C/2019 K5 (Young)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	20 Jun 2019	15.7	2.056 AU	2.188 AU	01h12m	+08°57'	69.0°	27.5°	248°
Nearest approach	10 Oct 2019	15.7	2.435 AU	1.575 AU	03h34m	+03°03'	141.2°	14.9°	276°
Today	15 Sep 2025	28.7	17.007 AU	17.785 AU	09h00m	+06°20'	38.2°	2.1°	273°

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 K5 (Young) are:

            e (Eccentricity)                : 0.9877420
            q (Perihelion distance)         : 2.0564010
            i (Inclination)                 : 15.28780
            Ω (Longitude of ascending node) : 177.29440
            ω (Argument of perihelion)      : 175.13670
            L (Longitude of perihelion)     : 172.60241
            B (Latitude of perihelion)      : 1.28086
            T (Time of perihelion passage)  : 2458655.49040
            P (Orbital period in years)     : 2172.86

            Epoch                           : 2025 Sep 15
            Reference                       : MPEC 2021-P47

            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 (13.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.18 + 5 log[∆] + 9.15 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
2025-09-15 00:00 UT   09 00 48.5   +06 21 31    17.789   17.002   37.5    2.1   273   28.7 
2025-09-15 18:55 UT   09 00 57.2   +06 20 38    17.785   17.007   38.2    2.1   273   28.7 
2025-09-16 00:00 UT   09 00 59.6   +06 20 23    17.784   17.008   38.4    2.1   274   28.7 
2025-09-17 00:00 UT   09 01 10.5   +06 19 16    17.779   17.013   39.3    2.1   274   28.7 
2025-09-18 00:00 UT   09 01 21.4   +06 18 08    17.773   17.018   40.2    2.2   274   28.7 
2025-09-19 00:00 UT   09 01 32.1   +06 17 01    17.768   17.024   41.1    2.2   275   28.7 
2025-09-20 00:00 UT   09 01 42.6   +06 15 53    17.762   17.029   42.0    2.3   275   28.7 
2025-09-21 00:00 UT   09 01 53.1   +06 14 46    17.756   17.035   42.9    2.3   276   28.7 
2025-09-22 00:00 UT   09 02 03.3   +06 13 39    17.750   17.040   43.8    2.3   276   28.7 
2025-09-23 00:00 UT   09 02 13.4   +06 12 33    17.744   17.045   44.7    2.4   276   28.7 
2025-09-24 00:00 UT   09 02 23.4   +06 11 26    17.737   17.051   45.6    2.4   277   28.7 
2025-09-25 00:00 UT   09 02 33.2   +06 10 20    17.731   17.056   46.5    2.4   277   28.7 

    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.