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	16h27m	-16°24'	6.0°	2.1°	340°
Nearest approach	17 Apr 2019	21.7	3.099 AU	2.116 AU	14h05m	-23°13'	165.8°	4.5°	334°
Today	23 Oct 2025	29.3	15.227 AU	14.994 AU	07h06m	+03°01'	101.7°	3.7°	281°

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)                : 0.8341690
    q (Perihelion distance)         : 2.8356800
    i (Inclination)                 : 156.81210
    Ω (Longitude of ascending node) : 49.87980
    ω (Argument of perihelion)      : 161.69570
    L (Longitude of perihelion)     : 66.79321
    B (Latitude of perihelion)      : 7.10349
    T (Time of perihelion passage)  : 2458455.71230
    P (Orbital period in years)     : 70.71

    Epoch                           : 2025 Oct 22
    Reference                       : MPEC 2022-VC5

    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
2025-10-22 00:00 UT   07 06 48.7   +03 02 45    15.013   15.221  100.2    3.7   281   29.3 
2025-10-23 00:00 UT   07 06 42.3   +03 01 47    15.001   15.225  101.1    3.7   281   29.3 
2025-10-23 14:21 UT   07 06 38.3   +03 01 12    14.994   15.227  101.7    3.7   281   29.3 
2025-10-24 00:00 UT   07 06 35.6   +03 00 49    14.989   15.228  102.1    3.7   281   29.3 
2025-10-25 00:00 UT   07 06 28.7   +02 59 52    14.977   15.232  103.0    3.6   282   29.3 
2025-10-26 00:00 UT   07 06 21.4   +02 58 56    14.965   15.236  104.0    3.6   282   29.3 
2025-10-27 00:00 UT   07 06 13.9   +02 58 01    14.953   15.240  105.0    3.6   282   29.3 
2025-10-28 00:00 UT   07 06 06.1   +02 57 06    14.941   15.244  105.9    3.6   283   29.3 
2025-10-29 00:00 UT   07 05 58.1   +02 56 12    14.929   15.248  106.9    3.6   283   29.3 
2025-10-30 00:00 UT   07 05 49.8   +02 55 19    14.917   15.252  107.9    3.6   283   29.3 
2025-10-31 00:00 UT   07 05 41.2   +02 54 27    14.906   15.256  108.8    3.5   284   29.3 
2025-11-01 00:00 UT   07 05 32.3   +02 53 36    14.894   15.259  109.8    3.5   284   29.3 
2025-11-02 00:00 UT   07 05 23.2   +02 52 46    14.883   15.263  110.8    3.5   285   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.