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Comet C/2017 T3 (ATLAS)

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Comet C/2017 T3 (ATLAS) Position

Comet C/2017 T3 (ATLAS) is currently in the constellation of Serpens. The current Right Ascension is 15h 19m 05s and the Declination is +01° 57’ 34”.

15h 19m 05s
+01° 57’ 34”

Simplified sky chart showing where Comet C/2017 T3 (ATLAS) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2017 T3 (ATLAS) in Serpens on October, 18 2019
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Hihgher precision deep sky finder chart showing where Comet C/2017 T3 (ATLAS) is right now (view fullscreen)

C/2017 T3 (ATLAS)
RA: 15h 19m 05s
Dec: +01° 57’ 34”
Deep sky finder chart for Comet C/2017 T3 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2017 T3 (ATLAS)?, a page that provides all the information needed to find Comet C/2017 T3 (ATLAS) in the sky and additional links to sky charts.

Comet C/2017 T3 (ATLAS) Distance

The distance of Comet C/2017 T3 (ATLAS) from Earth is currently 994,439,178 kilometers, equivalent to 6.647415 Astronomical Units. Light takes 55 minutes and 17.0920 seconds to travel from Comet C/2017 T3 (ATLAS) and arrive to us.

55 minutes and 17.0920 seconds

The following chart shows the distance of Comet C/2017 T3 (ATLAS) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2017 T3 (ATLAS) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2017 T3 (ATLAS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2017 T3 (ATLAS) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2017 T3 (ATLAS) to Earth happens on Wed Aug 1 2018 at a distance of 1.35138255 Astronomical Units, or 202,163,953 kilometers:

Wed Aug 1 2018

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2017 T3 (ATLAS) brightness

The current visual magnitude of Comet C/2017 T3 (ATLAS) is 20.66.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behvior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 T3 (ATLAS), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Comet C/2017 T3 (ATLAS) between January 2013 and December 2100

Comet C/2017 T3 (ATLAS) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Comet C/2017 T3 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.0°
Max altitude: 40.5°
Azimuth: 271.9°
Comet C/2017 T3 (ATLAS) is below the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet C/2017 T3 (ATLAS) touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2017 T3 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 T3 (ATLAS) at epoch 25 December 2017 00:00 UTC (JD: 2458113.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99938587
Orbit inclination i 88.10722174°
Perihelion distance q 0.82522071 AU
123,451,261 km
Aphelion distance Q 2,686.60978513 AU
401,911,104,063 km
Semi-major axis a 1,343.71750292 AU
201,017,277,662 km
Orbital period period 49,257.2500 years
17,991,210.6360 days
Date of perihelion transit Tp 2018-Jul-19 03:33:36
2,458,318.6483 JD
Next perihelion transit 51276-Oct-21 18:49
20,449,529.2844 JD
Argument of perihelion peri 246.89365958767°
Longitude of the ascending node node 230.0867314144°
Mean anomaly M 359.99589502885°
Mean motion n 0.00002001°/day

Visualization of Comet C/2017 T3 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 T3 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 T3 (ATLAS) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Comet C/2017 T3 (ATLAS)
View Comet C/2017 T3 (ATLAS) in the 3D Solar System Simulator

Comet C/2017 T3 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2017 T3 (ATLAS) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2017 T3 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Oct 11 15h 15m 07s +02° 07’ 21” 20.59 Serpens
2019 Oct 12 15h 15m 42s +02° 05’ 52” 20.60 Serpens
2019 Oct 13 15h 16m 14s +02° 04’ 23” 20.61 Serpens
2019 Oct 14 15h 16m 49s +02° 02’ 57” 20.62 Serpens
2019 Oct 15 15h 17m 22s +02° 01’ 33” 20.63 Serpens
2019 Oct 16 15h 17m 57s +02° 00’ 12” 20.64 Serpens
2019 Oct 17 15h 18m 30s +01° 58’ 53” 20.65 Serpens
2019 Oct 18 15h 19m 05s +01° 57’ 34” 20.66 Serpens
2019 Oct 19 15h 19m 40s +01° 56’ 18” 20.67 Serpens
2019 Oct 20 15h 20m 15s +01° 55’ 05” 20.68 Serpens
2019 Oct 21 15h 20m 49s +01° 53’ 53” 20.69 Serpens
2019 Oct 22 15h 21m 24s +01° 52’ 44” 20.70 Serpens
2019 Oct 23 15h 21m 59s +01° 51’ 37” 20.71 Serpens
2019 Oct 24 15h 22m 33s +01° 50’ 31” 20.72 Serpens