A/2019 G3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	2 Dec 2018	22.6	2.836 AU	3.815 AU	16h27m	-16°22'	5.8°	2.0°	345°
Nearest approach	17 Apr 2019	21.7	3.101 AU	2.118 AU	14h04m	-23°14'	165.8°	4.6°	334°
Today	18 Mar 2026	29.5	15.783 AU	15.579 AU	06h32m	+04°09'	100.1°	3.6°	90°

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)                : 0.8340330
    q (Perihelion distance)         : 2.8357240
    i (Inclination)                 : 156.81740
    Ω (Longitude of ascending node) : 49.86010
    ω (Argument of perihelion)      : 161.66300
    L (Longitude of perihelion)     : 66.80467
    B (Latitude of perihelion)      : 7.11426
    T (Time of perihelion passage)  : 2458455.06880
    P (Orbital period in years)     : 70.63

    Epoch                           : 2026 Mar 16
    Reference                       : MPEC 2026-E44

    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
2026-03-17 00:00 UT   06 32 53.8   +04 07 09    15.540   15.776  101.9    3.5    89   29.5 
2026-03-18 00:00 UT   06 32 48.8   +04 08 36    15.560   15.780  101.0    3.5    90   29.5 
2026-03-18 23:02 UT   06 32 44.2   +04 09 59    15.579   15.783  100.1    3.6    90   29.5 
2026-03-19 00:00 UT   06 32 44.0   +04 10 02    15.580   15.784  100.0    3.6    90   29.5 
2026-03-20 00:00 UT   06 32 39.5   +04 11 28    15.599   15.787   99.1    3.6    90   29.5 
2026-03-21 00:00 UT   06 32 35.3   +04 12 54    15.619   15.791   98.1    3.6    91   29.5 
2026-03-22 00:00 UT   06 32 31.3   +04 14 19    15.639   15.795   97.2    3.6    91   29.5 
2026-03-23 00:00 UT   06 32 27.7   +04 15 45    15.659   15.799   96.2    3.6    91   29.5 
2026-03-24 00:00 UT   06 32 24.3   +04 17 10    15.680   15.802   95.2    3.6    92   29.5 
2026-03-25 00:00 UT   06 32 21.1   +04 18 34    15.700   15.806   94.3    3.6    92   29.5 
2026-03-26 00:00 UT   06 32 18.2   +04 19 58    15.720   15.810   93.3    3.6    92   29.5 
2026-03-27 00:00 UT   06 32 15.6   +04 21 22    15.740   15.813   92.4    3.6    93   29.5 
2026-03-28 00:00 UT   06 32 13.3   +04 22 46    15.760   15.817   91.4    3.6    93   29.5 

    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.