A/2019 G3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	3 Dec 2018	22.6	2.836 AU	3.814 AU	16h28m	-16°25'	6.2°	2.1°	338°
Nearest approach	17 Apr 2019	21.7	3.099 AU	2.116 AU	14h05m	-23°13'	165.9°	4.5°	334°
Today	14 Jul 2025	29.2	14.833 AU	15.788 AU	06h58m	+04°33'	19.4°	1.3°	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 A/2019 G3 are:

            e (Eccentricity)                : 0.8342490
            q (Perihelion distance)         : 2.8362670
            i (Inclination)                 : 156.80920
            Ω (Longitude of ascending node) : 49.89090
            ω (Argument of perihelion)      : 161.72240
            L (Longitude of perihelion)     : 66.77905
            B (Latitude of perihelion)      : 7.09427
            T (Time of perihelion passage)  : 2458456.08890
            P (Orbital period in years)     : 70.78

            Epoch                           : 2025 Jul 13
            Reference                       : MPEC 2022-VC5

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)
        

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 indicates the expected brightness if this object is a comet (17.10 + 5 log[∆] + 5.00 log[r]), whereas the red curve indicates the expected lightcurve for an asteroid (H=17.20; G=.15).

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
2025-07-14 00:00 UT   06 58 14.6   +04 33 23    15.786   14.830   19.1    1.3   205   29.2 
2025-07-14 20:29 UT   06 58 25.1   +04 33 05    15.788   14.833   19.4    1.3   207   29.2 
2025-07-15 00:00 UT   06 58 26.9   +04 33 02    15.788   14.834   19.4    1.3   208   29.2 
2025-07-16 00:00 UT   06 58 39.2   +04 32 40    15.790   14.838   19.7    1.3   210   29.2 
2025-07-17 00:00 UT   06 58 51.5   +04 32 17    15.792   14.842   20.1    1.3   213   29.2 
2025-07-18 00:00 UT   06 59 03.6   +04 31 53    15.793   14.846   20.5    1.4   215   29.2 
2025-07-19 00:00 UT   06 59 15.8   +04 31 27    15.794   14.850   20.9    1.4   217   29.2 
2025-07-20 00:00 UT   06 59 27.9   +04 31 01    15.795   14.854   21.4    1.4   220   29.2 
2025-07-21 00:00 UT   06 59 39.9   +04 30 33    15.795   14.858   21.9    1.5   222   29.2 
2025-07-22 00:00 UT   06 59 51.8   +04 30 05    15.796   14.862   22.4    1.5   224   29.3 
2025-07-23 00:00 UT   07 00 03.7   +04 29 35    15.796   14.866   22.9    1.5   226   29.3 
2025-07-24 00:00 UT   07 00 15.6   +04 29 05    15.795   14.869   23.5    1.6   227   29.3 

    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.