A858 BA
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	14 Jan 2025	10.6	2.286 AU	1.323 AU	07h34m	+06°07'	164.7°	6.5°
Today	22 Jan 2025	10.6	2.281 AU	1.324 AU	07h26m	+06°48'	162.3°	7.5°

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 A858 BA are:

            e (Eccentricity)                : 0.0674647
            a (Semimajor axis)              : 2.3652141
            i (Inclination)                 : 9.97936
            Ω (Longitude of ascending node) : 175.95573
            ω (Argument of perihelion)      : 1.79714
            M (Mean anomaly)                : 61.95944
            Epoch                           : 2022 Aug 09

            L (Longitude of perihelion)     : 177.72570
            B (Latitude of perihelion)      : 0.31138
            P (Orbital period in years)     : 3.64            
        

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
2025-01-22 00:00 UT   07 26 58.0   +06 48 20     1.324    2.281  162.3    7.5    42   10.6 
2025-01-22 05:11 UT   07 26 45.6   +06 49 38     1.324    2.281  162.2    7.6    42   10.6 
2025-01-23 00:00 UT   07 26 00.7   +06 54 24     1.325    2.281  161.7    7.8    45   10.6 
2025-01-24 00:00 UT   07 25 04.2   +07 00 37     1.327    2.280  161.0    8.1    48   10.6 
2025-01-25 00:00 UT   07 24 08.5   +07 06 58     1.328    2.279  160.2    8.4    51   10.7 
2025-01-26 00:00 UT   07 23 13.6   +07 13 27     1.330    2.279  159.4    8.7    54   10.7 
2025-01-27 00:00 UT   07 22 19.8   +07 20 03     1.333    2.278  158.6    9.1    57   10.7 
2025-01-28 00:00 UT   07 21 27.0   +07 26 46     1.335    2.277  157.7    9.4    59   10.7 
2025-01-29 00:00 UT   07 20 35.3   +07 33 36     1.338    2.277  156.8    9.8    61   10.7 
2025-01-30 00:00 UT   07 19 44.8   +07 40 31     1.341    2.276  155.9   10.2    63   10.7 
2025-01-31 00:00 UT   07 18 55.6   +07 47 33     1.344    2.275  154.9   10.6    65   10.8 
2025-02-01 00:00 UT   07 18 07.8   +07 54 40     1.348    2.275  154.0   11.0    67   10.8 
2025-02-02 00:00 UT   07 17 21.3   +08 01 51     1.352    2.274  153.0   11.3    68   10.8 
2025-02-03 00:00 UT   07 16 36.3   +08 09 07     1.356    2.273  152.0   11.7    70   10.8 
2025-02-04 00:00 UT   07 15 52.8   +08 16 27     1.360    2.273  151.0   12.1    71   10.9 
2025-02-05 00:00 UT   07 15 11.0   +08 23 50     1.364    2.272  150.0   12.5    72   10.9 
2025-02-06 00:00 UT   07 14 30.7   +08 31 16     1.369    2.272  149.0   12.9    74   10.9 
2025-02-07 00:00 UT   07 13 52.1   +08 38 45     1.374    2.271  147.9   13.3    75   10.9 
2025-02-08 00:00 UT   07 13 15.2   +08 46 16     1.379    2.270  146.9   13.7    76   10.9 
2025-02-09 00:00 UT   07 12 40.0   +08 53 49     1.384    2.270  145.9   14.1    77   11.0 
2025-02-10 00:00 UT   07 12 06.7   +09 01 24     1.390    2.269  144.9   14.5    78   11.0 
2025-02-11 00:00 UT   07 11 35.1   +09 08 60     1.396    2.268  143.8   14.9    79   11.0 
2025-02-12 00:00 UT   07 11 05.4   +09 16 36     1.402    2.268  142.8   15.3    79   11.0 
2025-02-13 00:00 UT   07 10 37.6   +09 24 13     1.408    2.267  141.8   15.6    80   11.0 
2025-02-14 00:00 UT   07 10 11.6   +09 31 50     1.414    2.267  140.7   16.0    81   11.1 
2025-02-15 00:00 UT   07 09 47.5   +09 39 27     1.421    2.266  139.7   16.4    82   11.1 
2025-02-16 00:00 UT   07 09 25.4   +09 47 03     1.427    2.265  138.7   16.7    82   11.1 
2025-02-17 00:00 UT   07 09 05.3   +09 54 38     1.434    2.265  137.7   17.1    83   11.1 
2025-02-18 00:00 UT   07 08 47.1   +10 02 13     1.441    2.264  136.6   17.4    83   11.2 
2025-02-19 00:00 UT   07 08 30.8   +10 09 45     1.449    2.263  135.6   17.8    84   11.2 
2025-02-20 00:00 UT   07 08 16.6   +10 17 17     1.456    2.263  134.6   18.1    85   11.2 
2025-02-21 00:00 UT   07 08 04.4   +10 24 46     1.464    2.262  133.6   18.4    85   11.2 

    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.