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Comet C/2017 E1 (Borisov)

Available Resources

Comet C/2017 E1 (Borisov) Sky Charts and Coordinates

This is a simplified sky chart, showing where Comet C/2017 E1 (Borisov) 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 E1 (Borisov) in Eridanus on October, 19 2017
High Precision Live Sky Chart
04h 07m 26s
+00° 13’ 36”
 = 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 E1 (Borisov) Rise and Set Times

Today's Comet C/2017 E1 (Borisov) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 89.8°
Max altitude: 38.7°
Azimuth: 270.2°

Comet C/2017 E1 (Borisov) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 E1 (Borisov) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 E1 (Borisov) 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 E1 (Borisov)
View Comet C/2017 E1 (Borisov) in the 3D Solar System Simulator

Comet C/2017 E1 (Borisov) Ephemeris

The following table lists the ephemerides of Comet C/2017 E1 (Borisov) 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 E1 (Borisov) in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Oct 12 29.70 04h 13m 18s +00° 55’ 18” Taurus
2017 Oct 13 29.76 04h 12m 32s +00° 49’ 08” Taurus
2017 Oct 14 29.81 04h 11m 44s +00° 43’ 00” Taurus
2017 Oct 15 29.87 04h 10m 54s +00° 36’ 57” Taurus
2017 Oct 16 29.92 04h 10m 04s +00° 30’ 59” Taurus
2017 Oct 17 29.98 04h 09m 11s +00° 25’ 05” Taurus
2017 Oct 18 30.03 04h 08m 20s +00° 19’ 18” Eridanus
2017 Oct 19 30.09 04h 07m 26s +00° 13’ 36” Eridanus
2017 Oct 20 30.14 04h 06m 32s +00° 07’ 59” Eridanus
2017 Oct 21 30.20 04h 05m 36s +00° 02’ 29” Eridanus
2017 Oct 22 30.25 04h 04m 40s -00° 02’ 53” Eridanus
2017 Oct 23 30.31 04h 03m 43s -00° 08’ 12” Eridanus
2017 Oct 24 30.36 04h 02m 45s -00° 13’ 22” Eridanus
2017 Oct 25 30.42 04h 01m 48s -00° 18’ 25” Eridanus

Distance of Comet C/2017 E1 (Borisov) from Earth

The following chart shows the distance of Comet C/2017 E1 (Borisov) 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 E1 (Borisov) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Comet C/2017 E1 (Borisov) from Earth between January 2013 and December 2075

Light Curve of Comet C/2017 E1 (Borisov)

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2017 E1 (Borisov), 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 E1 (Borisov) between January 2013 and December 2075

Comet C/2017 E1 (Borisov) Orbital Elements

The following table lists the orbital elements of Comet C/2017 E1 (Borisov) at epoch 14 March 2017 00:00 UTC (JD: 2457827.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00257383
Orbit inclination i 14.55412228°
Perihelion distance q 0.90066264 AU
134,737,213 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2017-Apr-10 03:19:36
2,457,853.6386 JD
Argument of perihelion peri 152.47334692965°
Longitude of the ascending node node 142.73291616294°
Mean anomaly M -0.0039356304767003°
Mean motion n 0.00015057°/day
Closest approach to Earth* 2017-Mar-18
Distance of closest approach* 1.32266303 AU
197,867,573 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.