C/2019 G4 (PANSTARRS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	15 Sep 2018	21.3	5.846 AU	6.591 AU	11h44m	-36°02'	39.2°	6.2°	175°
Nearest approach	15 Mar 2019	20.8	5.986 AU	5.180 AU	10h41m	-34°12'	141.1°	6.0°	24°
Today	2 Jul 2025	27.8	16.318 AU	17.264 AU	07h09m	+43°17'	20.9°	1.3°	16°

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/2019 G4 (PANSTARRS) are:

            e (Eccentricity)                : 1.0014040
            q (Perihelion distance)         : 5.8459890
            i (Inclination)                 : 138.33930
            Ω (Longitude of ascending node) : 130.44350
            ω (Argument of perihelion)      : 287.72700
            L (Longitude of perihelion)     : 197.27882
            B (Latitude of perihelion)      : -39.28335
            T (Time of perihelion passage)  : 2458376.97140

            Epoch                           : 2023 Sep 24
            Reference                       : MPEC 2022-P82

            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. (9.50 + 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   07 09 05.6   +43 17 22    17.263   16.318   20.9    1.3    17   27.8 
2025-07-02 01:27 UT   07 09 06.5   +43 17 22    17.264   16.318   20.9    1.3    16   27.8 
2025-07-03 00:00 UT   07 09 21.0   +43 17 24    17.269   16.323   20.8    1.3    14   27.8 
2025-07-04 00:00 UT   07 09 36.5   +43 17 27    17.274   16.328   20.7    1.3    12   27.8 
2025-07-05 00:00 UT   07 09 52.0   +43 17 31    17.279   16.333   20.7    1.3     9   27.8 
2025-07-06 00:00 UT   07 10 07.5   +43 17 36    17.284   16.337   20.7    1.3     7   27.8 
2025-07-07 00:00 UT   07 10 23.0   +43 17 42    17.289   16.342   20.7    1.3     4   27.8 
2025-07-08 00:00 UT   07 10 38.5   +43 17 49    17.293   16.347   20.8    1.3     1   27.8 
2025-07-09 00:00 UT   07 10 54.0   +43 17 57    17.297   16.352   20.9    1.3   359   27.8 
2025-07-10 00:00 UT   07 11 09.5   +43 18 06    17.301   16.357   21.1    1.3   357   27.8 
2025-07-11 00:00 UT   07 11 25.0   +43 18 17    17.304   16.362   21.2    1.3   354   27.8 
2025-07-12 00:00 UT   07 11 40.5   +43 18 28    17.308   16.366   21.5    1.3   352   27.8 

    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.