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Comet C/2017 T3 (ATLAS)

Available Resources

Comet C/2017 T3 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 T3 (ATLAS) is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Comet C/2017 T3 (ATLAS) in Andromeda on January, 23 2018
High Precision Live Sky Chart
23h 21m 15s
+50° 07’ 04”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Comet C/2017 T3 (ATLAS) Rise and Set Times

Comet C/2017 T3 (ATLAS) is circumpolar from Greenwich, United Kingdom [change] and transits at 15:09 UTC (altitude: 88.6°)

Comet C/2017 T3 (ATLAS) Orbit Diagram

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) 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 MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jan 16 16.78 23h 08m 21s +52° 11’ 29” Andromeda
2018 Jan 17 16.77 23h 10m 10s +51° 53’ 18” Andromeda
2018 Jan 18 16.76 23h 12m 01s +51° 35’ 17” Andromeda
2018 Jan 19 16.74 23h 13m 51s +51° 17’ 22” Andromeda
2018 Jan 20 16.73 23h 15m 42s +50° 59’ 35” Andromeda
2018 Jan 21 16.72 23h 17m 33s +50° 41’ 57” Andromeda
2018 Jan 22 16.70 23h 19m 23s +50° 24’ 26” Andromeda
2018 Jan 23 16.69 23h 21m 15s +50° 07’ 04” Andromeda
2018 Jan 24 16.68 23h 23m 06s +49° 49’ 49” Andromeda
2018 Jan 25 16.66 23h 24m 56s +49° 32’ 43” Andromeda
2018 Jan 26 16.65 23h 26m 48s +49° 15’ 45” Andromeda
2018 Jan 27 16.64 23h 28m 41s +48° 58’ 54” Andromeda
2018 Jan 28 16.62 23h 30m 33s +48° 42’ 12” Andromeda
2018 Jan 29 16.61 23h 32m 25s +48° 25’ 40” Andromeda

Distance of Comet C/2017 T3 (ATLAS) from Earth

The following chart shows the distance of Comet C/2017 T3 (ATLAS) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

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

Distance of Comet C/2017 T3 (ATLAS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 T3 (ATLAS)

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 2075

Comet C/2017 T3 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 T3 (ATLAS) at epoch 31 October 2017 00:00 UTC (JD: 2458058.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99938813
Orbit inclination i 88.10846345°
Perihelion distance q 0.82518876 AU
123,446,482 km
Aphelion distance Q 2,696.46066339 AU
403,384,774,478 km
Semi-major axis a 1,348.64292607 AU
201,754,110,480 km
Orbital period period 49,528.3300 years
18,090,221.9387 days
Date of perihelion transit Tp 2018-Jul-19 03:40:50
2,458,318.6534 JD
Argument of perihelion peri 246.89524539179°
Longitude of the ascending node node 230.08477736722°
Mean anomaly M 359.99482288215°
Mean motion n 0.00001990°/day
Closest approach to Earth* 2018-Aug-01
Distance of closest approach* 1.35129550 AU
202,150,930 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.