(516) Amherstia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Jun 2025	11.5	2.168 AU	1.281 AU	20h37m	-33°58'	141.2°	17.1°
Opposition	18 Jul 2025	11.1	2.251 AU	1.248 AU	20h06m	-33°17'	167.2°	5.7°

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 Amherstia are:

            e (Eccentricity)                : 0.2755977
            a (Semimajor axis)              : 2.6779666
            i (Inclination)                 : 12.95375
            Ω (Longitude of ascending node) : 328.71370
            ω (Argument of perihelion)      : 258.07553
            M (Mean anomaly)                : 24.99157
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 46.48710
            B (Latitude of perihelion)      : -12.66952
            P (Orbital period in years)     : 4.38            
        

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
2025-06-18 00:00 UT   20 37 22.5   -33 58 56     1.281    2.168  141.2   17.1   274   11.5 
2025-06-18 06:21 UT   20 37 13.3   -33 59 00     1.280    2.169  141.4   17.0   274   11.5 
2025-06-19 00:00 UT   20 36 46.9   -33 59 10     1.277    2.171  142.1   16.7   275   11.5 
2025-06-20 00:00 UT   20 36 09.1   -33 59 21     1.273    2.173  143.1   16.3   276   11.4 
2025-06-21 00:00 UT   20 35 29.0   -33 59 28     1.269    2.176  144.1   15.9   277   11.4 
2025-06-22 00:00 UT   20 34 46.7   -33 59 33     1.266    2.179  145.1   15.5   277   11.4 
2025-06-23 00:00 UT   20 34 02.2   -33 59 33     1.262    2.181  146.1   15.0   278   11.4 
2025-06-24 00:00 UT   20 33 15.6   -33 59 29     1.259    2.184  147.1   14.6   279   11.4 
2025-06-25 00:00 UT   20 32 27.0   -33 59 20     1.256    2.186  148.2   14.2   280   11.4 
2025-06-26 00:00 UT   20 31 36.3   -33 59 05     1.253    2.189  149.2   13.8   281   11.3 
2025-06-27 00:00 UT   20 30 43.7   -33 58 45     1.251    2.192  150.2   13.3   282   11.3 
2025-06-28 00:00 UT   20 29 49.2   -33 58 19     1.248    2.194  151.2   12.9   284   11.3 
2025-06-29 00:00 UT   20 28 52.9   -33 57 47     1.246    2.197  152.2   12.5   285   11.3 
2025-06-30 00:00 UT   20 27 54.9   -33 57 07     1.244    2.200  153.2   12.0   286   11.3 
2025-07-01 00:00 UT   20 26 55.3   -33 56 20     1.242    2.202  154.2   11.6   288   11.3 
2025-07-02 00:00 UT   20 25 54.1   -33 55 26     1.241    2.205  155.1   11.2   289   11.2 
2025-07-03 00:00 UT   20 24 51.4   -33 54 23     1.240    2.208  156.1   10.7   291   11.2 
2025-07-04 00:00 UT   20 23 47.3   -33 53 12     1.238    2.211  157.1   10.3   293   11.2 
2025-07-05 00:00 UT   20 22 42.0   -33 51 52     1.238    2.213  158.0    9.9   295   11.2 
2025-07-06 00:00 UT   20 21 35.4   -33 50 23     1.237    2.216  159.0    9.5   297   11.2 
2025-07-07 00:00 UT   20 20 27.8   -33 48 44     1.236    2.219  159.9    9.1   299   11.2 
2025-07-08 00:00 UT   20 19 19.1   -33 46 56     1.236    2.221  160.8    8.7   301   11.1 
2025-07-09 00:00 UT   20 18 09.5   -33 44 58     1.236    2.224  161.6    8.3   304   11.1 
2025-07-10 00:00 UT   20 16 59.0   -33 42 50     1.236    2.227  162.5    7.9   307   11.1 
2025-07-11 00:00 UT   20 15 47.9   -33 40 32     1.237    2.230  163.3    7.5   310   11.1 
2025-07-12 00:00 UT   20 14 36.1   -33 38 04     1.238    2.233  164.0    7.2   313   11.1 
2025-07-13 00:00 UT   20 13 23.8   -33 35 25     1.239    2.235  164.7    6.9   317   11.1 
2025-07-14 00:00 UT   20 12 11.1   -33 32 35     1.240    2.238  165.3    6.6   321   11.1 
2025-07-15 00:00 UT   20 10 58.0   -33 29 35     1.241    2.241  165.9    6.3   326   11.1 
2025-07-16 00:00 UT   20 09 44.8   -33 26 23     1.243    2.244  166.4    6.1   330   11.1 
2025-07-17 00:00 UT   20 08 31.4   -33 23 01     1.245    2.246  166.8    5.9   335   11.1 
2025-07-18 00:00 UT   20 07 18.0   -33 19 28     1.247    2.249  167.1    5.8   341   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.