(312) Pierretta
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Jul 2025	12.0	2.366 AU	1.371 AU	19h57m	-36°03'	164.7°	6.5°
Opposition	15 Jul 2025	12.0	2.367 AU	1.371 AU	19h55m	-36°05'	164.9°	6.4°

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 Pierretta are:

            e (Eccentricity)                : 0.1603277
            a (Semimajor axis)              : 2.7824813
            i (Inclination)                 : 9.03401
            Ω (Longitude of ascending node) : 6.20079
            ω (Argument of perihelion)      : 261.93787
            M (Mean anomaly)                : 2.92019
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 88.03875
            B (Latitude of perihelion)      : -8.94399
            P (Orbital period in years)     : 4.64            
        

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
2025-07-14 00:00 UT   19 57 19.0   -36 03 55     1.371    2.366  164.7    6.5   338   12.0 
2025-07-14 20:59 UT   19 56 25.1   -36 04 60     1.371    2.367  164.9    6.4   342   12.0 
2025-07-15 00:00 UT   19 56 17.3   -36 05 08     1.371    2.367  164.9    6.4   342   12.0 
2025-07-16 00:00 UT   19 55 15.4   -36 06 10     1.371    2.368  165.0    6.4   347   12.0 
2025-07-17 00:00 UT   19 54 13.2   -36 06 59     1.372    2.368  165.0    6.4   352   12.0 
2025-07-18 00:00 UT   19 53 11.0   -36 07 37     1.373    2.369  164.9    6.4   356   12.0 
2025-07-19 00:00 UT   19 52 08.9   -36 08 02     1.374    2.370  164.8    6.5     1   12.0 
2025-07-20 00:00 UT   19 51 06.8   -36 08 15     1.376    2.371  164.5    6.6     5   12.0 
2025-07-21 00:00 UT   19 50 04.9   -36 08 15     1.377    2.371  164.2    6.7     9   12.0 
2025-07-22 00:00 UT   19 49 03.3   -36 08 03     1.379    2.372  163.8    6.9    14   12.0 
2025-07-23 00:00 UT   19 48 02.1   -36 07 38     1.382    2.373  163.4    7.0    17   12.1 
2025-07-24 00:00 UT   19 47 01.4   -36 07 00     1.384    2.374  162.8    7.3    21   12.1 
2025-07-25 00:00 UT   19 46 01.3   -36 06 10     1.387    2.374  162.3    7.5    25   12.1 
2025-07-26 00:00 UT   19 45 01.8   -36 05 07     1.390    2.375  161.6    7.7    28   12.1 
2025-07-27 00:00 UT   19 44 03.1   -36 03 52     1.393    2.376  161.0    8.0    31   12.1 
2025-07-28 00:00 UT   19 43 05.3   -36 02 24     1.396    2.377  160.3    8.3    34   12.1 
2025-07-29 00:00 UT   19 42 08.5   -36 00 44     1.400    2.378  159.5    8.6    36   12.2 
2025-07-30 00:00 UT   19 41 12.6   -35 58 52     1.404    2.378  158.7    8.9    39   12.2 
2025-07-31 00:00 UT   19 40 17.9   -35 56 48     1.408    2.379  157.9    9.2    41   12.2 
2025-08-01 00:00 UT   19 39 24.3   -35 54 32     1.412    2.380  157.1    9.5    43   12.2 
2025-08-02 00:00 UT   19 38 32.0   -35 52 05     1.417    2.381  156.3    9.9    45   12.2 
2025-08-03 00:00 UT   19 37 41.0   -35 49 26     1.421    2.382  155.4   10.2    47   12.3 
2025-08-04 00:00 UT   19 36 51.4   -35 46 36     1.426    2.383  154.5   10.5    49   12.3 
2025-08-05 00:00 UT   19 36 03.2   -35 43 35     1.432    2.383  153.6   10.9    50   12.3 
2025-08-06 00:00 UT   19 35 16.5   -35 40 24     1.437    2.384  152.7   11.2    52   12.3 
2025-08-07 00:00 UT   19 34 31.4   -35 37 02     1.443    2.385  151.8   11.6    53   12.4 
2025-08-08 00:00 UT   19 33 47.8   -35 33 30     1.448    2.386  150.9   11.9    55   12.4 
2025-08-09 00:00 UT   19 33 06.0   -35 29 49     1.455    2.387  150.0   12.3    56   12.4 
2025-08-10 00:00 UT   19 32 25.7   -35 25 58     1.461    2.388  149.1   12.6    57   12.4 
2025-08-11 00:00 UT   19 31 47.3   -35 21 58     1.467    2.389  148.1   12.9    58   12.4 
2025-08-12 00:00 UT   19 31 10.5   -35 17 49     1.474    2.390  147.2   13.3    59   12.5 
2025-08-13 00:00 UT   19 30 35.6   -35 13 31     1.481    2.391  146.3   13.6    60   12.5 

    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.