(105) Artemis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	21 Jul 2025	12.4	2.227 AU	1.470 AU	22h41m	+15°52'	126.3°	21.6°
Opposition	1 Sep 2025	11.8	2.313 AU	1.335 AU	22h15m	+09°30'	161.1°	8.1°

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)                : 0.1790429
            a (Semimajor axis)              : 2.3728523
            i (Inclination)                 : 21.45377
            Ω (Longitude of ascending node) : 188.21648
            ω (Argument of perihelion)      : 56.99842
            M (Mean anomaly)                : 39.51759
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 243.30934
            B (Latitude of perihelion)      : 17.86279
            P (Orbital period in years)     : 3.66            
        

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
2025-07-21 00:00 UT   22 41 59.5   +15 52 06     1.470    2.227  126.3   21.6   229   12.4 
2025-07-21 07:37 UT   22 41 55.5   +15 51 39     1.467    2.228  126.6   21.5   228   12.4 
2025-07-22 00:00 UT   22 41 46.4   +15 50 33     1.463    2.229  127.2   21.3   228   12.4 
2025-07-23 00:00 UT   22 41 31.8   +15 48 40     1.456    2.231  128.1   21.0   227   12.3 
2025-07-24 00:00 UT   22 41 15.5   +15 46 25     1.450    2.233  129.0   20.7   227   12.3 
2025-07-25 00:00 UT   22 40 57.6   +15 43 50     1.443    2.235  129.9   20.4   226   12.3 
2025-07-26 00:00 UT   22 40 38.1   +15 40 53     1.437    2.237  130.8   20.1   226   12.3 
2025-07-27 00:00 UT   22 40 17.1   +15 37 34     1.431    2.239  131.8   19.8   225   12.3 
2025-07-28 00:00 UT   22 39 54.5   +15 33 54     1.425    2.241  132.7   19.5   224   12.3 
2025-07-29 00:00 UT   22 39 30.4   +15 29 51     1.419    2.243  133.6   19.1   223   12.2 
2025-07-30 00:00 UT   22 39 04.8   +15 25 26     1.413    2.245  134.6   18.8   223   12.2 
2025-07-31 00:00 UT   22 38 37.7   +15 20 39     1.407    2.247  135.5   18.5   222   12.2 
2025-08-01 00:00 UT   22 38 09.3   +15 15 29     1.402    2.249  136.4   18.1   221   12.2 
2025-08-02 00:00 UT   22 37 39.4   +15 09 57     1.397    2.251  137.4   17.8   220   12.2 
2025-08-03 00:00 UT   22 37 08.2   +15 04 02     1.392    2.253  138.3   17.4   219   12.1 
2025-08-04 00:00 UT   22 36 35.7   +14 57 45     1.387    2.255  139.3   17.1   218   12.1 
2025-08-05 00:00 UT   22 36 01.9   +14 51 04     1.382    2.257  140.2   16.7   218   12.1 
2025-08-06 00:00 UT   22 35 26.9   +14 44 01     1.378    2.259  141.2   16.3   217   12.1 
2025-08-07 00:00 UT   22 34 50.7   +14 36 35     1.373    2.261  142.1   16.0   216   12.1 
2025-08-08 00:00 UT   22 34 13.3   +14 28 47     1.369    2.263  143.1   15.6   214   12.1 
2025-08-09 00:00 UT   22 33 34.9   +14 20 35     1.365    2.265  144.0   15.2   213   12.0 
2025-08-10 00:00 UT   22 32 55.4   +14 12 02     1.361    2.267  145.0   14.9   212   12.0 
2025-08-11 00:00 UT   22 32 14.9   +14 03 05     1.358    2.269  145.9   14.5   211   12.0 
2025-08-12 00:00 UT   22 31 33.5   +13 53 47     1.354    2.271  146.9   14.1   210   12.0 
2025-08-13 00:00 UT   22 30 51.2   +13 44 06     1.351    2.273  147.8   13.7   208   12.0 
2025-08-14 00:00 UT   22 30 08.0   +13 34 04     1.348    2.275  148.7   13.4   207   12.0 
2025-08-15 00:00 UT   22 29 24.1   +13 23 39     1.345    2.277  149.6   13.0   205   11.9 
2025-08-16 00:00 UT   22 28 39.4   +13 12 53     1.343    2.279  150.5   12.6   204   11.9 
2025-08-17 00:00 UT   22 27 54.1   +13 01 46     1.340    2.281  151.4   12.3   202   11.9 
2025-08-18 00:00 UT   22 27 08.2   +12 50 19     1.338    2.284  152.3   11.9   200   11.9 
2025-08-19 00:00 UT   22 26 21.7   +12 38 31     1.336    2.286  153.2   11.5   198   11.9 
2025-08-20 00:00 UT   22 25 34.8   +12 26 22     1.335    2.288  154.0   11.2   196   11.9 

    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.