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Comet C/2015 X7 (ATLAS)

Available Resources

Comet C/2015 X7 (ATLAS) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2015 X7 (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/2015 X7 (ATLAS) in Corona Borealis on December, 16 2018
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 54m 44s
+34° 05’ 32”

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/2015 X7 (ATLAS) Rise and Set Times

Today's Comet C/2015 X7 (ATLAS) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 55.9°
Max altitude: 72.6°
Azimuth: 304.1°

Comet C/2015 X7 (ATLAS) Orbit Diagram

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) 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
2018 Dec 09 15h 49m 46s +33° 59’ 43” 22.40 Corona Borealis
2018 Dec 10 15h 50m 30s +34° 00’ 16” 22.41 Corona Borealis
2018 Dec 11 15h 51m 11s +34° 00’ 56” 22.41 Corona Borealis
2018 Dec 12 15h 51m 55s +34° 01’ 41” 22.41 Corona Borealis
2018 Dec 13 15h 52m 36s +34° 02’ 30” 22.42 Corona Borealis
2018 Dec 14 15h 53m 20s +34° 03’ 25” 22.42 Corona Borealis
2018 Dec 15 15h 54m 02s +34° 04’ 26” 22.42 Corona Borealis
2018 Dec 16 15h 54m 43s +34° 05’ 31” 22.43 Corona Borealis
2018 Dec 17 15h 55m 24s +34° 06’ 42” 22.43 Corona Borealis
2018 Dec 18 15h 56m 07s +34° 07’ 57” 22.43 Corona Borealis
2018 Dec 19 15h 56m 48s +34° 09’ 18” 22.44 Corona Borealis
2018 Dec 20 15h 57m 29s +34° 10’ 42” 22.44 Corona Borealis
2018 Dec 21 15h 58m 09s +34° 12’ 12” 22.44 Corona Borealis
2018 Dec 22 15h 58m 50s +34° 13’ 49” 22.45 Corona Borealis

Distance of Comet C/2015 X7 (ATLAS) from Earth

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

Distance of Comet C/2015 X7 (ATLAS) from Earth between January 2013 and December 2075

Light Curve of Comet C/2015 X7 (ATLAS)

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 2075

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
Closest approach to Earth* 2017-Feb-08
Distance of closest approach* 3.19175068 AU
477,479,106 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.