P/2019 T5 (ATLAS)
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	2 Aug 2019	18.6	1.522 AU	2.269 AU	06h29m	+19°43'	33.0°	21.3°	267°
Nearest approach	28 Jan 2020	20.7	2.576 AU	2.041 AU	10h56m	-41°54'	111.8°	20.8°	325°
Today	26 Apr 2024	30.4	10.915 AU	9.986 AU	15h38m	-27°28'	156.3°	2.1°	302°

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)                : 0.8098010
            q (Perihelion distance)         : 1.5218990
            i (Inclination)                 : 33.49570
            Ω (Longitude of ascending node) : 247.61240
            ω (Argument of perihelion)      : 189.58620
            L (Longitude of perihelion)     : 255.62930
            B (Latitude of perihelion)      : -5.27317
            T (Time of perihelion passage)  : 2458698.14680
            P (Orbital period in years)     : 22.63

            Epoch                           : 2024 Apr 25
            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
2024-04-26 00:00 UT   15 38 28.7   -27 29 20     9.987   10.914  155.9    2.2   301   30.4 
2024-04-26 08:23 UT   15 38 21.6   -27 28 53     9.986   10.915  156.3    2.1   302   30.4 
2024-04-27 00:00 UT   15 38 08.4   -27 28 03     9.984   10.917  156.9    2.1   302   30.4 
2024-04-28 00:00 UT   15 37 47.8   -27 26 45     9.981   10.920  157.9    2.0   303   30.4 
2024-04-29 00:00 UT   15 37 27.2   -27 25 26     9.978   10.924  158.9    1.9   304   30.4 
2024-04-30 00:00 UT   15 37 06.3   -27 24 05     9.976   10.927  159.8    1.8   305   30.4 
2024-05-01 00:00 UT   15 36 45.4   -27 22 42     9.973   10.930  160.8    1.7   307   30.4 
2024-05-02 00:00 UT   15 36 24.3   -27 21 19     9.971   10.933  161.8    1.7   308   30.4 
2024-05-03 00:00 UT   15 36 03.2   -27 19 53     9.970   10.936  162.7    1.6   310   30.4 
2024-05-04 00:00 UT   15 35 41.9   -27 18 27     9.968   10.940  163.6    1.5   311   30.4 
2024-05-05 00:00 UT   15 35 20.5   -27 16 59     9.967   10.943  164.6    1.4   313   30.4 
2024-05-06 00:00 UT   15 34 59.0   -27 15 29     9.966   10.946  165.5    1.3   315   30.4 

    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.