(42) Isis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	27 Jun 2024	9.4	2.006 AU	0.991 AU	18h31m	-26°57'	176.1°	2.0°
Today	27 Jul 2024	10.1	1.959 AU	1.030 AU	18h06m	-29°56'	146.7°	16.6°

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 Isis are:

            e (Eccentricity)                : 0.2221022
            a (Semimajor axis)              : 2.4429345
            i (Inclination)                 : 8.51104
            Ω (Longitude of ascending node) : 84.16599
            ω (Argument of perihelion)      : 237.24368
            M (Mean anomaly)                : 308.31689
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 141.12031
            B (Latitude of perihelion)      : -7.14986
            P (Orbital period in years)     : 3.82            
        

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. 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
2024-07-27 00:00 UT   18 06 13.0   -29 56 41     1.030    1.959  146.7   16.6    79   10.1 
2024-07-27 07:43 UT   18 06 03.8   -29 58 02     1.031    1.959  146.3   16.7    79   10.1 
2024-07-28 00:00 UT   18 05 45.3   -30 00 52     1.034    1.958  145.6   17.0    80   10.1 
2024-07-29 00:00 UT   18 05 19.8   -30 04 56     1.039    1.957  144.6   17.5    80   10.2 
2024-07-30 00:00 UT   18 04 56.7   -30 08 52     1.043    1.955  143.5   18.0    80   10.2 
2024-07-31 00:00 UT   18 04 36.0   -30 12 42     1.048    1.954  142.5   18.4    81   10.2 
2024-08-01 00:00 UT   18 04 17.6   -30 16 24     1.053    1.953  141.5   18.9    81   10.2 
2024-08-02 00:00 UT   18 04 01.7   -30 19 59     1.059    1.951  140.5   19.3    81   10.3 
2024-08-03 00:00 UT   18 03 48.3   -30 23 27     1.064    1.950  139.5   19.7    81   10.3 
2024-08-04 00:00 UT   18 03 37.3   -30 26 49     1.069    1.949  138.5   20.2    82   10.3 
2024-08-05 00:00 UT   18 03 28.9   -30 30 03     1.075    1.948  137.5   20.6    82   10.3 
2024-08-06 00:00 UT   18 03 23.0   -30 33 12     1.081    1.946  136.6   21.0    82   10.4 
2024-08-07 00:00 UT   18 03 19.6   -30 36 13     1.087    1.945  135.6   21.4    82   10.4 
2024-08-08 00:00 UT   18 03 18.8   -30 39 09     1.093    1.944  134.7   21.8    82   10.4 
2024-08-09 00:00 UT   18 03 20.6   -30 41 58     1.099    1.943  133.7   22.2    83   10.4 
2024-08-10 00:00 UT   18 03 24.9   -30 44 41     1.105    1.942  132.8   22.5    83   10.4 
2024-08-11 00:00 UT   18 03 31.8   -30 47 18     1.111    1.940  131.8   22.9    83   10.5 
2024-08-12 00:00 UT   18 03 41.3   -30 49 48     1.118    1.939  130.9   23.3    83   10.5 
2024-08-13 00:00 UT   18 03 53.3   -30 52 13     1.124    1.938  130.0   23.6    83   10.5 
2024-08-14 00:00 UT   18 04 07.9   -30 54 33     1.131    1.937  129.1   23.9    83   10.5 
2024-08-15 00:00 UT   18 04 25.0   -30 56 46     1.138    1.936  128.2   24.3    84   10.6 
2024-08-16 00:00 UT   18 04 44.6   -30 58 54     1.145    1.935  127.4   24.6    84   10.6 
2024-08-17 00:00 UT   18 05 06.7   -31 00 56     1.152    1.934  126.5   24.9    84   10.6 
2024-08-18 00:00 UT   18 05 31.2   -31 02 53     1.159    1.933  125.6   25.2    84   10.6 
2024-08-19 00:00 UT   18 05 58.3   -31 04 44     1.167    1.932  124.8   25.5    84   10.6 
2024-08-20 00:00 UT   18 06 27.7   -31 06 30     1.174    1.931  123.9   25.8    84   10.7 
2024-08-21 00:00 UT   18 06 59.6   -31 08 10     1.181    1.930  123.1   26.1    84   10.7 
2024-08-22 00:00 UT   18 07 33.8   -31 09 45     1.189    1.929  122.2   26.3    84   10.7 
2024-08-23 00:00 UT   18 08 10.4   -31 11 14     1.197    1.928  121.4   26.6    84   10.7 
2024-08-24 00:00 UT   18 08 49.3   -31 12 39     1.204    1.927  120.6   26.9    84   10.7 
2024-08-25 00:00 UT   18 09 30.6   -31 13 57     1.212    1.926  119.8   27.1    85   10.8 
2024-08-26 00:00 UT   18 10 14.1   -31 15 11     1.220    1.925  119.0   27.3    85   10.8 

    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.