.0   111   29.0 
2026-07-22 00:00 UT   12 19 06.2   +03 43 14     2.329    2.096   64.2   25.9   111   29.0 
2026-07-23 00:00 UT   12 20 21.2   +03 32 25     2.338    2.094   63.6   25.8   111   29.0 
2026-07-24 00:00 UT   12 21 36.9   +03 21 33     2.347    2.091   63.0   25.6   111   29.0 
2026-07-25 00:00 UT   12 22 53.1   +03 10 39     2.356    2.089   62.4   25.5   111   29.0 
2026-07-26 00:00 UT   12 24 10.0   +02 59 43     2.365    2.087   61.8   25.4   111   29.0 
2026-07-27 00:00 UT   12 25 27.5   +02 48 45     2.374    2.084   61.2   25.3   111   29.0 
2026-07-28 00:00 UT   12 26 45.6   +02 37 44     2.383    2.082   60.6   25.2   110   29.0 
2026-07-29 00:00 UT   12 28 04.3   +02 26 42     2.391    2.080   60.0   25.0   110   29.0 

    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.