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 td > | 06h30m | +19°40' | 33.6° | 21.6° | 268° |
Nearest approach | 27 Jan 2020 | 20.6 | 2.562 AU | 2.031 AU td > | 10h55m | -41°48' | 111.6° | 20.9° | 324° |
Today | 20 Oct 2025 | 31.5 | 12.413 AU | 13.240 AU td > | 15h46m | -23°22' | 32.6° | 2.5° | 108° |
P/2019 T5 (ATLAS)- 2025-10-20
astro.vanbuitenen.nl
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.
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. (15.0 + 5 log[∆] + 10.0 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 P/2019 T5 (ATLAS) are:
e (Eccentricity) : 0.8097280
q (Perihelion distance) : 1.5239140
i (Inclination) : 33.48750
Ω (Longitude of ascending node) : 247.61390
ω (Argument of perihelion) : 189.63420
L (Longitude of perihelion) : 255.67192
B (Latitude of perihelion) : -5.29825
T (Time of perihelion passage) : 2458699.10490
P (Orbital period in years) : 22.67
Epoch : 2025 Oct 19
Reference : MPEC 2021-P47
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); Halley type (P < 200 years)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2025-10-19 00:00 UT 15 46 23.7 -23 21 14 13.220 12.409 34.2 2.6 108 31.5
2025-10-20 00:00 UT 15 46 42.5 -23 21 43 13.231 12.411 33.3 2.5 108 31.5
2025-10-20 18:28 UT 15 46 57.0 -23 22 06 13.240 12.413 32.6 2.5 108 31.5
2025-10-21 00:00 UT 15 47 01.4 -23 22 13 13.243 12.414 32.4 2.5 108 31.5
2025-10-22 00:00 UT 15 47 20.4 -23 22 44 13.254 12.416 31.5 2.4 108 31.6
2025-10-23 00:00 UT 15 47 39.6 -23 23 14 13.265 12.418 30.6 2.3 108 31.6
2025-10-24 00:00 UT 15 47 58.9 -23 23 46 13.275 12.421 29.6 2.3 108 31.6
2025-10-25 00:00 UT 15 48 18.4 -23 24 18 13.286 12.423 28.7 2.2 109 31.6
2025-10-26 00:00 UT 15 48 37.9 -23 24 51 13.296 12.425 27.8 2.1 109 31.6
2025-10-27 00:00 UT 15 48 57.6 -23 25 24 13.306 12.428 26.9 2.1 109 31.6
2025-10-28 00:00 UT 15 49 17.4 -23 25 57 13.315 12.430 26.0 2.0 109 31.6
2025-10-29 00:00 UT 15 49 37.4 -23 26 31 13.325 12.432 25.1 1.9 109 31.6
2025-10-30 00:00 UT 15 49 57.4 -23 27 06 13.334 12.435 24.2 1.9 110 31.6
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.