1991 TT
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Dec 2025	27.2	1.110 AU	0.565 AU	11h45m	-29°08'	87.2°	62.2°

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 1991 TT are:

            e (Eccentricity)                : 0.1616993
            a (Semimajor axis)              : 1.1948677
            i (Inclination)                 : 14.78158
            Ω (Longitude of ascending node) : 192.31022
            ω (Argument of perihelion)      : 218.07009
            M (Mean anomaly)                : 27.71753
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 229.44818
            B (Latitude of perihelion)      : -9.05152
            P (Orbital period in years)     : 1.31            
        

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
2025-12-28 00:00 UT   11 45 23.2   -29 08 19     0.565    1.110   87.2   62.2   295   27.2 
2025-12-28 14:06 UT   11 46 42.2   -29 15 53     0.564    1.112   87.4   62.1   295   27.2 
2025-12-29 00:00 UT   11 47 37.4   -29 21 08     0.563    1.113   87.6   62.0   295   27.2 
2025-12-30 00:00 UT   11 49 50.4   -29 33 38     0.562    1.115   88.0   61.8   296   27.2 
2025-12-31 00:00 UT   11 52 02.4   -29 45 48     0.560    1.117   88.3   61.6   296   27.2 
2026-01-01 00:00 UT   11 54 13.2   -29 57 39     0.558    1.120   88.7   61.4   296   27.2 
2026-01-02 00:00 UT   11 56 22.9   -30 09 10     0.557    1.122   89.1   61.2   296   27.2 
2026-01-03 00:00 UT   11 58 31.4   -30 20 22     0.555    1.125   89.5   60.9   296   27.2 
2026-01-04 00:00 UT   12 00 38.7   -30 31 14     0.553    1.128   89.9   60.7   297   27.1 
2026-01-05 00:00 UT   12 02 44.7   -30 41 46     0.551    1.130   90.4   60.5   297   27.1 
2026-01-06 00:00 UT   12 04 49.5   -30 51 58     0.549    1.133   90.8   60.2   297   27.1 
2026-01-07 00:00 UT   12 06 52.9   -31 01 50     0.547    1.135   91.2   60.0   297   27.1 
2026-01-08 00:00 UT   12 08 55.0   -31 11 20     0.544    1.138   91.7   59.8   297   27.1 
2026-01-09 00:00 UT   12 10 55.7   -31 20 30     0.542    1.140   92.1   59.5   298   27.1 
2026-01-10 00:00 UT   12 12 54.9   -31 29 19     0.540    1.143   92.6   59.3   298   27.1 
2026-01-11 00:00 UT   12 14 52.6   -31 37 45     0.537    1.145   93.0   59.0   298   27.1 
2026-01-12 00:00 UT   12 16 48.7   -31 45 50     0.535    1.148   93.5   58.8   298   27.1 
2026-01-13 00:00 UT   12 18 43.3   -31 53 32     0.532    1.151   94.0   58.5   299   27.0 
2026-01-14 00:00 UT   12 20 36.1   -32 00 51     0.529    1.153   94.5   58.3   299   27.0 

    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.