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	5 Dec 2025	29.2	15.391 AU	14.598 AU	06h58m	+02°35'	142.4°	2.2°	304°

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
2025-12-04 00:00 UT   06 58 24.2   +02 35 36    14.604   15.386  141.3    2.3   303   29.2 
2025-12-05 00:00 UT   06 58 07.7   +02 35 25    14.599   15.390  142.2    2.2   304   29.2 
2025-12-05 06:02 UT   06 58 03.5   +02 35 23    14.598   15.391  142.4    2.2   304   29.2 
2025-12-06 00:00 UT   06 57 51.1   +02 35 16    14.594   15.394  143.1    2.2   305   29.2 
2025-12-07 00:00 UT   06 57 34.3   +02 35 08    14.590   15.398  144.0    2.2   306   29.2 
2025-12-08 00:00 UT   06 57 17.4   +02 35 02    14.585   15.401  144.8    2.1   307   29.2 
2025-12-09 00:00 UT   06 57 00.3   +02 34 57    14.581   15.405  145.7    2.1   308   29.2 
2025-12-10 00:00 UT   06 56 43.2   +02 34 54    14.577   15.409  146.6    2.0   310   29.2 
2025-12-11 00:00 UT   06 56 25.8   +02 34 52    14.574   15.413  147.4    2.0   311   29.2 
2025-12-12 00:00 UT   06 56 08.4   +02 34 52    14.571   15.417  148.2    1.9   312   29.2 
2025-12-13 00:00 UT   06 55 50.8   +02 34 53    14.568   15.421  149.0    1.9   314   29.2 
2025-12-14 00:00 UT   06 55 33.1   +02 34 56    14.565   15.424  149.8    1.8   315   29.2 
2025-12-15 00:00 UT   06 55 15.3   +02 35 00    14.562   15.428  150.6    1.8   317   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.