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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 Pisces on April, 27 2017
High Precision Live Sky Chart
00h 01m 45s
+00° 20’ 48”
15.93
 = 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: 89.7°
Max altitude: 38.9°
Azimuth: 270.3°

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 Apr 20 15.69 23h 30m 52s -01° 12’ 18” Pisces
2017 Apr 21 15.72 23h 35m 26s -00° 58’ 41” Pisces
2017 Apr 22 15.75 23h 39m 56s -00° 45’ 10” Pisces
2017 Apr 23 15.78 23h 44m 22s -00° 31’ 45” Pisces
2017 Apr 24 15.82 23h 48m 47s -00° 18’ 25” Pisces
2017 Apr 25 15.85 23h 53m 09s -00° 05’ 13” Pisces
2017 Apr 26 15.89 23h 57m 29s +00° 07’ 50” Pisces
2017 Apr 27 15.93 00h 01m 45s +00° 20’ 48” Pisces
2017 Apr 28 15.97 00h 05m 58s +00° 33’ 37” Pisces
2017 Apr 29 16.01 00h 10m 09s +00° 46’ 18” Pisces
2017 Apr 30 16.05 00h 14m 17s +00° 58’ 50” Pisces
2017 May 01 16.09 00h 18m 23s +01° 11’ 13” Pisces
2017 May 02 16.14 00h 22m 24s +01° 23’ 27” Pisces
2017 May 03 16.18 00h 26m 25s +01° 35’ 31” Pisces

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 2014 and January 2035

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 2014 and January 2035

Comet C/2017 E1 (Borisov) Orbital Elements

The following table lists the orbital elements of Comet C/2017 E1 (Borisov) at epoch 02 March 2017 00:00 UTC (JD: 2457815.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00000000
Orbit inclination i 14.55340528°
Perihelion distance q 0.89935347 AU
134,541,364 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 05:35:10
2,457,853.7328 JD
Argument of perihelion peri 152.64498740168°
Longitude of the ascending node node 142.71127052268°
Mean anomaly M °
Mean motion n 0.00000000°/day
Closest approach to Earth* 2017-Mar-18
Distance of closest approach* 1.32192320 AU
197,756,896 km

* NOTE: values for the closest approach are computed for the time interval between 2014-Jan-01 and 2035-Jan-01, with a sampling interval of 1 day.