(250) Bettina
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jul 2025	13.4	3.152 AU	2.872 AU	01h21m	+02°38'	96.4°	18.7°
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
2025-07-19 00:00 UT   01 21 32.0   +02 38 27     2.872    3.152   96.4   18.7   249   13.4 
2025-07-19 05:33 UT   01 21 39.2   +02 39 22     2.869    3.151   96.6   18.7   249   13.4 
2025-07-20 00:00 UT   01 22 02.9   +02 42 23     2.857    3.150   97.2   18.7   249   13.4 
2025-07-21 00:00 UT   01 22 32.8   +02 46 14     2.842    3.149   98.0   18.6   249   13.4 
2025-07-22 00:00 UT   01 23 01.8   +02 50 01     2.827    3.148   98.8   18.6   249   13.4 
2025-07-23 00:00 UT   01 23 29.9   +02 53 42     2.812    3.146   99.6   18.6   249   13.4 
2025-07-24 00:00 UT   01 23 57.0   +02 57 18     2.798    3.145  100.5   18.5   249   13.4 
2025-07-25 00:00 UT   01 24 23.1   +03 00 50     2.783    3.144  101.3   18.5   249   13.3 
2025-07-26 00:00 UT   01 24 48.2   +03 04 16     2.768    3.142  102.1   18.4   249   13.3 
2025-07-27 00:00 UT   01 25 12.4   +03 07 37     2.753    3.141  103.0   18.4   249   13.3 
2025-07-28 00:00 UT   01 25 35.5   +03 10 54     2.738    3.140  103.8   18.3   249   13.3 
2025-07-29 00:00 UT   01 25 57.6   +03 14 05     2.724    3.138  104.7   18.2   250   13.3 
2025-07-30 00:00 UT   01 26 18.6   +03 17 11     2.709    3.137  105.5   18.2   250   13.3 
2025-07-31 00:00 UT   01 26 38.6   +03 20 12     2.695    3.136  106.4   18.1   250   13.3 
2025-08-01 00:00 UT   01 26 57.6   +03 23 08     2.680    3.134  107.2   18.0   250   13.2 
2025-08-02 00:00 UT   01 27 15.4   +03 25 59     2.666    3.133  108.1   17.9   250   13.2 
2025-08-03 00:00 UT   01 27 32.2   +03 28 44     2.651    3.132  109.0   17.8   250   13.2 
2025-08-04 00:00 UT   01 27 47.9   +03 31 25     2.637    3.130  109.8   17.8   250   13.2 
2025-08-05 00:00 UT   01 28 02.4   +03 33 60     2.623    3.129  110.7   17.7   250   13.2 
2025-08-06 00:00 UT   01 28 15.8   +03 36 30     2.609    3.128  111.6   17.5   250   13.2 
2025-08-07 00:00 UT   01 28 28.1   +03 38 55     2.595    3.126  112.5   17.4   250   13.2 
2025-08-08 00:00 UT   01 28 39.3   +03 41 14     2.581    3.125  113.4   17.3   251   13.1 
2025-08-09 00:00 UT   01 28 49.2   +03 43 28     2.567    3.124  114.3   17.2   251   13.1 
2025-08-10 00:00 UT   01 28 58.0   +03 45 37     2.553    3.122  115.2   17.1   251   13.1 
2025-08-11 00:00 UT   01 29 05.6   +03 47 41     2.539    3.121  116.1   17.0   251   13.1 
2025-08-12 00:00 UT   01 29 12.1   +03 49 39     2.526    3.120  117.0   16.8   251   13.1 
2025-08-13 00:00 UT   01 29 17.3   +03 51 32     2.512    3.118  118.0   16.7   251   13.1 
2025-08-14 00:00 UT   01 29 21.2   +03 53 20     2.499    3.117  118.9   16.5   251   13.0 
2025-08-15 00:00 UT   01 29 24.0   +03 55 02     2.485    3.116  119.8   16.4   251   13.0 
2025-08-16 00:00 UT   01 29 25.5   +03 56 39     2.472    3.114  120.8   16.2   251   13.0 
2025-08-17 00:00 UT   01 29 25.7   +03 58 10     2.459    3.113  121.7   16.1   251   13.0 
2025-08-18 00:00 UT   01 29 24.7   +03 59 36     2.446    3.112  122.7   15.9   252   13.0 

    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.