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Comet C/2017 B3 (LINEAR)

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Comet C/2017 B3 (LINEAR) Position

Comet C/2017 B3 (LINEAR) is currently in the constellation of Grus. The current Right Ascension is 23h 02m 23s and the Declination is -40° 17’ 10”.

23h 02m 23s
-40° 17’ 10”

Simplified sky chart showing where Comet C/2017 B3 (LINEAR) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2017 B3 (LINEAR) in Grus on October, 15 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/2017 B3 (LINEAR) is right now (view fullscreen)

C/2017 B3 (LINEAR)
RA: 23h 02m 23s
Dec: -40° 17’ 10”
Deep sky finder chart for Comet C/2017 B3 (LINEAR)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2017 B3 (LINEAR)?, a page that provides all the information needed to find Comet C/2017 B3 (LINEAR) in the sky and additional links to sky charts.

Comet C/2017 B3 (LINEAR) Distance

The distance of Comet C/2017 B3 (LINEAR) from Earth is currently 581,016,344 kilometers, equivalent to 3.883854 Astronomical Units. Light takes 32 minutes and 18.0619 seconds to travel from Comet C/2017 B3 (LINEAR) and arrive to us.

32 minutes and 18.0619 seconds

The following chart shows the distance of Comet C/2017 B3 (LINEAR) 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/2017 B3 (LINEAR) 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/2017 B3 (LINEAR) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2017 B3 (LINEAR) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2017 B3 (LINEAR) to Earth happens on Tue Aug 20 2019 at a distance of 3.48026831 Astronomical Units, or 520,640,730 kilometers:

Tue Aug 20 2019

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

Comet C/2017 B3 (LINEAR) brightness

The current visual magnitude of Comet C/2017 B3 (LINEAR) is 15.77.


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/2017 B3 (LINEAR), 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 B3 (LINEAR) between January 2013 and December 2100

Comet C/2017 B3 (LINEAR) rise and set times

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

Comet C/2017 B3 (LINEAR) is currently not visible from Greenwich, United Kingdom [change]

The rise and set times are defined as the time at which the upper limb of Comet C/2017 B3 (LINEAR) 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/2017 B3 (LINEAR) Orbital Elements

The following table lists the orbital elements of Comet C/2017 B3 (LINEAR) at epoch 18 February 2018 00:00 UTC (JD: 2458168.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.00221527
Orbit inclination i 54.18291388°
Perihelion distance q 3.92188588 AU
586,705,777 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2019-Feb-02 07:31:17
2,458,516.8134 JD
Argument of perihelion peri 284.70529076687°
Longitude of the ascending node node 2.18968307034°
Mean anomaly M -0.0046086410419649°
Mean motion n 0.00001323°/day

Visualization of Comet C/2017 B3 (LINEAR) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2017 B3 (LINEAR) with respect of the Sun and the orbits of the major planets. The position of Comet C/2017 B3 (LINEAR) 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 B3 (LINEAR)
View Comet C/2017 B3 (LINEAR) in the 3D Solar System Simulator

Comet C/2017 B3 (LINEAR) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2017 B3 (LINEAR) 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 B3 (LINEAR) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Oct 08 23h 07m 54s -41° 35’ 12” 15.68 Grus
2019 Oct 09 23h 07m 06s -41° 25’ 14” 15.70 Grus
2019 Oct 10 23h 06m 20s -41° 15’ 06” 15.71 Grus
2019 Oct 11 23h 05m 34s -41° 04’ 53” 15.72 Grus
2019 Oct 12 23h 04m 50s -40° 54’ 30” 15.73 Grus
2019 Oct 13 23h 04m 06s -40° 44’ 02” 15.74 Grus
2019 Oct 14 23h 03m 24s -40° 33’ 25” 15.75 Grus
2019 Oct 15 23h 02m 44s -40° 22’ 44” 15.76 Grus
2019 Oct 16 23h 02m 03s -40° 11’ 56” 15.78 Grus
2019 Oct 17 23h 01m 26s -40° 01’ 00” 15.79 Grus
2019 Oct 18 23h 00m 48s -39° 50’ 00” 15.80 Grus
2019 Oct 19 23h 00m 12s -39° 38’ 54” 15.81 Grus
2019 Oct 20 22h 59m 38s -39° 27’ 43” 15.82 Grus
2019 Oct 21 22h 59m 04s -39° 16’ 27” 15.84 Grus