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Comet C/2017 S6 (Catalina)

Available Resources

Comet C/2017 S6 (Catalina) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 S6 (Catalina) 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 S6 (Catalina) in Andromeda on December, 12 2017
High Precision Live Sky Chart
23h 28m 50s
+41° 06’ 54”
 = 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 S6 (Catalina) Rise and Set Times

Comet C/2017 S6 (Catalina) is circumpolar from Greenwich, United Kingdom [change] and transits at 18:02 UTC (altitude: 79.6°)

Comet C/2017 S6 (Catalina) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 S6 (Catalina) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 S6 (Catalina) 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 S6 (Catalina)
View Comet C/2017 S6 (Catalina) in the 3D Solar System Simulator

Comet C/2017 S6 (Catalina) Ephemeris

The following table lists the ephemerides of Comet C/2017 S6 (Catalina) 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 S6 (Catalina) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Dec 05 16.25 23h 56m 13s +49° 01’ 09” Cassiopeia
2017 Dec 06 16.25 23h 51m 25s +47° 51’ 38” Andromeda
2017 Dec 07 16.24 23h 46m 58s +46° 42’ 25” Andromeda
2017 Dec 08 16.23 23h 42m 48s +45° 33’ 42” Andromeda
2017 Dec 09 16.23 23h 38m 56s +44° 25’ 40” Andromeda
2017 Dec 10 16.22 23h 35m 20s +43° 18’ 25” Andromeda
2017 Dec 11 16.22 23h 31m 59s +42° 12’ 09” Andromeda
2017 Dec 12 16.22 23h 28m 50s +41° 06’ 54” Andromeda
2017 Dec 13 16.22 23h 25m 55s +40° 02’ 48” Andromeda
2017 Dec 14 16.22 23h 23m 12s +38° 59’ 56” Andromeda
2017 Dec 15 16.22 23h 20m 41s +37° 58’ 20” Andromeda
2017 Dec 16 16.22 23h 18m 20s +36° 58’ 05” Andromeda
2017 Dec 17 16.22 23h 16m 08s +35° 59’ 12” Andromeda
2017 Dec 18 16.23 23h 14m 04s +35° 01’ 44” Pegasus

Distance of Comet C/2017 S6 (Catalina) from Earth

The following chart shows the distance of Comet C/2017 S6 (Catalina) 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 S6 (Catalina) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 S6 (Catalina) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 S6 (Catalina)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 S6 (Catalina), 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 S6 (Catalina) between January 2013 and December 2075

Comet C/2017 S6 (Catalina) Orbital Elements

The following table lists the orbital elements of Comet C/2017 S6 (Catalina) at epoch 25 October 2017 00:00 UTC (JD: 2458052.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00162889
Orbit inclination i 152.82656528°
Perihelion distance q 1.54298217 AU
230,826,848 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2018-Feb-26 22:05:37
2,458,176.4206 JD
Argument of perihelion peri 134.67983654542°
Longitude of the ascending node node 130.87340130264°
Mean anomaly M -0.0041893147031051°
Mean motion n 0.00003381°/day
Closest approach to Earth* 2017-Nov-27
Distance of closest approach* 1.21170413 AU
181,268,359 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.