The Solar System at your Fingertips
Comets » 

Comet C/2013 A1 (Siding Spring)

Available Resources

Comet C/2013 A1 (Siding Spring) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2013 A1 (Siding Spring) 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/2013 A1 (Siding Spring) in Ursa Major on January, 24 2018
High Precision Live Sky Chart
11h 08m 03s
+40° 23’ 58”
22.98
 = 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/2013 A1 (Siding Spring) Rise and Set Times

Comet C/2013 A1 (Siding Spring) is circumpolar from Greenwich, United Kingdom [change] and transits at 02:54 UTC (altitude: 78.9°)

Comet C/2013 A1 (Siding Spring) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2013 A1 (Siding Spring) with respect of the Sun and the orbits of the major planets. The position of Comet C/2013 A1 (Siding Spring) 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/2013 A1 (Siding Spring)
View Comet C/2013 A1 (Siding Spring) in the 3D Solar System Simulator

Comet C/2013 A1 (Siding Spring) Ephemeris

The following table lists the ephemerides of Comet C/2013 A1 (Siding Spring) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2013 A1 (Siding Spring) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2018 Jan 17 22.96 11h 10m 54s +40° 00’ 02” Ursa Major
2018 Jan 18 22.97 11h 10m 32s +40° 03’ 30” Ursa Major
2018 Jan 19 22.97 11h 10m 08s +40° 06’ 59” Ursa Major
2018 Jan 20 22.97 11h 09m 43s +40° 10’ 26” Ursa Major
2018 Jan 21 22.97 11h 09m 20s +40° 13’ 50” Ursa Major
2018 Jan 22 22.98 11h 08m 54s +40° 17’ 15” Ursa Major
2018 Jan 23 22.98 11h 08m 30s +40° 20’ 38” Ursa Major
2018 Jan 24 22.98 11h 08m 03s +40° 23’ 58” Ursa Major
2018 Jan 25 22.98 11h 07m 37s +40° 27’ 17” Ursa Major
2018 Jan 26 22.98 11h 07m 11s +40° 30’ 35” Ursa Major
2018 Jan 27 22.99 11h 06m 45s +40° 33’ 51” Ursa Major
2018 Jan 28 22.99 11h 06m 18s +40° 37’ 05” Ursa Major
2018 Jan 29 22.99 11h 05m 51s +40° 40’ 18” Ursa Major
2018 Jan 30 23.00 11h 05m 22s +40° 43’ 27” Ursa Major

Distance of Comet C/2013 A1 (Siding Spring) from Earth

The following chart shows the distance of Comet C/2013 A1 (Siding Spring) 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/2013 A1 (Siding Spring) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2013 A1 (Siding Spring) from Earth between January 2013 and December 2075

Light Curve of Comet C/2013 A1 (Siding Spring)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2013 A1 (Siding Spring), 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/2013 A1 (Siding Spring) between January 2013 and December 2075

Comet C/2013 A1 (Siding Spring) Orbital Elements

The following table lists the orbital elements of Comet C/2013 A1 (Siding Spring) at epoch 01 April 2016 00:00 UTC (JD: 2457480.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00008553
Orbit inclination i 129.03291761°
Perihelion distance q 1.39976499 AU
209,401,862 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2014-Oct-25 04:13:10
2,456,955.6758 JD
Argument of perihelion peri 2.4491694821387°
Longitude of the ascending node node 300.99940992437°
Mean anomaly M 0.00024704994536109°
Mean motion n 0.00000047°/day
Closest approach to Earth* 2014-Sep-05
Distance of closest approach* 0.89102368 AU
133,295,246 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.