2001 YD1
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Jan 2026	28.3	1.963 AU	1.662 AU	12h57m	+02°40'	92.2°	30.0°

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
2026-01-05 00:00 UT   12 57 03.6   +02 40 40     1.662    1.963   92.2   30.0   293   28.3 
2026-01-05 11:32 UT   12 57 27.6   +02 40 21     1.657    1.965   92.6   30.0   293   28.3 
2026-01-06 00:00 UT   12 57 53.1   +02 40 05     1.652    1.966   93.0   30.0   292   28.3 
2026-01-07 00:00 UT   12 58 41.1   +02 39 42     1.643    1.970   93.8   29.9   292   28.2 
2026-01-08 00:00 UT   12 59 27.6   +02 39 31     1.633    1.974   94.6   29.8   292   28.2 
2026-01-09 00:00 UT   13 00 12.6   +02 39 33     1.624    1.977   95.5   29.7   292   28.2 
2026-01-10 00:00 UT   13 00 55.9   +02 39 48     1.614    1.981   96.3   29.6   292   28.2 
2026-01-11 00:00 UT   13 01 37.7   +02 40 16     1.605    1.984   97.2   29.5   292   28.2 
2026-01-12 00:00 UT   13 02 17.8   +02 40 56     1.595    1.987   98.0   29.3   292   28.2 
2026-01-13 00:00 UT   13 02 56.3   +02 41 50     1.585    1.991   98.9   29.2   291   28.2 
2026-01-14 00:00 UT   13 03 33.0   +02 42 57     1.576    1.994   99.8   29.1   291   28.2 
2026-01-15 00:00 UT   13 04 08.1   +02 44 18     1.566    1.997  100.6   28.9   291   28.1 
2026-01-16 00:00 UT   13 04 41.4   +02 45 53     1.557    2.001  101.5   28.8   291   28.1 
2026-01-17 00:00 UT   13 05 12.8   +02 47 41     1.547    2.004  102.4   28.6   291   28.1 
2026-01-18 00:00 UT   13 05 42.5   +02 49 43     1.537    2.007  103.3   28.5   291   28.1 
2026-01-19 00:00 UT   13 06 10.3   +02 51 59     1.528    2.010  104.2   28.3   290   28.1 
2026-01-20 00:00 UT   13 06 36.3   +02 54 30     1.518    2.014  105.1   28.1   290   28.1 
2026-01-21 00:00 UT   13 07 00.3   +02 57 14     1.509    2.017  106.1   28.0   290   28.1 
2026-01-22 00:00 UT   13 07 22.3   +03 00 13     1.499    2.020  107.0   27.8   290   28.0 
2026-01-23 00:00 UT   13 07 42.4   +03 03 26     1.490    2.023  107.9   27.6   290   28.0 
2026-01-24 00:00 UT   13 08 00.5   +03 06 54     1.480    2.026  108.9   27.4   289   28.0 
2026-01-25 00:00 UT   13 08 16.6   +03 10 36     1.471    2.029  109.9   27.2   289   28.0 
2026-01-26 00:00 UT   13 08 30.6   +03 14 33     1.462    2.032  110.8   26.9   289   28.0 
2026-01-27 00:00 UT   13 08 42.6   +03 18 44     1.452    2.035  111.8   26.7   289   28.0 
2026-01-28 00:00 UT   13 08 52.4   +03 23 10     1.443    2.038  112.8   26.5   288   27.9 
2026-01-29 00:00 UT   13 09 00.1   +03 27 51     1.434    2.041  113.8   26.2   288   27.9 
2026-01-30 00:00 UT   13 09 05.6   +03 32 46     1.425    2.044  114.8   26.0   288   27.9 
2026-01-31 00:00 UT   13 09 09.0   +03 37 57     1.416    2.046  115.8   25.7   288   27.9 
2026-02-01 00:00 UT   13 09 10.1   +03 43 21     1.407    2.049  116.8   25.4   287   27.9 
2026-02-02 00:00 UT   13 09 09.0   +03 49 01     1.398    2.052  117.8   25.1   287   27.8 
2026-02-03 00:00 UT   13 09 05.6   +03 54 56     1.389    2.055  118.9   24.8   287   27.8 
2026-02-04 00:00 UT   13 08 59.9   +04 01 05     1.380    2.057  119.9   24.5   287   27.8 

    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.