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A/2019 G3
ephemeris date magn radius delta ra dec elong phase PA
Perihelion2 Dec 201822.62.836 AU3.816 AU 16h26m-16°21'5.7°2.0°347°
Nearest approach17 Apr 201921.73.103 AU2.120 AU 14h04m-23°14'165.8°4.6°334°
Today7 Jul 202629.616.191 AU17.156 AU 06h44m+05°31'17.7°1.1°195°
A/2019 G3- 2026-07-07
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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.)


Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. The displayed light curve is calculated under the assumption that the object remains inactive. (H=17.20; G=.15).



Charts

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.




Orbital elements

The orbital elements of A/2019 G3 are: 

    e (Eccentricity)                : 0.8339500
    q (Perihelion distance)         : 2.8361010
    i (Inclination)                 : 156.82100
    Ω (Longitude of ascending node) : 49.84740
    ω (Argument of perihelion)      : 161.64700
    L (Longitude of perihelion)     : 66.80734
    B (Latitude of perihelion)      : 7.11924
    T (Time of perihelion passage)  : 2458454.67780
    P (Orbital period in years)     : 70.59

    Epoch                           : 2026 May 29
    Reference                       : MPC194160

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-07-06 00:00 UT   06 44 14.1   +05 32 10    17.153   16.187   17.6    1.1   191   29.6 
2026-07-07 00:00 UT   06 44 25.8   +05 31 59    17.155   16.190   17.7    1.1   194   29.6 
2026-07-07 03:44 UT   06 44 27.6   +05 31 58    17.156   16.191   17.7    1.1   195   29.6 
2026-07-08 00:00 UT   06 44 37.4   +05 31 48    17.158   16.194   17.9    1.1   197   29.6 
2026-07-09 00:00 UT   06 44 49.1   +05 31 36    17.161   16.198   18.1    1.1   200   29.6 
2026-07-10 00:00 UT   06 45 00.7   +05 31 22    17.163   16.201   18.3    1.1   203   29.6 
2026-07-11 00:00 UT   06 45 12.3   +05 31 08    17.165   16.205   18.6    1.1   206   29.6 
2026-07-12 00:00 UT   06 45 23.9   +05 30 52    17.166   16.209   18.9    1.2   208   29.6 
2026-07-13 00:00 UT   06 45 35.4   +05 30 36    17.168   16.212   19.3    1.2   211   29.6 
2026-07-14 00:00 UT   06 45 46.9   +05 30 18    17.169   16.216   19.7    1.2   213   29.6 
2026-07-15 00:00 UT   06 45 58.3   +05 29 60    17.170   16.219   20.1    1.2   216   29.6 
2026-07-16 00:00 UT   06 46 09.7   +05 29 40    17.170   16.223   20.6    1.3   218   29.6 
2026-07-17 00:00 UT   06 46 21.0   +05 29 20    17.171   16.227   21.1    1.3   220   29.6 




    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.

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