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Comet C/2015 D4 (Borisov)

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Comet C/2015 D4 (Borisov) Position

Comet C/2015 D4 (Borisov) is currently in the constellation of Ursa Minor. The current Right Ascension is 07h 16m 37s and the Declination is +87° 57’ 20”.

07h 16m 37s
+87° 57’ 20”

Simplified sky chart showing where Comet C/2015 D4 (Borisov) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2015 D4 (Borisov) in Ursa Minor on June, 24 2019
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Hihgher precision deep sky finder chart showing where Comet C/2015 D4 (Borisov) is right now (view fullscreen)

C/2015 D4 (Borisov)
RA: 07h 16m 37s
Dec: +87° 57’ 20”
Deep sky finder chart for Comet C/2015 D4 (Borisov)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2015 D4 (Borisov)?, a page that provides all the information needed to find Comet C/2015 D4 (Borisov) in the sky and additional links to sky charts.

Comet C/2015 D4 (Borisov) Distance

The distance of Comet C/2015 D4 (Borisov) from Earth is currently 2,235,989,283 kilometers, equivalent to 14.946665 Astronomical Units. Light takes 2 hours, 4 minutes and 18.4574 seconds to travel from Comet C/2015 D4 (Borisov) and arrive to us.

2 hours, 4 minutes and 18.4574 seconds

The following chart shows the distance of Comet C/2015 D4 (Borisov) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2015 D4 (Borisov) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2015 D4 (Borisov) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2015 D4 (Borisov) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2015 D4 (Borisov) to Earth happens on Wed Oct 22 2014 at a distance of 1.39050711 Astronomical Units, or 208,016,903 kilometers:

Wed Oct 22 2014

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2015 D4 (Borisov) brightness

The current visual magnitude of Comet C/2015 D4 (Borisov) is 33.87.


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.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2015 D4 (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/2015 D4 (Borisov) between January 2013 and December 2100

Comet C/2015 D4 (Borisov) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Comet C/2015 D4 (Borisov) is circumpolar and transits at 13:07 UTC (altitude: 53.5°)

The rise and set times are defined as the time at which the upper limb of Comet C/2015 D4 (Borisov) touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2015 D4 (Borisov) Orbital Elements

The following table lists the orbital elements of Comet C/2015 D4 (Borisov) at epoch 29 March 2015 00:00 UTC (JD: 2457111.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.98906894
Orbit inclination i 77.30173941°
Perihelion distance q 0.86167786 AU
128,905,174 km
Aphelion distance Q 156.79504245 AU
23,456,204,533 km
Semi-major axis a 78.82836015 AU
11,792,554,854 km
Orbital period period 699.8900 years
255,636.0893 days
Date of perihelion transit Tp 2014-Oct-28 05:42:03
2,456,958.7375 JD
Next perihelion transit 2714-Sep-25 07:50
2,712,594.8268 JD
Argument of perihelion peri 314.69429020156°
Longitude of the ascending node node 305.81031552317°
Mean anomaly M 0.21512802062602°
Mean motion n 0.00140825°/day

Visualization of Comet C/2015 D4 (Borisov) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2015 D4 (Borisov) with respect of the Sun and the orbits of the major planets. The position of Comet C/2015 D4 (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/2015 D4 (Borisov)
View Comet C/2015 D4 (Borisov) in the 3D Solar System Simulator

Comet C/2015 D4 (Borisov) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2015 D4 (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/2015 D4 (Borisov) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Jun 17 06h 16m 36s +88° 05’ 57” 33.84 Ursa Minor
2019 Jun 18 06h 24m 42s +88° 05’ 07” 33.85 Ursa Minor
2019 Jun 19 06h 32m 44s +88° 04’ 10” 33.85 Ursa Minor
2019 Jun 20 06h 40m 37s +88° 03’ 11” 33.86 Ursa Minor
2019 Jun 21 06h 48m 24s +88° 02’ 05” 33.86 Ursa Minor
2019 Jun 22 06h 56m 03s +88° 00’ 56” 33.86 Ursa Minor
2019 Jun 23 07h 03m 34s +87° 59’ 42” 33.87 Ursa Minor
2019 Jun 24 07h 10m 58s +87° 58’ 23” 33.87 Ursa Minor
2019 Jun 25 07h 18m 12s +87° 57’ 02” 33.87 Ursa Minor
2019 Jun 26 07h 25m 19s +87° 55’ 36” 33.88 Ursa Minor
2019 Jun 27 07h 32m 18s +87° 54’ 06” 33.88 Ursa Minor
2019 Jun 28 07h 39m 08s +87° 52’ 33” 33.89 Ursa Minor
2019 Jun 29 07h 45m 51s +87° 50’ 57” 33.89 Ursa Minor
2019 Jun 30 07h 52m 24s +87° 49’ 18” 33.89 Ursa Minor