C/2019 K1 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	10 Feb 2020	14.1	2.022 AU	2.316 AU	00h20m	-68°58'	60.5°	25.1°	132°
Nearest approach	22 Feb 2020	14.1	2.026 AU	2.296 AU	01h28m	-62°08'	61.8°	25.5°	125°
Today	5 Jul 2025	27.2	15.523 AU	16.195 AU	04h39m	+63°52'	47.2°	2.8°	314°

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 K1 (ATLAS) are:

            e (Eccentricity)                : 0.9993020
            q (Perihelion distance)         : 2.0216130
            i (Inclination)                 : 87.01880
            Ω (Longitude of ascending node) : 73.31210
            ω (Argument of perihelion)      : 265.78320
            L (Longitude of perihelion)     : 108.51072
            B (Latitude of perihelion)      : -84.83736
            T (Time of perihelion passage)  : 2458890.33700
            P (Orbital period in years)     : 155870.49

            Epoch                           : 2025 Jul 05
            Reference                       : MPEC 2022-O08

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (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 is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (10.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 9.26 + 5 log[∆] + 10.00 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
2025-07-05 00:00 UT   04 38 59.7   +63 49 59    16.195   15.518   46.9    2.7   315   27.2 
2025-07-05 23:43 UT   04 39 26.0   +63 52 03    16.195   15.523   47.2    2.8   314   27.2 
2025-07-06 00:00 UT   04 39 26.3   +63 52 05    16.195   15.524   47.3    2.8   314   27.2 
2025-07-07 00:00 UT   04 39 52.7   +63 54 12    16.195   15.529   47.7    2.8   313   27.2 
2025-07-08 00:00 UT   04 40 18.9   +63 56 20    16.195   15.535   48.1    2.8   312   27.2 
2025-07-09 00:00 UT   04 40 44.8   +63 58 30    16.195   15.541   48.5    2.8   311   27.2 
2025-07-10 00:00 UT   04 41 10.4   +64 00 42    16.194   15.547   49.0    2.8   310   27.2 
2025-07-11 00:00 UT   04 41 35.8   +64 02 55    16.194   15.552   49.4    2.8   309   27.2 
2025-07-12 00:00 UT   04 42 01.0   +64 05 09    16.193   15.558   49.9    2.9   308   27.2 
2025-07-13 00:00 UT   04 42 25.9   +64 07 25    16.192   15.564   50.4    2.9   307   27.2 
2025-07-14 00:00 UT   04 42 50.5   +64 09 43    16.191   15.569   50.8    2.9   306   27.2 
2025-07-15 00:00 UT   04 43 14.8   +64 12 01    16.190   15.575   51.3    2.9   305   27.2 

    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.