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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 Serpens on April, 21 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
15h 53m 51s
-03° 10’ 10”

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.

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

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

Azimuth: 93.2°
Max altitude: 35.2°
Azimuth: 266.7°

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Apr 14 16h 01m 46s -04° 41’ 12” 17.80 Ophiucus
2019 Apr 15 16h 00m 48s -04° 29’ 21” 17.81 Libra
2019 Apr 16 15h 59m 48s -04° 17’ 34” 17.82 Libra
2019 Apr 17 15h 58m 49s -04° 05’ 48” 17.83 Libra
2019 Apr 18 15h 57m 47s -03° 54’ 06” 17.84 Libra
2019 Apr 19 15h 56m 45s -03° 42’ 27” 17.85 Libra
2019 Apr 20 15h 55m 45s -03° 30’ 51” 17.86 Serpens
2019 Apr 21 15h 54m 42s -03° 19’ 18” 17.87 Serpens
2019 Apr 22 15h 53m 39s -03° 07’ 51” 17.88 Serpens
2019 Apr 23 15h 52m 36s -02° 56’ 29” 17.90 Serpens
2019 Apr 24 15h 51m 32s -02° 45’ 11” 17.91 Serpens
2019 Apr 25 15h 50m 27s -02° 33’ 56” 17.92 Serpens
2019 Apr 26 15h 49m 23s -02° 22’ 49” 17.93 Serpens
2019 Apr 27 15h 48m 19s -02° 11’ 47” 17.94 Serpens

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 2100

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 2100

Comet C/2017 T3 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2017 T3 (ATLAS) at epoch 22 December 2017 00:00 UTC (JD: 2458110.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.99938182
Orbit inclination i 88.10718494°
Perihelion distance q 0.82521201 AU
123,449,959 km
Aphelion distance Q 2,669.00340976 AU
399,277,227,792 km
Semi-major axis a 1,334.91431088 AU
199,700,338,876 km
Orbital period period 48,773.9900 years
17,814,699.8781 days
Date of perihelion transit Tp 2018-Jul-19 03:33:42
2,458,318.6484 JD
Next perihelion transit 50793-Jul-16 00:38
20,273,018.5265 JD
Argument of perihelion peri 246.89419158528°
Longitude of the ascending node node 230.08678189128°
Mean anomaly M 359.99579373053°
Mean motion n 0.00002021°/day
Closest approach to Earth* 2018-Aug-01
Distance of closest approach* 1.35138339 AU
202,164,079 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.