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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 Cetus on June, 25 2017
High Precision Live Sky Chart
03h 02m 06s
+07° 48’ 23”
21.87
 = 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: 82.2°
Max altitude: 46.3°
Azimuth: 277.8°

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 Jun 18 21.02 02h 46m 49s +07° 28’ 21” Cetus
2017 Jun 19 21.14 02h 49m 05s +07° 31’ 41” Cetus
2017 Jun 20 21.26 02h 51m 19s +07° 34’ 54” Cetus
2017 Jun 21 21.39 02h 53m 31s +07° 37’ 54” Cetus
2017 Jun 22 21.51 02h 55m 42s +07° 40’ 46” Cetus
2017 Jun 23 21.63 02h 57m 51s +07° 43’ 28” Cetus
2017 Jun 24 21.75 03h 00m 00s +07° 46’ 00” Cetus
2017 Jun 25 21.87 03h 02m 06s +07° 48’ 23” Cetus
2017 Jun 26 21.98 03h 04m 09s +07° 50’ 35” Cetus
2017 Jun 27 22.10 03h 06m 12s +07° 52’ 37” Cetus
2017 Jun 28 22.22 03h 08m 13s +07° 54’ 32” Cetus
2017 Jun 29 22.33 03h 10m 14s +07° 56’ 16” Cetus
2017 Jun 30 22.45 03h 12m 11s +07° 57’ 51” Cetus
2017 Jul 01 22.56 03h 14m 08s +07° 59’ 16” 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 12 March 2017 00:00 UTC (JD: 2457825.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00226867
Orbit inclination i 14.55383342°
Perihelion distance q 0.90060921 AU
134,729,221 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 03:21:57
2,457,853.6402 JD
Argument of perihelion peri 152.47472861604°
Longitude of the ascending node node 142.73071037561°
Mean anomaly M -0.0035065747638078°
Mean motion n 0.00012461°/day
Closest approach to Earth* 2017-Mar-18
Distance of closest approach* 1.32257646 AU
197,854,622 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.