The Solar System at your Fingertips
Comets » 

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 December, 14 2017
High Precision Live Sky Chart
03h 16m 47s
-01° 20’ 45”
29.52
 = 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: 91.3°
Max altitude: 37.2°
Azimuth: 268.7°

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 Dec 07 29.21 03h 21m 14s -01° 34’ 36” Eridanus
2017 Dec 08 29.25 03h 20m 31s -01° 33’ 02” Eridanus
2017 Dec 09 29.30 03h 19m 51s -01° 31’ 18” Eridanus
2017 Dec 10 29.34 03h 19m 13s -01° 29’ 26” Eridanus
2017 Dec 11 29.39 03h 18m 34s -01° 27’ 28” Eridanus
2017 Dec 12 29.43 03h 17m 57s -01° 25’ 21” Eridanus
2017 Dec 13 29.48 03h 17m 22s -01° 23’ 07” Eridanus
2017 Dec 14 29.52 03h 16m 47s -01° 20’ 45” Eridanus
2017 Dec 15 29.57 03h 16m 14s -01° 18’ 17” Eridanus
2017 Dec 16 29.62 03h 15m 42s -01° 15’ 43” Cetus
2017 Dec 17 29.66 03h 15m 11s -01° 13’ 01” Cetus
2017 Dec 18 29.71 03h 14m 42s -01° 10’ 14” Cetus
2017 Dec 19 29.75 03h 14m 13s -01° 07’ 19” Cetus
2017 Dec 20 29.80 03h 13m 45s -01° 04’ 19” Cetus

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 15 March 2017 00:00 UTC (JD: 2457828.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00257617
Orbit inclination i 14.55412836°
Perihelion distance q 0.90066296 AU
134,737,262 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 03:19:37
2,457,853.6386 JD
Argument of perihelion peri 152.47340324485°
Longitude of the ascending node node 142.73290487938°
Mean anomaly M -0.0037902087958564°
Mean motion n 0.00015077°/day
Closest approach to Earth* 2017-Mar-18
Distance of closest approach* 1.32266375 AU
197,867,681 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.