C/2021 A6 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	3 Mar 2021	20.2	7.933 AU	6.966 AU	10h28m	-04°49'	166.3°	1.7°	33°
Perihelion	3 May 2021	20.4	7.925 AU	7.488 AU	10h15m	+01°38'	112.3°	6.8°	108°
Today	2 Jul 2025	23.2	11.917 AU	11.966 AU	14h13m	+51°35'	84.8°	4.9°	121°

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/2021 A6 (PANSTARRS) are:

            e (Eccentricity)                : 0.9993490
            q (Perihelion distance)         : 7.9247620
            i (Inclination)                 : 75.56370
            Ω (Longitude of ascending node) : 164.02530
            ω (Argument of perihelion)      : 351.62570
            L (Longitude of perihelion)     : 161.92351
            B (Latitude of perihelion)      : -8.10808
            T (Time of perihelion passage)  : 2459337.57460

            Epoch                           : 2025 Jun 30
            Reference                       : MPEC 2024-P23

            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 light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (7.00 + 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
2025-07-02 00:00 UT   14 13 00.3   +51 36 13    11.965   11.917   84.8    4.9   121   23.2 
2025-07-02 01:51 UT   14 13 00.1   +51 35 60    11.966   11.917   84.8    4.9   121   23.2 
2025-07-03 00:00 UT   14 12 57.6   +51 33 17    11.978   11.921   84.4    4.9   120   23.2 
2025-07-04 00:00 UT   14 12 55.4   +51 30 18    11.990   11.925   83.9    4.9   120   23.2 
2025-07-05 00:00 UT   14 12 53.6   +51 27 17    12.002   11.929   83.4    4.9   119   23.2 
2025-07-06 00:00 UT   14 12 52.3   +51 24 15    12.015   11.933   83.0    4.9   118   23.2 
2025-07-07 00:00 UT   14 12 51.5   +51 21 10    12.027   11.938   82.5    4.8   117   23.2 
2025-07-08 00:00 UT   14 12 51.1   +51 18 04    12.039   11.942   82.0    4.8   116   23.2 
2025-07-09 00:00 UT   14 12 51.2   +51 14 56    12.052   11.946   81.6    4.8   116   23.2 
2025-07-10 00:00 UT   14 12 51.8   +51 11 46    12.064   11.950   81.1    4.8   115   23.2 
2025-07-11 00:00 UT   14 12 52.8   +51 08 35    12.076   11.954   80.7    4.8   114   23.2 
2025-07-12 00:00 UT   14 12 54.3   +51 05 22    12.089   11.958   80.2    4.8   113   23.2 

    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.