(138) Tolosa
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Jul 2025	14.3	2.615 AU	3.578 AU	05h35m	+24°15'	15.7°	6.1°
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)                : 0.1617394
            a (Semimajor axis)              : 2.4499203
            i (Inclination)                 : 3.20150
            Ω (Longitude of ascending node) : 54.72186
            ω (Argument of perihelion)      : 260.83306
            M (Mean anomaly)                : 91.22316
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 135.54083
            B (Latitude of perihelion)      : -3.16057
            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
2025-07-02 00:00 UT   05 35 04.0   +24 15 03     3.578    2.615   15.7    6.1   271   14.3 
2025-07-02 00:55 UT   05 35 08.2   +24 15 07     3.578    2.615   15.8    6.1   271   14.3 
2025-07-03 00:00 UT   05 36 54.2   +24 16 40     3.576    2.616   16.3    6.3   271   14.4 
2025-07-04 00:00 UT   05 38 44.3   +24 18 11     3.574    2.618   16.8    6.5   271   14.4 
2025-07-05 00:00 UT   05 40 34.3   +24 19 39     3.572    2.619   17.3    6.6   271   14.4 
2025-07-06 00:00 UT   05 42 24.1   +24 21 01     3.569    2.621   17.9    6.8   271   14.4 
2025-07-07 00:00 UT   05 44 13.7   +24 22 19     3.567    2.622   18.4    7.0   271   14.4 
2025-07-08 00:00 UT   05 46 03.1   +24 23 32     3.564    2.624   19.0    7.2   272   14.4 
2025-07-09 00:00 UT   05 47 52.4   +24 24 40     3.561    2.625   19.5    7.4   272   14.4 
2025-07-10 00:00 UT   05 49 41.5   +24 25 44     3.558    2.627   20.0    7.6   272   14.4 
2025-07-11 00:00 UT   05 51 30.5   +24 26 43     3.555    2.628   20.6    7.8   272   14.4 
2025-07-12 00:00 UT   05 53 19.2   +24 27 37     3.552    2.630   21.1    8.0   272   14.4 
2025-07-13 00:00 UT   05 55 07.8   +24 28 27     3.549    2.631   21.7    8.2   272   14.4 
2025-07-14 00:00 UT   05 56 56.2   +24 29 13     3.545    2.633   22.2    8.4   272   14.5 
2025-07-15 00:00 UT   05 58 44.4   +24 29 54     3.542    2.634   22.7    8.6   272   14.5 
2025-07-16 00:00 UT   06 00 32.3   +24 30 30     3.538    2.635   23.3    8.8   273   14.5 
2025-07-17 00:00 UT   06 02 20.1   +24 31 02     3.534    2.637   23.8    9.0   273   14.5 
2025-07-18 00:00 UT   06 04 07.7   +24 31 30     3.530    2.638   24.4    9.1   273   14.5 
2025-07-19 00:00 UT   06 05 55.1   +24 31 53     3.526    2.640   24.9    9.3   273   14.5 
2025-07-20 00:00 UT   06 07 42.2   +24 32 12     3.522    2.641   25.5    9.5   273   14.5 
2025-07-21 00:00 UT   06 09 29.1   +24 32 26     3.518    2.643   26.0    9.7   273   14.5 
2025-07-22 00:00 UT   06 11 15.8   +24 32 37     3.513    2.644   26.6    9.9   273   14.5 

    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.