(172) Baucis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jul 2025	11.1	2.141 AU	1.137 AU	20h32m	-29°18'	167.8°	5.8°
Opposition	24 Jul 2025	11.0	2.137 AU	1.129 AU	20h25m	-29°10'	170.3°	4.6°

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 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
2025-07-19 00:00 UT   20 32 07.9   -29 18 15     1.137    2.141  167.8    5.8   311   11.1 
2025-07-19 01:49 UT   20 32 02.8   -29 18 11     1.137    2.141  167.9    5.7   312   11.1 
2025-07-20 00:00 UT   20 31 00.1   -29 17 11     1.135    2.140  168.5    5.4   316   11.1 
2025-07-21 00:00 UT   20 29 51.5   -29 15 57     1.133    2.139  169.1    5.2   322   11.1 
2025-07-22 00:00 UT   20 28 42.4   -29 14 34     1.132    2.139  169.6    4.9   328   11.1 
2025-07-23 00:00 UT   20 27 32.8   -29 13 02     1.130    2.138  170.0    4.7   334   11.0 
2025-07-24 00:00 UT   20 26 22.8   -29 11 19     1.129    2.137  170.3    4.6   341   11.0 
2025-07-25 00:00 UT   20 25 12.5   -29 09 27     1.129    2.137  170.4    4.6   348   11.0 
2025-07-26 00:00 UT   20 24 02.1   -29 07 25     1.128    2.136  170.4    4.6   356   11.0 
2025-07-27 00:00 UT   20 22 51.7   -29 05 12     1.128    2.136  170.2    4.7     3   11.0 
2025-07-28 00:00 UT   20 21 41.3   -29 02 50     1.128    2.135  169.9    4.8    10   11.0 
2025-07-29 00:00 UT   20 20 31.1   -29 00 16     1.128    2.134  169.4    5.0    16   11.0 
2025-07-30 00:00 UT   20 19 21.2   -28 57 32     1.129    2.134  168.9    5.3    22   11.1 
2025-07-31 00:00 UT   20 18 11.7   -28 54 38     1.129    2.133  168.3    5.6    27   11.1 
2025-08-01 00:00 UT   20 17 02.8   -28 51 33     1.130    2.133  167.5    5.9    32   11.1 
2025-08-02 00:00 UT   20 15 54.4   -28 48 18     1.131    2.132  166.8    6.3    36   11.1 
2025-08-03 00:00 UT   20 14 46.8   -28 44 52     1.133    2.131  165.9    6.6    40   11.1 
2025-08-04 00:00 UT   20 13 40.0   -28 41 16     1.134    2.131  165.0    7.1    43   11.2 
2025-08-05 00:00 UT   20 12 34.1   -28 37 30     1.136    2.130  164.1    7.5    46   11.2 
2025-08-06 00:00 UT   20 11 29.2   -28 33 33     1.139    2.130  163.2    7.9    48   11.2 
2025-08-07 00:00 UT   20 10 25.5   -28 29 27     1.141    2.129  162.2    8.4    51   11.2 
2025-08-08 00:00 UT   20 09 22.9   -28 25 11     1.143    2.129  161.2    8.8    53   11.2 
2025-08-09 00:00 UT   20 08 21.6   -28 20 46     1.146    2.128  160.2    9.3    55   11.3 
2025-08-10 00:00 UT   20 07 21.7   -28 16 11     1.149    2.128  159.2    9.7    56   11.3 
2025-08-11 00:00 UT   20 06 23.2   -28 11 27     1.153    2.127  158.2   10.2    58   11.3 
2025-08-12 00:00 UT   20 05 26.2   -28 06 34     1.156    2.126  157.1   10.7    59   11.3 
2025-08-13 00:00 UT   20 04 30.8   -28 01 33     1.160    2.126  156.1   11.1    61   11.4 
2025-08-14 00:00 UT   20 03 37.0   -27 56 24     1.164    2.125  155.1   11.6    62   11.4 
2025-08-15 00:00 UT   20 02 45.0   -27 51 06     1.168    2.125  154.0   12.1    63   11.4 
2025-08-16 00:00 UT   20 01 54.7   -27 45 41     1.172    2.124  153.0   12.5    64   11.4 
2025-08-17 00:00 UT   20 01 06.2   -27 40 08     1.177    2.124  151.9   13.0    65   11.5 
2025-08-18 00:00 UT   20 00 19.6   -27 34 28     1.181    2.124  150.9   13.4    66   11.5 

    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.