(42) Isis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 Apr 2024	11.4	2.135 AU	1.492 AU	18h41m	-21°04'	116.1°	25.0°
Opposition	27 Jun 2024	9.4	2.006 AU	0.991 AU	18h31m	-26°57'	176.1°	2.0°

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
2024-04-26 00:00 UT   18 41 59.4   -21 04 42     1.492    2.135  116.1   25.0   265   11.4 
2024-04-26 04:58 UT   18 42 09.1   -21 05 13     1.489    2.135  116.3   25.0   265   11.4 
2024-04-27 00:00 UT   18 42 45.7   -21 07 13     1.479    2.133  116.9   24.9   265   11.4 
2024-04-28 00:00 UT   18 43 30.5   -21 09 48     1.467    2.131  117.7   24.7   265   11.3 
2024-04-29 00:00 UT   18 44 13.8   -21 12 28     1.455    2.128  118.5   24.6   265   11.3 
2024-04-30 00:00 UT   18 44 55.5   -21 15 14     1.443    2.126  119.3   24.4   265   11.3 
2024-05-01 00:00 UT   18 45 35.6   -21 18 04     1.431    2.124  120.1   24.2   264   11.3 
2024-05-02 00:00 UT   18 46 14.0   -21 21 00     1.419    2.122  121.0   24.0   264   11.2 
2024-05-03 00:00 UT   18 46 50.8   -21 24 02     1.407    2.119  121.8   23.8   264   11.2 
2024-05-04 00:00 UT   18 47 25.9   -21 27 09     1.395    2.117  122.6   23.6   264   11.2 
2024-05-05 00:00 UT   18 47 59.3   -21 30 23     1.384    2.115  123.5   23.4   264   11.1 
2024-05-06 00:00 UT   18 48 30.9   -21 33 42     1.372    2.113  124.3   23.2   264   11.1 
2024-05-07 00:00 UT   18 49 00.8   -21 37 08     1.361    2.110  125.2   23.0   264   11.1 
2024-05-08 00:00 UT   18 49 28.8   -21 40 40     1.350    2.108  126.1   22.8   264   11.1 
2024-05-09 00:00 UT   18 49 55.0   -21 44 19     1.338    2.106  126.9   22.5   264   11.0 
2024-05-10 00:00 UT   18 50 19.4   -21 48 04     1.327    2.104  127.8   22.3   264   11.0 
2024-05-11 00:00 UT   18 50 41.9   -21 51 57     1.316    2.101  128.7   22.0   264   11.0 
2024-05-12 00:00 UT   18 51 02.6   -21 55 56     1.306    2.099  129.6   21.8   264   11.0 
2024-05-13 00:00 UT   18 51 21.3   -22 00 02     1.295    2.097  130.5   21.5   264   10.9 
2024-05-14 00:00 UT   18 51 38.1   -22 04 16     1.284    2.095  131.4   21.2   264   10.9 
2024-05-15 00:00 UT   18 51 53.0   -22 08 37     1.274    2.093  132.3   20.9   264   10.9 
2024-05-16 00:00 UT   18 52 05.9   -22 13 05     1.264    2.090  133.2   20.6   264   10.8 
2024-05-17 00:00 UT   18 52 16.9   -22 17 40     1.254    2.088  134.2   20.3   264   10.8 
2024-05-18 00:00 UT   18 52 25.9   -22 22 23     1.244    2.086  135.1   20.0   264   10.8 
2024-05-19 00:00 UT   18 52 32.9   -22 27 14     1.234    2.084  136.1   19.7   264   10.8 
2024-05-20 00:00 UT   18 52 37.8   -22 32 12     1.224    2.082  137.0   19.4   264   10.7 
2024-05-21 00:00 UT   18 52 40.8   -22 37 17     1.214    2.080  138.0   19.0   265   10.7 
2024-05-22 00:00 UT   18 52 41.7   -22 42 31     1.205    2.078  138.9   18.7   265   10.7 
2024-05-23 00:00 UT   18 52 40.5   -22 47 51     1.196    2.075  139.9   18.3   265   10.6 
2024-05-24 00:00 UT   18 52 37.3   -22 53 20     1.187    2.073  140.9   17.9   265   10.6 
2024-05-25 00:00 UT   18 52 32.0   -22 58 55     1.178    2.071  141.9   17.6   265   10.6 
2024-05-26 00:00 UT   18 52 24.7   -23 04 39     1.169    2.069  142.9   17.2   265   10.5 

    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.