(517681) 2015 DE198
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Aug 2026	24.4	2.627 AU	3.495 AU	07h54m	+29°43'	26.4°	9.9°

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 2015 DE198 are:

            e (Eccentricity)                : 0.5824731
            a (Semimajor axis)              : 2.0638152
            i (Inclination)                 : 12.24158
            Ω (Longitude of ascending node) : 33.20633
            ω (Argument of perihelion)      : 218.16966
            M (Mean anomaly)                : 183.48643
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 70.73751
            B (Latitude of perihelion)      : -7.52943
            P (Orbital period in years)     : 2.96            
        

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
2026-08-13 00:00 UT   07 54 41.3   +29 43 57     3.495    2.627   26.4    9.9   299   24.4 
2026-08-13 04:43 UT   07 55 02.1   +29 43 17     3.493    2.626   26.5    9.9   299   24.4 
2026-08-14 00:00 UT   07 56 27.4   +29 40 33     3.485    2.622   26.9   10.1   299   24.4 
2026-08-15 00:00 UT   07 58 13.7   +29 37 06     3.474    2.617   27.5   10.3   299   24.4 
2026-08-16 00:00 UT   07 59 59.9   +29 33 36     3.463    2.612   28.0   10.5   299   24.4 
2026-08-17 00:00 UT   08 01 46.3   +29 30 03     3.451    2.607   28.5   10.7   298   24.4 
2026-08-18 00:00 UT   08 03 32.6   +29 26 27     3.440    2.602   29.1   10.9   298   24.4 
2026-08-19 00:00 UT   08 05 19.0   +29 22 48     3.428    2.597   29.6   11.1   298   24.4 
2026-08-20 00:00 UT   08 07 05.5   +29 19 07     3.417    2.592   30.2   11.3   298   24.4 
2026-08-21 00:00 UT   08 08 52.0   +29 15 22     3.405    2.587   30.7   11.5   298   24.4 
2026-08-22 00:00 UT   08 10 38.5   +29 11 34     3.393    2.582   31.3   11.7   298   24.4 
2026-08-23 00:00 UT   08 12 25.1   +29 07 44     3.381    2.577   31.8   11.9   297   24.4 
2026-08-24 00:00 UT   08 14 11.7   +29 03 50     3.369    2.572   32.4   12.1   297   24.3 
2026-08-25 00:00 UT   08 15 58.3   +28 59 54     3.356    2.567   32.9   12.4   297   24.3 
2026-08-26 00:00 UT   08 17 45.0   +28 55 54     3.344    2.562   33.5   12.6   297   24.3 
2026-08-27 00:00 UT   08 19 31.7   +28 51 52     3.331    2.557   34.0   12.8   297   24.3 
2026-08-28 00:00 UT   08 21 18.4   +28 47 47     3.318    2.552   34.6   13.0   297   24.3 
2026-08-29 00:00 UT   08 23 05.2   +28 43 39     3.306    2.546   35.1   13.2   297   24.3 
2026-08-30 00:00 UT   08 24 52.0   +28 39 29     3.293    2.541   35.7   13.4   297   24.3 
2026-08-31 00:00 UT   08 26 38.8   +28 35 15     3.280    2.536   36.2   13.6   297   24.3 
2026-09-01 00:00 UT   08 28 25.7   +28 30 59     3.266    2.531   36.7   13.8   297   24.3 
2026-09-02 00:00 UT   08 30 12.6   +28 26 40     3.253    2.525   37.3   14.0   296   24.3 
2026-09-03 00:00 UT   08 31 59.5   +28 22 18     3.240    2.520   37.9   14.2   296   24.3 

    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.