(172) Baucis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Jun 2025	11.9	2.165 AU	1.312 AU	20h54m	-29°08'	136.6°	18.8°
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
2025-06-17 00:00 UT   20 54 40.1   -29 08 20     1.312    2.165  136.6   18.8   266   11.9 
2025-06-17 09:33 UT   20 54 36.2   -29 08 34     1.309    2.165  136.9   18.7   266   11.9 
2025-06-18 00:00 UT   20 54 29.6   -29 08 55     1.304    2.165  137.5   18.5   266   11.9 
2025-06-19 00:00 UT   20 54 16.8   -29 09 33     1.295    2.164  138.5   18.1   267   11.9 
2025-06-20 00:00 UT   20 54 01.8   -29 10 12     1.287    2.163  139.5   17.8   267   11.9 
2025-06-21 00:00 UT   20 53 44.5   -29 10 54     1.280    2.162  140.4   17.4   268   11.8 
2025-06-22 00:00 UT   20 53 25.0   -29 11 37     1.272    2.161  141.4   17.1   268   11.8 
2025-06-23 00:00 UT   20 53 03.2   -29 12 21     1.264    2.160  142.4   16.7   269   11.8 
2025-06-24 00:00 UT   20 52 39.1   -29 13 05     1.257    2.159  143.4   16.3   269   11.8 
2025-06-25 00:00 UT   20 52 12.9   -29 13 51     1.250    2.159  144.4   15.9   270   11.7 
2025-06-26 00:00 UT   20 51 44.4   -29 14 37     1.243    2.158  145.4   15.5   271   11.7 
2025-06-27 00:00 UT   20 51 13.7   -29 15 22     1.236    2.157  146.4   15.1   271   11.7 
2025-06-28 00:00 UT   20 50 40.8   -29 16 07     1.229    2.156  147.4   14.7   272   11.7 
2025-06-29 00:00 UT   20 50 05.8   -29 16 51     1.223    2.155  148.4   14.3   273   11.6 
2025-06-30 00:00 UT   20 49 28.7   -29 17 34     1.216    2.155  149.4   13.9   274   11.6 
2025-07-01 00:00 UT   20 48 49.5   -29 18 15     1.210    2.154  150.5   13.5   274   11.6 
2025-07-02 00:00 UT   20 48 08.3   -29 18 54     1.204    2.153  151.5   13.0   275   11.5 
2025-07-03 00:00 UT   20 47 25.1   -29 19 31     1.199    2.152  152.5   12.6   276   11.5 
2025-07-04 00:00 UT   20 46 39.9   -29 20 05     1.193    2.152  153.5   12.2   277   11.5 
2025-07-05 00:00 UT   20 45 52.8   -29 20 35     1.188    2.151  154.6   11.7   278   11.5 
2025-07-06 00:00 UT   20 45 03.9   -29 21 01     1.183    2.150  155.6   11.3   280   11.4 
2025-07-07 00:00 UT   20 44 13.2   -29 21 24     1.178    2.149  156.6   10.8   281   11.4 
2025-07-08 00:00 UT   20 43 20.7   -29 21 42     1.173    2.149  157.6   10.4   282   11.4 
2025-07-09 00:00 UT   20 42 26.5   -29 21 55     1.169    2.148  158.6    9.9   284   11.4 
2025-07-10 00:00 UT   20 41 30.8   -29 22 03     1.165    2.147  159.6    9.5   285   11.3 
2025-07-11 00:00 UT   20 40 33.4   -29 22 05     1.161    2.146  160.6    9.0   287   11.3 
2025-07-12 00:00 UT   20 39 34.6   -29 22 01     1.157    2.146  161.6    8.6   289   11.3 
2025-07-13 00:00 UT   20 38 34.4   -29 21 51     1.153    2.145  162.6    8.1   291   11.2 
2025-07-14 00:00 UT   20 37 32.9   -29 21 34     1.150    2.144  163.6    7.7   294   11.2 
2025-07-15 00:00 UT   20 36 30.0   -29 21 10     1.147    2.144  164.5    7.3   297   11.2 
2025-07-16 00:00 UT   20 35 26.0   -29 20 38     1.144    2.143  165.4    6.9   300   11.2 
2025-07-17 00:00 UT   20 34 21.0   -29 19 59     1.141    2.142  166.2    6.5   303   11.1 

    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.