(172) Baucis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	24 Jul 2025	11.0	2.137 AU	1.129 AU	20h25m	-29°10'	170.3°	4.6°
Today	15 Sep 2025	12.2	2.113 AU	1.384 AU	19h53m	-24°23'	123.5°	23.4°

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 Baucis are:

            e (Eccentricity)                : 0.1142571
            a (Semimajor axis)              : 2.3800398
            i (Inclination)                 : 10.01529
            Ω (Longitude of ascending node) : 331.89122
            ω (Argument of perihelion)      : 359.20037
            M (Mean anomaly)                : 314.60480
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 331.10377
            B (Latitude of perihelion)      : -0.13906
            P (Orbital period in years)     : 3.67            
        

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
2025-09-15 00:00 UT   19 53 16.1   -24 23 33     1.384    2.113  123.5   23.4    77   12.2 
2025-09-15 21:16 UT   19 53 30.7   -24 16 55     1.392    2.113  122.7   23.6    77   12.2 
2025-09-16 00:00 UT   19 53 32.7   -24 16 04     1.393    2.113  122.6   23.6    77   12.2 
2025-09-17 00:00 UT   19 53 51.4   -24 08 34     1.403    2.113  121.8   23.9    77   12.2 
2025-09-18 00:00 UT   19 54 12.0   -24 01 02     1.412    2.112  120.9   24.1    77   12.2 
2025-09-19 00:00 UT   19 54 34.7   -23 53 30     1.422    2.112  120.0   24.3    77   12.2 
2025-09-20 00:00 UT   19 54 59.3   -23 45 55     1.432    2.112  119.2   24.5    77   12.3 
2025-09-21 00:00 UT   19 55 25.9   -23 38 20     1.441    2.112  118.3   24.7    77   12.3 
2025-09-22 00:00 UT   19 55 54.4   -23 30 43     1.451    2.111  117.5   25.0    77   12.3 
2025-09-23 00:00 UT   19 56 24.8   -23 23 05     1.461    2.111  116.6   25.1    78   12.3 
2025-09-24 00:00 UT   19 56 57.1   -23 15 25     1.471    2.111  115.8   25.3    78   12.3 
2025-09-25 00:00 UT   19 57 31.2   -23 07 44     1.481    2.111  115.0   25.5    78   12.4 
2025-09-26 00:00 UT   19 58 07.2   -23 00 02     1.491    2.110  114.2   25.7    78   12.4 
2025-09-27 00:00 UT   19 58 44.9   -22 52 19     1.502    2.110  113.4   25.9    78   12.4 
2025-09-28 00:00 UT   19 59 24.4   -22 44 34     1.512    2.110  112.6   26.0    78   12.4 
2025-09-29 00:00 UT   20 00 05.6   -22 36 48     1.522    2.110  111.8   26.2    78   12.4 
2025-09-30 00:00 UT   20 00 48.5   -22 28 60     1.533    2.110  111.0   26.3    78   12.5 
2025-10-01 00:00 UT   20 01 33.1   -22 21 11     1.543    2.110  110.2   26.5    78   12.5 
2025-10-02 00:00 UT   20 02 19.2   -22 13 21     1.554    2.109  109.4   26.6    78   12.5 
2025-10-03 00:00 UT   20 03 07.0   -22 05 29     1.565    2.109  108.6   26.7    78   12.5 
2025-10-04 00:00 UT   20 03 56.3   -21 57 36     1.575    2.109  107.8   26.8    78   12.5 
2025-10-05 00:00 UT   20 04 47.2   -21 49 41     1.586    2.109  107.1   27.0    78   12.6 
2025-10-06 00:00 UT   20 05 39.6   -21 41 45     1.597    2.109  106.3   27.1    78   12.6 
2025-10-07 00:00 UT   20 06 33.4   -21 33 47     1.608    2.109  105.6   27.2    78   12.6 
2025-10-08 00:00 UT   20 07 28.6   -21 25 48     1.619    2.109  104.8   27.3    78   12.6 
2025-10-09 00:00 UT   20 08 25.3   -21 17 47     1.630    2.109  104.1   27.4    78   12.6 
2025-10-10 00:00 UT   20 09 23.3   -21 09 44     1.641    2.109  103.3   27.4    77   12.6 
2025-10-11 00:00 UT   20 10 22.7   -21 01 40     1.652    2.108  102.6   27.5    77   12.7 
2025-10-12 00:00 UT   20 11 23.4   -20 53 34     1.663    2.108  101.9   27.6    77   12.7 
2025-10-13 00:00 UT   20 12 25.4   -20 45 26     1.674    2.108  101.2   27.7    77   12.7 
2025-10-14 00:00 UT   20 13 28.7   -20 37 16     1.685    2.108  100.4   27.7    77   12.7 
2025-10-15 00:00 UT   20 14 33.3   -20 29 04     1.697    2.108   99.7   27.8    77   12.7 

    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.