P/2019 T5 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	3 Aug 2019	18.6	1.524 AU	2.262 AU	06h30m	+19°40'	33.6°	21.6°	268°
Nearest approach	27 Jan 2020	20.6	2.562 AU	2.031 AU	10h55m	-41°49'	111.6°	20.9°	324°
Today	9 Oct 2025	31.5	12.387 AU	13.098 AU	15h43m	-23°17'	43.0°	3.2°	107°

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 P/2019 T5 (ATLAS) are:

            e (Eccentricity)                : 0.8097360
            q (Perihelion distance)         : 1.5238240
            i (Inclination)                 : 33.48840
            Ω (Longitude of ascending node) : 247.61370
            ω (Argument of perihelion)      : 189.63320
            L (Longitude of perihelion)     : 255.67080
            B (Latitude of perihelion)      : -5.29783
            T (Time of perihelion passage)  : 2458699.09480
            P (Orbital period in years)     : 22.67

            Epoch                           : 2025 Oct 08
            Reference                       : MPEC 2021-P47

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); Halley type (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 light curve is based on the absolute magnitude and slope parameter as calculated from an MPEC, or the latest values provided by the minor planet center. (15.00 + 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
2025-10-09 00:00 UT   15 43 25.2   -23 16 57    13.092   12.386   43.4    3.2   107   31.5 
2025-10-09 10:34 UT   15 43 32.7   -23 17 07    13.098   12.387   43.0    3.2   107   31.5 
2025-10-10 00:00 UT   15 43 42.2   -23 17 20    13.106   12.388   42.5    3.1   107   31.5 
2025-10-11 00:00 UT   15 43 59.5   -23 17 43    13.119   12.390   41.6    3.1   107   31.5 
2025-10-12 00:00 UT   15 44 16.9   -23 18 07    13.133   12.393   40.7    3.0   107   31.5 
2025-10-13 00:00 UT   15 44 34.5   -23 18 32    13.146   12.395   39.7    2.9   107   31.5 
2025-10-14 00:00 UT   15 44 52.3   -23 18 57    13.159   12.397   38.8    2.9   107   31.5 
2025-10-15 00:00 UT   15 45 10.3   -23 19 23    13.171   12.400   37.9    2.8   107   31.5 
2025-10-16 00:00 UT   15 45 28.4   -23 19 50    13.184   12.402   37.0    2.8   107   31.5 
2025-10-17 00:00 UT   15 45 46.7   -23 20 17    13.196   12.404   36.1    2.7   107   31.5 
2025-10-18 00:00 UT   15 46 05.1   -23 20 45    13.208   12.407   35.1    2.6   108   31.5 
2025-10-19 00:00 UT   15 46 23.7   -23 21 14    13.220   12.409   34.2    2.6   108   31.5 

    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.