C/2020 O2 (Amaral)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	10 Jun 2021	15.4	4.894 AU	3.880 AU	16h59m	-22°33'	176.2°	0.8°	98°
Perihelion	27 Aug 2021	15.7	4.856 AU	4.682 AU	16h30m	-11°43'	93.9°	12.0°	100°
Today	4 Aug 2025	21.2	11.170 AU	11.142 AU	22h53m	+71°46'	88.9°	5.2°	207°

The interactive orbit chart above shows the comet'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 C/2020 O2 (Amaral) are:

            e (Eccentricity)                : 0.9995390
            q (Perihelion distance)         : 4.8562410
            i (Inclination)                 : 71.76240
            Ω (Longitude of ascending node) : 256.79100
            ω (Argument of perihelion)      : 10.16850
            L (Longitude of perihelion)     : 260.00378
            B (Latitude of perihelion)      : 9.65268
            T (Time of perihelion passage)  : 2459453.72730

            Epoch                           : 2025 Aug 03
            Reference                       : MPEC 2024-JU4

            Classification(s):              : Nearly isotropic; New (a > 10000 AU)
        

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (8.00 + 5 log[∆] + 8.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 5.52 + 5 log[∆] + 10.00 log[r]).

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found further down this page as well.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-08-04 00:00 UT   22 53 44.6   +71 45 32    11.143   11.167   88.7    5.2   208   21.2 
2025-08-04 12:35 UT   22 53 25.7   +71 46 46    11.142   11.170   88.9    5.2   207   21.2 
2025-08-05 00:00 UT   22 53 08.4   +71 47 51    11.142   11.172   89.1    5.2   207   21.2 
2025-08-06 00:00 UT   22 52 31.5   +71 50 06    11.140   11.178   89.5    5.2   206   21.2 
2025-08-07 00:00 UT   22 51 54.0   +71 52 16    11.139   11.183   89.9    5.2   205   21.2 
2025-08-08 00:00 UT   22 51 15.9   +71 54 20    11.138   11.189   90.3    5.2   204   21.2 
2025-08-09 00:00 UT   22 50 37.1   +71 56 19    11.136   11.194   90.7    5.2   203   21.2 
2025-08-10 00:00 UT   22 49 57.8   +71 58 13    11.135   11.200   91.0    5.2   202   21.2 
2025-08-11 00:00 UT   22 49 17.9   +72 00 01    11.133   11.205   91.4    5.2   201   21.2 
2025-08-12 00:00 UT   22 48 37.5   +72 01 44    11.132   11.211   91.8    5.2   200   21.2 
2025-08-13 00:00 UT   22 47 56.5   +72 03 22    11.131   11.216   92.2    5.2   199   21.3 
2025-08-14 00:00 UT   22 47 15.0   +72 04 54    11.130   11.222   92.6    5.2   198   21.3 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet 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-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or 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.