(105) Artemis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	1 Sep 2025	11.8	2.313 AU	1.335 AU	22h15m	+09°30'	161.1°	8.1°
Today	15 Sep 2025	11.9	2.340 AU	1.381 AU	22h06m	+05°51'	157.1°	9.6°

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 Artemis are:

            e (Eccentricity)                : 0.1790290
            a (Semimajor axis)              : 2.3724977
            i (Inclination)                 : 21.45543
            Ω (Longitude of ascending node) : 188.21338
            ω (Argument of perihelion)      : 56.95628
            M (Mean anomaly)                : 93.49708
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 243.26264
            B (Latitude of perihelion)      : 17.85533
            P (Orbital period in years)     : 3.65            
        

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
2025-09-15 00:00 UT   22 06 25.9   +05 51 24     1.381    2.340  157.1    9.6   113   11.9 
2025-09-15 14:35 UT   22 06 05.4   +05 41 21     1.384    2.342  156.7    9.8   111   11.9 
2025-09-16 00:00 UT   22 05 52.5   +05 34 52     1.386    2.342  156.4    9.9   110   12.0 
2025-09-17 00:00 UT   22 05 20.3   +05 18 22     1.392    2.344  155.6   10.2   108   12.0 
2025-09-18 00:00 UT   22 04 49.5   +05 01 55     1.398    2.346  154.8   10.5   106   12.0 
2025-09-19 00:00 UT   22 04 20.0   +04 45 32     1.404    2.348  154.0   10.8   104   12.0 
2025-09-20 00:00 UT   22 03 52.0   +04 29 12     1.410    2.350  153.2   11.1   102   12.0 
2025-09-21 00:00 UT   22 03 25.4   +04 12 59     1.416    2.352  152.3   11.4   100   12.1 
2025-09-22 00:00 UT   22 03 00.2   +03 56 51     1.423    2.354  151.4   11.8    98   12.1 
2025-09-23 00:00 UT   22 02 36.6   +03 40 49     1.430    2.356  150.5   12.1    97   12.1 
2025-09-24 00:00 UT   22 02 14.5   +03 24 55     1.438    2.358  149.6   12.4    95   12.1 
2025-09-25 00:00 UT   22 01 53.9   +03 09 09     1.445    2.360  148.7   12.7    94   12.2 
2025-09-26 00:00 UT   22 01 35.0   +02 53 32     1.453    2.362  147.8   13.1    92   12.2 
2025-09-27 00:00 UT   22 01 17.6   +02 38 04     1.461    2.364  146.8   13.4    91   12.2 
2025-09-28 00:00 UT   22 01 01.8   +02 22 45     1.469    2.366  145.9   13.7    90   12.2 
2025-09-29 00:00 UT   22 00 47.6   +02 07 37     1.477    2.368  144.9   14.1    89   12.3 
2025-09-30 00:00 UT   22 00 35.0   +01 52 40     1.486    2.370  144.0   14.4    88   12.3 
2025-10-01 00:00 UT   22 00 24.1   +01 37 55     1.495    2.372  143.0   14.7    87   12.3 
2025-10-02 00:00 UT   22 00 14.9   +01 23 21     1.504    2.374  142.0   15.0    86   12.3 
2025-10-03 00:00 UT   22 00 07.2   +01 08 59     1.513    2.376  141.1   15.3    85   12.4 
2025-10-04 00:00 UT   22 00 01.2   +00 54 50     1.523    2.378  140.1   15.7    85   12.4 
2025-10-05 00:00 UT   21 59 56.9   +00 40 54     1.532    2.380  139.1   16.0    84   12.4 
2025-10-06 00:00 UT   21 59 54.2   +00 27 11     1.542    2.382  138.2   16.3    83   12.5 
2025-10-07 00:00 UT   21 59 53.1   +00 13 42     1.552    2.384  137.2   16.6    82   12.5 
2025-10-08 00:00 UT   21 59 53.7   +00 00 26     1.563    2.386  136.2   16.8    82   12.5 
2025-10-09 00:00 UT   21 59 55.9   +00 12 35     1.573    2.388  135.2   17.1    81   12.5 
2025-10-10 00:00 UT   21 59 59.7   +00 25 22     1.584    2.390  134.3   17.4    80   12.6 
2025-10-11 00:00 UT   22 00 05.1   +00 37 55     1.595    2.392  133.3   17.7    80   12.6 
2025-10-12 00:00 UT   22 00 12.1   +00 50 13     1.606    2.394  132.3   17.9    79   12.6 
2025-10-13 00:00 UT   22 00 20.7   -01 02 17     1.617    2.396  131.4   18.2    79   12.6 
2025-10-14 00:00 UT   22 00 30.9   -01 14 05     1.628    2.398  130.4   18.5    78   12.7 
2025-10-15 00:00 UT   22 00 42.7   -01 25 38     1.640    2.400  129.5   18.7    78   12.7 

    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.