(138) Tolosa
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Jan 2025	13.8	2.326 AU	2.335 AU	00h45m	+03°50'	77.3°	24.4°
Opposition	19 Jan 2026	12.8	2.824 AU	1.842 AU	08h10m	+24°36'	175.5°	1.6°

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 Tolosa are:

            e (Eccentricity)                : 0.1616788
            a (Semimajor axis)              : 2.4489597
            i (Inclination)                 : 3.20214
            Ω (Longitude of ascending node) : 54.72075
            ω (Argument of perihelion)      : 260.69653
            M (Mean anomaly)                : 39.93823
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 135.40299
            B (Latitude of perihelion)      : -3.15998
            P (Orbital period in years)     : 3.83            
        

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
2025-01-15 00:00 UT   00 45 49.9   +03 50 03     2.335    2.326   77.3   24.4    67   13.8 
2025-01-15 08:22 UT   00 46 17.5   +03 53 25     2.340    2.326   77.1   24.3    67   13.8 
2025-01-16 00:00 UT   00 47 09.3   +03 59 44     2.349    2.328   76.6   24.3    67   13.9 
2025-01-17 00:00 UT   00 48 29.4   +04 09 27     2.363    2.329   76.0   24.2    67   13.9 
2025-01-18 00:00 UT   00 49 49.9   +04 19 12     2.377    2.331   75.4   24.1    67   13.9 
2025-01-19 00:00 UT   00 51 11.1   +04 28 58     2.391    2.333   74.7   24.0    67   13.9 
2025-01-20 00:00 UT   00 52 32.7   +04 38 46     2.405    2.335   74.1   23.9    67   13.9 
2025-01-21 00:00 UT   00 53 54.9   +04 48 36     2.418    2.337   73.4   23.8    68   13.9 
2025-01-22 00:00 UT   00 55 17.7   +04 58 27     2.432    2.338   72.8   23.7    68   13.9 
2025-01-23 00:00 UT   00 56 40.9   +05 08 20     2.446    2.340   72.2   23.6    68   13.9 
2025-01-24 00:00 UT   00 58 04.7   +05 18 14     2.460    2.342   71.5   23.5    68   13.9 
2025-01-25 00:00 UT   00 59 28.9   +05 28 09     2.473    2.344   70.9   23.4    68   14.0 
2025-01-26 00:00 UT   01 00 53.7   +05 38 05     2.487    2.346   70.3   23.3    68   14.0 
2025-01-27 00:00 UT   01 02 18.9   +05 48 02     2.501    2.347   69.6   23.2    68   14.0 
2025-01-28 00:00 UT   01 03 44.7   +05 58 01     2.514    2.349   69.0   23.0    68   14.0 
2025-01-29 00:00 UT   01 05 10.9   +06 08 00     2.528    2.351   68.4   22.9    68   14.0 
2025-01-30 00:00 UT   01 06 37.6   +06 18 01     2.541    2.353   67.8   22.8    68   14.0 
2025-01-31 00:00 UT   01 08 04.7   +06 28 01     2.555    2.354   67.2   22.7    68   14.0 
2025-02-01 00:00 UT   01 09 32.3   +06 38 03     2.568    2.356   66.5   22.6    68   14.0 
2025-02-02 00:00 UT   01 11 00.3   +06 48 05     2.582    2.358   65.9   22.4    68   14.0 
2025-02-03 00:00 UT   01 12 28.8   +06 58 08     2.595    2.360   65.3   22.3    68   14.0 
2025-02-04 00:00 UT   01 13 57.7   +07 08 11     2.608    2.362   64.7   22.2    68   14.0 
2025-02-05 00:00 UT   01 15 27.0   +07 18 15     2.622    2.363   64.1   22.0    68   14.1 

    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.