(119) Althaea
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Mar 2026	13.5	2.727 AU	2.422 AU	17h09m	-19°20'	96.9°	21.2°
Opposition	4 Jun 2026	11.9	2.671 AU	1.662 AU	16h56m	-15°23'	172.7°	2.8°

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 Althaea are:

            e (Eccentricity)                : 0.0818740
            a (Semimajor axis)              : 2.5808178
            i (Inclination)                 : 5.78683
            Ω (Longitude of ascending node) : 203.61464
            ω (Argument of perihelion)      : 170.31414
            M (Mean anomaly)                : 202.39835
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 193.97721
            B (Latitude of perihelion)      : 0.97200
            P (Orbital period in years)     : 4.15            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-03-16 00:00 UT   17 09 34.5   -19 20 29     2.422    2.727   96.9   21.2   275   13.5 
2026-03-16 07:54 UT   17 09 50.1   -19 20 00     2.417    2.726   97.2   21.2   275   13.5 
2026-03-17 00:00 UT   17 10 21.5   -19 19 01     2.407    2.726   97.7   21.2   274   13.5 
2026-03-18 00:00 UT   17 11 07.4   -19 17 29     2.393    2.725   98.6   21.2   274   13.4 
2026-03-19 00:00 UT   17 11 52.0   -19 15 53     2.379    2.725   99.4   21.1   274   13.4 
2026-03-20 00:00 UT   17 12 35.5   -19 14 14     2.365    2.724  100.2   21.1   274   13.4 
2026-03-21 00:00 UT   17 13 17.7   -19 12 31     2.351    2.724  101.0   21.0   274   13.4 
2026-03-22 00:00 UT   17 13 58.7   -19 10 45     2.338    2.723  101.9   21.0   274   13.4 
2026-03-23 00:00 UT   17 14 38.3   -19 08 56     2.324    2.722  102.7   20.9   274   13.4 
2026-03-24 00:00 UT   17 15 16.8   -19 07 03     2.310    2.722  103.5   20.9   273   13.3 
2026-03-25 00:00 UT   17 15 53.9   -19 05 07     2.296    2.721  104.4   20.8   273   13.3 
2026-03-26 00:00 UT   17 16 29.7   -19 03 07     2.282    2.721  105.2   20.7   273   13.3 
2026-03-27 00:00 UT   17 17 04.1   -19 01 04     2.269    2.720  106.1   20.6   273   13.3 
2026-03-28 00:00 UT   17 17 37.3   -18 58 58     2.255    2.719  107.0   20.6   273   13.3 
2026-03-29 00:00 UT   17 18 09.0   -18 56 49     2.242    2.719  107.8   20.5   273   13.3 
2026-03-30 00:00 UT   17 18 39.4   -18 54 37     2.228    2.718  108.7   20.4   273   13.3 
2026-03-31 00:00 UT   17 19 08.5   -18 52 22     2.215    2.717  109.6   20.3   273   13.2 
2026-04-01 00:00 UT   17 19 36.1   -18 50 04     2.202    2.717  110.4   20.2   272   13.2 
2026-04-02 00:00 UT   17 20 02.3   -18 47 43     2.188    2.716  111.3   20.0   272   13.2 
2026-04-03 00:00 UT   17 20 27.1   -18 45 19     2.175    2.716  112.2   19.9   272   13.2 
2026-04-04 00:00 UT   17 20 50.4   -18 42 52     2.162    2.715  113.1   19.8   272   13.2 
2026-04-05 00:00 UT   17 21 12.2   -18 40 22     2.149    2.714  114.0   19.7   272   13.1 
2026-04-06 00:00 UT   17 21 32.6   -18 37 49     2.136    2.714  114.9   19.5   272   13.1 
2026-04-07 00:00 UT   17 21 51.4   -18 35 14     2.123    2.713  115.8   19.4   272   13.1 
2026-04-08 00:00 UT   17 22 08.8   -18 32 36     2.111    2.712  116.7   19.3   271   13.1 
2026-04-09 00:00 UT   17 22 24.6   -18 29 55     2.098    2.712  117.6   19.1   271   13.1 
2026-04-10 00:00 UT   17 22 38.9   -18 27 12     2.085    2.711  118.6   18.9   271   13.1 
2026-04-11 00:00 UT   17 22 51.6   -18 24 26     2.073    2.710  119.5   18.8   271   13.0 
2026-04-12 00:00 UT   17 23 02.8   -18 21 38     2.061    2.710  120.4   18.6   271   13.0 
2026-04-13 00:00 UT   17 23 12.3   -18 18 47     2.048    2.709  121.4   18.4   271   13.0 
2026-04-14 00:00 UT   17 23 20.3   -18 15 54     2.036    2.708  122.3   18.2   271   13.0 
2026-04-15 00:00 UT   17 23 26.6   -18 12 59     2.024    2.708  123.2   18.0   270   13.0 

    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.