C/2019 L3 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Nearest approach	6 Jan 2022	9.4	3.559 AU	2.585 AU	07h06m	+31°49'	170.6°	2.6°	174°
Perihelion	10 Jan 2022	9.4	3.559 AU	2.587 AU	07h02m	+31°10'	169.6°	2.9°	151°
Today	20 Jul 2025	16.7	10.610 AU	10.547 AU	12h01m	-53°43'	90.8°	5.5°	125°

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 C/2019 L3 (ATLAS) are:

            e (Eccentricity)                : 1.0031780
            q (Perihelion distance)         : 3.5589220
            i (Inclination)                 : 48.34600
            Ω (Longitude of ascending node) : 290.71580
            ω (Argument of perihelion)      : 171.75510
            L (Longitude of perihelion)     : 285.21481
            B (Latitude of perihelion)      : 6.15093
            T (Time of perihelion passage)  : 2459589.63450

            Epoch                           : 2025 Jul 19
            Reference                       : MPEC 2025-MC0

            Classification(s):              : Nearly isotropic; New (a > 10000 AU)
        

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 is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (4.50 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 2.35 + 5 log[∆] + 9.02 log[r]).

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
2025-07-20 00:00 UT   12 01 13.3   -53 43 56    10.542   10.609   91.0    5.5   125   16.7 
2025-07-20 06:55 UT   12 01 20.5   -53 43 12    10.547   10.610   90.8    5.5   125   16.7 
2025-07-21 00:00 UT   12 01 38.3   -53 41 24    10.559   10.615   90.4    5.5   126   16.7 
2025-07-22 00:00 UT   12 02 03.8   -53 38 57    10.576   10.621   89.8    5.5   126   16.7 
2025-07-23 00:00 UT   12 02 29.6   -53 36 32    10.593   10.627   89.1    5.5   127   16.7 
2025-07-24 00:00 UT   12 02 55.8   -53 34 12    10.610   10.633   88.5    5.5   128   16.7 
2025-07-25 00:00 UT   12 03 22.4   -53 31 54    10.627   10.639   87.9    5.5   128   16.7 
2025-07-26 00:00 UT   12 03 49.3   -53 29 40    10.645   10.645   87.3    5.5   129   16.8 
2025-07-27 00:00 UT   12 04 16.5   -53 27 30    10.662   10.651   86.7    5.5   129   16.8 
2025-07-28 00:00 UT   12 04 44.2   -53 25 23    10.679   10.657   86.0    5.5   130   16.8 
2025-07-29 00:00 UT   12 05 12.1   -53 23 20    10.696   10.664   85.4    5.4   131   16.8 
2025-07-30 00:00 UT   12 05 40.4   -53 21 21    10.713   10.670   84.8    5.4   131   16.8 

    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.