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°23'	6.0°	2.1°	341°
Nearest approach	17 Apr 2019	21.7	3.100 AU	2.117 AU	14h05m	-23°13'	165.8°	4.5°	334°
Today	1 Jan 2026	29.1	15.496 AU	14.570 AU	06h49m	+02°40'	159.7°	1.3°	359°

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)                : 0.8341490
    q (Perihelion distance)         : 2.8356600
    i (Inclination)                 : 156.81290
    Ω (Longitude of ascending node) : 49.87690
    ω (Argument of perihelion)      : 161.69060
    L (Longitude of perihelion)     : 66.79517
    B (Latitude of perihelion)      : 7.10518
    T (Time of perihelion passage)  : 2458455.62060
    P (Orbital period in years)     : 70.70

    Epoch                           : 2025 Nov 12
    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
2025-12-31 00:00 UT   06 50 20.5   +02 39 37    14.565   15.489  159.4    1.3   353   29.1 
2026-01-01 00:00 UT   06 50 01.8   +02 40 08    14.567   15.493  159.6    1.3   356   29.1 
2026-01-01 19:50 UT   06 49 46.3   +02 40 34    14.570   15.496  159.7    1.3   359   29.1 
2026-01-02 00:00 UT   06 49 43.1   +02 40 39    14.570   15.497  159.7    1.3   359   29.1 
2026-01-03 00:00 UT   06 49 24.4   +02 41 12    14.574   15.501  159.8    1.3     3   29.1 
2026-01-04 00:00 UT   06 49 05.7   +02 41 47    14.577   15.504  159.8    1.3     6   29.1 
2026-01-05 00:00 UT   06 48 47.0   +02 42 23    14.581   15.508  159.8    1.3     9   29.1 
2026-01-06 00:00 UT   06 48 28.3   +02 43 00    14.586   15.512  159.7    1.3    12   29.2 
2026-01-07 00:00 UT   06 48 09.7   +02 43 39    14.590   15.516  159.5    1.3    15   29.2 
2026-01-08 00:00 UT   06 47 51.1   +02 44 19    14.595   15.520  159.3    1.3    18   29.2 
2026-01-09 00:00 UT   06 47 32.5   +02 45 01    14.601   15.523  159.1    1.3    21   29.2 
2026-01-10 00:00 UT   06 47 14.0   +02 45 44    14.606   15.527  158.8    1.3    24   29.2 
2026-01-11 00:00 UT   06 46 55.6   +02 46 28    14.612   15.531  158.4    1.3    27   29.2 

    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.