(516) Amherstia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 May 2025	11.8	2.118 AU	1.393 AU	20h40m	-33°53'	122.5°	23.8°
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
2025-05-29 00:00 UT   20 40 46.0   -33 53 28     1.393    2.118  122.5   23.8   264   11.8 
2025-05-29 02:05 UT   20 40 47.2   -33 53 28     1.392    2.118  122.6   23.8   264   11.8 
2025-05-30 00:00 UT   20 40 59.1   -33 53 30     1.386    2.121  123.4   23.5   265   11.8 
2025-05-31 00:00 UT   20 41 09.8   -33 53 35     1.380    2.123  124.3   23.2   265   11.8 
2025-06-01 00:00 UT   20 41 18.0   -33 53 42     1.373    2.125  125.2   23.0   265   11.8 
2025-06-02 00:00 UT   20 41 23.8   -33 53 52     1.367    2.128  126.1   22.7   266   11.8 
2025-06-03 00:00 UT   20 41 27.1   -33 54 04     1.360    2.130  127.0   22.4   266   11.7 
2025-06-04 00:00 UT   20 41 28.0   -33 54 18     1.354    2.133  127.9   22.1   267   11.7 
2025-06-05 00:00 UT   20 41 26.3   -33 54 34     1.348    2.135  128.8   21.7   267   11.7 
2025-06-06 00:00 UT   20 41 22.3   -33 54 52     1.342    2.138  129.7   21.4   267   11.7 
2025-06-07 00:00 UT   20 41 15.7   -33 55 11     1.336    2.140  130.6   21.1   268   11.7 
2025-06-08 00:00 UT   20 41 06.7   -33 55 32     1.331    2.143  131.5   20.8   268   11.7 
2025-06-09 00:00 UT   20 40 55.3   -33 55 53     1.325    2.145  132.5   20.4   269   11.6 
2025-06-10 00:00 UT   20 40 41.3   -33 56 15     1.319    2.148  133.4   20.1   269   11.6 
2025-06-11 00:00 UT   20 40 24.9   -33 56 37     1.314    2.150  134.4   19.7   270   11.6 
2025-06-12 00:00 UT   20 40 06.1   -33 56 59     1.309    2.153  135.3   19.4   270   11.6 
2025-06-13 00:00 UT   20 39 44.8   -33 57 21     1.304    2.155  136.3   19.0   271   11.6 
2025-06-14 00:00 UT   20 39 21.1   -33 57 43     1.299    2.158  137.2   18.6   272   11.6 
2025-06-15 00:00 UT   20 38 55.1   -33 58 03     1.294    2.160  138.2   18.3   272   11.5 
2025-06-16 00:00 UT   20 38 26.6   -33 58 23     1.290    2.163  139.2   17.9   273   11.5 
2025-06-17 00:00 UT   20 37 55.7   -33 58 40     1.285    2.166  140.2   17.5   274   11.5 
2025-06-18 00:00 UT   20 37 22.5   -33 58 56     1.281    2.168  141.2   17.1   274   11.5 
2025-06-19 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 

    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.