C/2019 K5 (Young)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	21 Jun 2019	15.7	2.056 AU	2.185 AU	01h12m	+08°58'	69.1°	27.5°	248°
Nearest approach	10 Oct 2019	15.7	2.433 AU	1.573 AU	03h34m	+03°02'	141.2°	14.9°	276°
Today	4 Aug 2025	28.6	16.779 AU	17.776 AU	08h51m	+07°05'	10.2°	0.6°	188°

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)                : 0.9877670
            q (Perihelion distance)         : 2.0557240
            i (Inclination)                 : 15.29020
            Ω (Longitude of ascending node) : 177.28540
            ω (Argument of perihelion)      : 175.14010
            L (Longitude of perihelion)     : 172.59675
            B (Latitude of perihelion)      : 1.28017
            T (Time of perihelion passage)  : 2458655.65800
            P (Orbital period in years)     : 2178.45

            Epoch                           : 2025 Aug 03
            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 11.19 + 5 log[∆] + 9.13 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
2025-08-04 00:00 UT   08 51 35.4   +07 06 25    17.773   16.776   10.3    0.6   186   28.6 
2025-08-04 12:19 UT   08 51 42.7   +07 05 56    17.776   16.779   10.2    0.6   188   28.6 
2025-08-05 00:00 UT   08 51 49.7   +07 05 29    17.778   16.781   10.2    0.6   191   28.6 
2025-08-06 00:00 UT   08 52 04.0   +07 04 32    17.784   16.787   10.1    0.6   196   28.6 
2025-08-07 00:00 UT   08 52 18.3   +07 03 34    17.789   16.792   10.2    0.6   201   28.6 
2025-08-08 00:00 UT   08 52 32.5   +07 02 36    17.794   16.798   10.3    0.6   206   28.6 
2025-08-09 00:00 UT   08 52 46.7   +07 01 37    17.798   16.803   10.5    0.6   211   28.6 
2025-08-10 00:00 UT   08 53 00.9   +07 00 38    17.803   16.808   10.7    0.6   216   28.6 
2025-08-11 00:00 UT   08 53 15.1   +06 59 39    17.807   16.814   11.1    0.7   220   28.6 
2025-08-12 00:00 UT   08 53 29.2   +06 58 39    17.811   16.819   11.4    0.7   224   28.6 
2025-08-13 00:00 UT   08 53 43.3   +06 57 38    17.814   16.825   11.9    0.7   228   28.6 
2025-08-14 00:00 UT   08 53 57.4   +06 56 37    17.817   16.830   12.4    0.7   232   28.6 

    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.