(250) Bettina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Sep 2025	12.3	3.070 AU	2.129 AU	01h18m	+04°01'	155.1°	7.9°
Opposition	8 Oct 2025	11.8	3.043 AU	2.044 AU	01h01m	+03°33'	177.1°	0.9°

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 Bettina are:

            e (Eccentricity)                : 0.1368987
            a (Semimajor axis)              : 3.1417869
            i (Inclination)                 : 12.82079
            Ω (Longitude of ascending node) : 23.78864
            ω (Argument of perihelion)      : 75.91205
            M (Mean anomaly)                : 263.26421
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 99.35535
            B (Latitude of perihelion)      : 12.42892
            P (Orbital period in years)     : 5.57            
        

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
2025-09-18 00:00 UT   01 18 16.3   +04 01 59     2.129    3.070  155.1    7.9   256   12.3 
2025-09-18 01:12 UT   01 18 14.3   +04 01 56     2.129    3.070  155.2    7.9   256   12.3 
2025-09-19 00:00 UT   01 17 35.7   +04 00 54     2.122    3.069  156.2    7.6   257   12.3 
2025-09-20 00:00 UT   01 16 54.0   +03 59 46     2.116    3.067  157.4    7.2   257   12.3 
2025-09-21 00:00 UT   01 16 11.4   +03 58 36     2.110    3.066  158.5    6.9   258   12.2 
2025-09-22 00:00 UT   01 15 27.9   +03 57 22     2.104    3.065  159.7    6.5   258   12.2 
2025-09-23 00:00 UT   01 14 43.5   +03 56 06     2.098    3.063  160.8    6.2   258   12.2 
2025-09-24 00:00 UT   01 13 58.2   +03 54 47     2.092    3.062  162.0    5.8   259   12.2 
2025-09-25 00:00 UT   01 13 12.2   +03 53 26     2.087    3.061  163.1    5.5   260   12.2 
2025-09-26 00:00 UT   01 12 25.4   +03 52 03     2.082    3.059  164.3    5.1   260   12.1 
2025-09-27 00:00 UT   01 11 37.9   +03 50 39     2.077    3.058  165.4    4.7   261   12.1 
2025-09-28 00:00 UT   01 10 49.7   +03 49 13     2.073    3.057  166.6    4.4   262   12.1 
2025-09-29 00:00 UT   01 10 00.9   +03 47 45     2.069    3.055  167.7    4.0   263   12.1 
2025-09-30 00:00 UT   01 09 11.5   +03 46 17     2.065    3.054  168.9    3.6   265   12.0 
2025-10-01 00:00 UT   01 08 21.6   +03 44 47     2.062    3.053  170.0    3.3   266   12.0 
2025-10-02 00:00 UT   01 07 31.2   +03 43 17     2.058    3.051  171.1    2.9   269   12.0 
2025-10-03 00:00 UT   01 06 40.3   +03 41 46     2.055    3.050  172.3    2.5   271   11.9 
2025-10-04 00:00 UT   01 05 49.1   +03 40 15     2.053    3.049  173.3    2.2   275   11.9 
2025-10-05 00:00 UT   01 04 57.6   +03 38 44     2.050    3.047  174.4    1.8   280   11.9 
2025-10-06 00:00 UT   01 04 05.7   +03 37 13     2.048    3.046  175.4    1.5   288   11.9 
2025-10-07 00:00 UT   01 03 13.7   +03 35 42     2.047    3.045  176.3    1.2   299   11.8 
2025-10-08 00:00 UT   01 02 21.4   +03 34 12     2.045    3.043  176.9    1.0   316   11.8 
2025-10-09 00:00 UT   01 01 29.0   +03 32 43     2.044    3.042  177.2    0.9   339   11.8 
2025-10-10 00:00 UT   01 00 36.5   +03 31 14     2.043    3.041  177.0    1.0     3   11.8 
2025-10-11 00:00 UT   00 59 44.0   +03 29 47     2.042    3.039  176.4    1.2    20   11.8 
2025-10-12 00:00 UT   00 58 51.4   +03 28 21     2.042    3.038  175.5    1.5    32   11.8 
2025-10-13 00:00 UT   00 57 59.0   +03 26 57     2.042    3.037  174.5    1.8    40   11.9 
2025-10-14 00:00 UT   00 57 06.6   +03 25 35     2.042    3.035  173.4    2.2    45   11.9 
2025-10-15 00:00 UT   00 56 14.5   +03 24 15     2.043    3.034  172.3    2.5    49   11.9 
2025-10-16 00:00 UT   00 55 22.5   +03 22 57     2.044    3.033  171.2    2.9    52   11.9 
2025-10-17 00:00 UT   00 54 30.8   +03 21 42     2.045    3.031  170.1    3.3    54   12.0 
2025-10-18 00:00 UT   00 53 39.5   +03 20 29     2.046    3.030  168.9    3.6    56   12.0 

    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.