C/2019 K5 (Young)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	19 Jun 2019	15.8	2.059 AU	2.207 AU	01h11m	+08°53'	68.2°	27.3°	248°
Nearest approach	10 Oct 2019	15.7	2.445 AU	1.585 AU	03h36m	+03°04'	141.2°	14.8°	277°
Today	9 Oct 2026	29.3	19.037 AU	19.556 AU	09h12m	+05°46'	57.4°	2.5°	281°

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.)

Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 11.2 + 5 log[∆] + 9.2 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)

Charts

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.

Orbital elements

The orbital elements of C/2019 K5 (Young) are:

    e (Eccentricity)                : 0.9875560
    q (Perihelion distance)         : 2.0589000
    i (Inclination)                 : 15.27470
    Ω (Longitude of ascending node) : 177.30510
    ω (Argument of perihelion)      : 175.13810
    L (Longitude of perihelion)     : 172.61417
    B (Latitude of perihelion)      : 1.27942
    T (Time of perihelion passage)  : 2458654.46870
    P (Orbital period in years)     : 2128.20

    Epoch                           : 2026 May 29
    Reference                       : MPC194161

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

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-10-08 00:00 UT   09 11 59.3   +05 47 43    19.567   19.031   56.3    2.5   281   29.3 
2026-10-09 00:00 UT   09 12 06.2   +05 46 47    19.558   19.036   57.2    2.5   281   29.3 
2026-10-09 03:47 UT   09 12 07.3   +05 46 38    19.556   19.037   57.4    2.5   281   29.3 
2026-10-10 00:00 UT   09 12 13.0   +05 45 51    19.548   19.041   58.2    2.6   281   29.3 
2026-10-11 00:00 UT   09 12 19.5   +05 44 56    19.539   19.046   59.1    2.6   281   29.3 
2026-10-12 00:00 UT   09 12 25.9   +05 44 01    19.529   19.051   60.1    2.6   282   29.3 
2026-10-13 00:00 UT   09 12 32.1   +05 43 07    19.520   19.057   61.0    2.6   282   29.3 
2026-10-14 00:00 UT   09 12 38.2   +05 42 13    19.510   19.062   61.9    2.6   282   29.3 
2026-10-15 00:00 UT   09 12 44.0   +05 41 20    19.500   19.067   62.9    2.7   282   29.3 
2026-10-16 00:00 UT   09 12 49.7   +05 40 28    19.490   19.072   63.8    2.7   283   29.3 
2026-10-17 00:00 UT   09 12 55.2   +05 39 36    19.480   19.077   64.8    2.7   283   29.3 
2026-10-18 00:00 UT   09 13 00.5   +05 38 44    19.469   19.082   65.7    2.7   283   29.3 
2026-10-19 00:00 UT   09 13 05.7   +05 37 53    19.459   19.087   66.7    2.7   283   29.3 

    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.