(141) Lumen
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	7 Aug 2025	10.9	2.307 AU	1.293 AU	21h14m	-17°08'	178.5°	0.7°
Today	31 Aug 2025	11.5	2.261 AU	1.314 AU	20h51m	-16°08'	153.3°	11.6°

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 Lumen are:

            e (Eccentricity)                : 0.2131070
            a (Semimajor axis)              : 2.6668886
            i (Inclination)                 : 11.89498
            Ω (Longitude of ascending node) : 318.43881
            ω (Argument of perihelion)      : 57.87407
            M (Mean anomaly)                : 297.36470
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 15.75015
            B (Latitude of perihelion)      : 10.05293
            P (Orbital period in years)     : 4.36            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-08-31 00:00 UT   20 51 26.1   -16 08 53     1.314    2.261  153.3   11.6    77   11.5 
2025-08-31 02:08 UT   20 51 21.9   -16 08 36     1.314    2.261  153.2   11.6    77   11.5 
2025-09-01 00:00 UT   20 50 39.4   -16 05 36     1.318    2.260  152.1   12.1    77   11.5 
2025-09-02 00:00 UT   20 49 54.3   -16 02 15     1.322    2.258  151.0   12.5    77   11.5 
2025-09-03 00:00 UT   20 49 10.9   -15 58 50     1.326    2.256  149.9   13.0    77   11.5 
2025-09-04 00:00 UT   20 48 29.2   -15 55 21     1.330    2.254  148.8   13.4    78   11.5 
2025-09-05 00:00 UT   20 47 49.3   -15 51 49     1.335    2.252  147.7   13.9    78   11.6 
2025-09-06 00:00 UT   20 47 11.1   -15 48 13     1.340    2.250  146.5   14.3    78   11.6 
2025-09-07 00:00 UT   20 46 34.8   -15 44 33     1.345    2.249  145.4   14.7    78   11.6 
2025-09-08 00:00 UT   20 46 00.3   -15 40 50     1.350    2.247  144.4   15.1    78   11.6 
2025-09-09 00:00 UT   20 45 27.6   -15 37 04     1.355    2.245  143.3   15.6    78   11.6 
2025-09-10 00:00 UT   20 44 56.9   -15 33 14     1.361    2.243  142.2   16.0    78   11.7 
2025-09-11 00:00 UT   20 44 28.1   -15 29 20     1.367    2.241  141.1   16.4    78   11.7 
2025-09-12 00:00 UT   20 44 01.2   -15 25 23     1.373    2.240  140.1   16.8    78   11.7 
2025-09-13 00:00 UT   20 43 36.3   -15 21 23     1.379    2.238  139.0   17.2    78   11.7 
2025-09-14 00:00 UT   20 43 13.4   -15 17 20     1.385    2.236  138.0   17.5    78   11.8 
2025-09-15 00:00 UT   20 42 52.4   -15 13 13     1.392    2.234  136.9   17.9    78   11.8 
2025-09-16 00:00 UT   20 42 33.5   -15 09 03     1.398    2.233  135.9   18.3    78   11.8 
2025-09-17 00:00 UT   20 42 16.6   -15 04 50     1.405    2.231  134.9   18.6    78   11.8 
2025-09-18 00:00 UT   20 42 01.7   -15 00 33     1.412    2.229  133.9   19.0    78   11.8 
2025-09-19 00:00 UT   20 41 48.9   -14 56 13     1.419    2.228  132.8   19.3    78   11.9 
2025-09-20 00:00 UT   20 41 38.1   -14 51 50     1.426    2.226  131.8   19.6    78   11.9 
2025-09-21 00:00 UT   20 41 29.3   -14 47 23     1.434    2.224  130.9   20.0    78   11.9 
2025-09-22 00:00 UT   20 41 22.6   -14 42 54     1.441    2.223  129.9   20.3    78   11.9 
2025-09-23 00:00 UT   20 41 18.0   -14 38 21     1.449    2.221  128.9   20.6    78   11.9 
2025-09-24 00:00 UT   20 41 15.4   -14 33 44     1.457    2.219  127.9   20.9    78   12.0 
2025-09-25 00:00 UT   20 41 14.8   -14 29 04     1.465    2.218  127.0   21.2    78   12.0 
2025-09-26 00:00 UT   20 41 16.3   -14 24 21     1.473    2.216  126.0   21.5    78   12.0 
2025-09-27 00:00 UT   20 41 19.8   -14 19 35     1.481    2.214  125.1   21.8    78   12.0 
2025-09-28 00:00 UT   20 41 25.3   -14 14 45     1.489    2.213  124.1   22.0    78   12.0 
2025-09-29 00:00 UT   20 41 32.8   -14 09 52     1.498    2.211  123.2   22.3    78   12.1 
2025-09-30 00:00 UT   20 41 42.2   -14 04 56     1.506    2.209  122.3   22.5    78   12.1 

    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.