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Comet C/2015 X7 (ATLAS)

Comet C/2015 X7 (ATLAS) is currently in the constellation of Hercules. The current Right Ascension of Comet C/2015 X7 (ATLAS) is 17h 28m 27s and the Declination is +29° 42’ 03” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2015 X7 (ATLAS) is 25.18 (JPL).

Summary of key facts about Comet C/2015 X7 (ATLAS) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

17h 28m 27s
+29° 42’ 03”

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Additional information about Comet C/2015 X7 (ATLAS) available on TheSkyLive:

Available Resources

Comet C/2015 X7 (ATLAS) Position and Finder Charts

Below we provide Comet C/2015 X7 (ATLAS) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet C/2015 X7 (ATLAS) in Hercules on January, 21 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet C/2015 X7 (ATLAS) in Hercules on January, 21 2021
Field of view: 10x6 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]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2015 X7 (ATLAS) is right now. Click on the image to see a more detailed fullscreen tracker view.

C/2015 X7 (ATLAS)
RA: 17h 28m 27s
Dec: +29° 42’ 03”
Deep sky finder chart for Comet C/2015 X7 (ATLAS)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2015 X7 (ATLAS)?, a page that provides all the information needed to find Comet C/2015 X7 (ATLAS) in the sky and additional links to sky charts.

Comet C/2015 X7 (ATLAS) Distance from Earth

The distance of Comet C/2015 X7 (ATLAS) from Earth is currently 1,948,230,267 kilometers, equivalent to 13.023115 Astronomical Units. Light takes 1 hours, 48 minutes and 18.5967 seconds to travel from Comet C/2015 X7 (ATLAS) and arrive to us.

1 hours, 48 minutes and 18.5967 seconds

The following chart shows the distance of Comet C/2015 X7 (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/2015 X7 (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/2015 X7 (ATLAS) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2015 X7 (ATLAS) to Earth

Between January 2013 and December 2100, the closest approach of Comet C/2015 X7 (ATLAS) to Earth happens on Wed Feb 8 2017 at a distance of 3.191751 Astronomical Units, or 477,479,112 kilometers:

Wed Feb 8 2017

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

Comet C/2015 X7 (ATLAS) brightness

The current visual magnitude of Comet C/2015 X7 (ATLAS) is 25.18.


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 behavior 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/2015 X7 (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/2015 X7 (ATLAS) between January 2013 and December 2100

Comet C/2015 X7 (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/2015 X7 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.3°
Max altitude: 68.2°
Azimuth: 299.7°

The rise and set times are defined as the time at which the upper limb of Comet C/2015 X7 (ATLAS) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2015 X7 (ATLAS) Orbital Elements

The following table lists the orbital elements of Comet C/2015 X7 (ATLAS) at epoch 21 September 2016 00:00 UTC (JD: 2457653.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00189103
Orbit inclination i 57.57892892°
Perihelion distance q 3.68455032 AU
551,200,883 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2016-Jul-30 05:59:45
2,457,599.7498 JD
Argument of perihelion peri 348.48855724564°
Longitude of the ascending node node 139.884065914°
Mean anomaly M 0.00061596115145913°
Mean motion n 0.00001146°/day

Visualization of Comet C/2015 X7 (ATLAS) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2015 X7 (ATLAS) with respect of the Sun and the orbits of the major planets. The position of Comet C/2015 X7 (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/2015 X7 (ATLAS)
View Comet C/2015 X7 (ATLAS) in the 3D Solar System Simulator

Comet C/2015 X7 (ATLAS) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2015 X7 (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/2015 X7 (ATLAS) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 14 17h 25m 41s +29° 29’ 27” 25.17 Hercules
2021 Jan 15 17h 26m 03s +29° 30’ 51” 25.17 Hercules
2021 Jan 16 17h 26m 25s +29° 32’ 20” 25.17 Hercules
2021 Jan 17 17h 26m 45s +29° 33’ 51” 25.18 Hercules
2021 Jan 18 17h 27m 06s +29° 35’ 26” 25.18 Hercules
2021 Jan 19 17h 27m 28s +29° 37’ 02” 25.18 Hercules
2021 Jan 20 17h 27m 47s +29° 38’ 43” 25.18 Hercules
2021 Jan 21 17h 28m 09s +29° 40’ 27” 25.18 Hercules
2021 Jan 22 17h 28m 28s +29° 42’ 12” 25.18 Hercules
2021 Jan 23 17h 28m 49s +29° 44’ 02” 25.19 Hercules
2021 Jan 24 17h 29m 08s +29° 45’ 54” 25.19 Hercules
2021 Jan 25 17h 29m 27s +29° 47’ 48” 25.19 Hercules
2021 Jan 26 17h 29m 48s +29° 49’ 45” 25.19 Hercules
2021 Jan 27 17h 30m 06s +29° 51’ 47” 25.19 Hercules