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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 Orion on October, 16 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
05h 20m 33s
+08° 01’ 58”
-
37.15
-

The Observed Magnitude and Coma Diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behvior of comets. When available please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

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 Europe/London timezone.

Azimuth: 82.0°
Max altitude: 46.6°
Azimuth: 278.0°

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 Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Oct 09 05h 22m 14s +08° 17’ 09” 37.07 Orion
2018 Oct 10 05h 22m 01s +08° 15’ 03” 37.08 Orion
2018 Oct 11 05h 21m 50s +08° 12’ 57” 37.09 Orion
2018 Oct 12 05h 21m 37s +08° 10’ 51” 37.11 Orion
2018 Oct 13 05h 21m 23s +08° 08’ 47” 37.12 Orion
2018 Oct 14 05h 21m 09s +08° 06’ 42” 37.13 Orion
2018 Oct 15 05h 20m 53s +08° 04’ 37” 37.14 Orion
2018 Oct 16 05h 20m 38s +08° 02’ 34” 37.15 Orion
2018 Oct 17 05h 20m 21s +08° 00’ 29” 37.16 Orion
2018 Oct 18 05h 20m 04s +07° 58’ 27” 37.17 Orion
2018 Oct 19 05h 19m 48s +07° 56’ 26” 37.19 Orion
2018 Oct 20 05h 19m 30s +07° 54’ 24” 37.20 Orion
2018 Oct 21 05h 19m 10s +07° 52’ 23” 37.21 Orion
2018 Oct 22 05h 18m 51s +07° 50’ 23” 37.22 Orion

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.