A/2019 G3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	4 Dec 2018	22.6	2.841 AU	3.818 AU	16h28m	-16°28'	6.6°	2.3°	332°
Nearest approach	17 Apr 2019	21.7	3.100 AU	2.117 AU	14h06m	-23°11'	166.0°	4.5°	334°
Today	25 Apr 2024	28.8	12.982 AU	13.270 AU	06h59m	+02°40'	71.3°	4.2°	103°

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.)

The orbital elements of A/2019 G3 are:

            e (Eccentricity)                : 0.8344870
            q (Perihelion distance)         : 2.8412450
            i (Inclination)                 : 156.80350
            Ω (Longitude of ascending node) : 49.91460
            ω (Argument of perihelion)      : 161.83650
            L (Longitude of perihelion)     : 66.69558
            B (Latitude of perihelion)      : 7.05291
            T (Time of perihelion passage)  : 2458457.03940
            P (Orbital period in years)     : 71.12

            Epoch                           : 2024 Apr 25
            Reference                       : MPEC 2022-VC5

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

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve indicates the expected brightness if this object is a comet (17.10 + 5 log[∆] + 5.00 log[r]), whereas the red curve indicates the expected lightcurve for an asteroid (H=17.20; G=.15).

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.
A more printer-friendly version of the same chart can be found further down this page as well.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2024-04-25 00:00 UT   06 59 11.7   +02 39 22    13.254   12.979   72.0    4.2   103   28.8 
2024-04-25 19:56 UT   06 59 14.7   +02 40 37    13.270   12.982   71.3    4.2   103   28.8 
2024-04-26 00:00 UT   06 59 15.4   +02 40 52    13.274   12.983   71.1    4.2   103   28.8 
2024-04-27 00:00 UT   06 59 19.3   +02 42 21    13.293   12.987   70.2    4.2   104   28.8 
2024-04-28 00:00 UT   06 59 23.5   +02 43 49    13.313   12.992   69.3    4.2   104   28.8 
2024-04-29 00:00 UT   06 59 27.9   +02 45 15    13.332   12.996   68.4    4.1   104   28.8 
2024-04-30 00:00 UT   06 59 32.7   +02 46 40    13.352   13.000   67.5    4.1   105   28.8 
2024-05-01 00:00 UT   06 59 37.6   +02 48 04    13.371   13.005   66.6    4.1   105   28.8 
2024-05-02 00:00 UT   06 59 42.8   +02 49 27    13.390   13.009   65.8    4.1   106   28.8 
2024-05-03 00:00 UT   06 59 48.3   +02 50 48    13.409   13.014   64.9    4.0   106   28.8 
2024-05-04 00:00 UT   06 59 54.0   +02 52 08    13.428   13.018   64.0    4.0   106   28.8 
2024-05-05 00:00 UT   06 59 60.0   +02 53 27    13.447   13.022   63.1    4.0   107   28.8 

    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.