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🌎  Observing from: Greenwich, United Kingdom [change]

Comet 19P/Borrelly

Comet 19P/Borrelly is currently in the constellation of Bootes. The current Right Ascension of Comet 19P/Borrelly is 14h 49m 22s and the Declination is +11° 27’ 55” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 19P/Borrelly is 20.86 (JPL).

Summary of key facts about Comet 19P/Borrelly [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

14h 49m 22s
+11° 27’ 55”
  • 19P/Borrelly is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West-South-West direction at an altitude of 31° above the horizon.
  • Given its current magnitude, 19P/Borrelly is visible only through long exposure photography.
  • See also 19P/Borrelly rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Comet 19P/Borrelly available on TheSkyLive:

Available Resources

Comet 19P/Borrelly Position and Finder Charts

Below we provide Comet 19P/Borrelly finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Comet 19P/Borrelly in Bootes on January, 29 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 19P/Borrelly in Bootes on January, 29 2023
Field of view: 10x6 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]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet 19P/Borrelly is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 14h 49m 22s
Dec: +11° 27’ 55”
Deep sky finder chart for Comet 19P/Borrelly
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 19P/Borrelly?, a page that provides all the information needed to find Comet 19P/Borrelly in the sky and additional links to sky charts.

Comet 19P/Borrelly Distance from Earth

The distance of Comet 19P/Borrelly from Earth is currently 503,425,129 kilometers, equivalent to 3.365189 Astronomical Units. Light takes 27 minutes and 59.2455 seconds to travel from Comet 19P/Borrelly and arrive to us.

27 minutes and 59.2455 seconds

The following chart shows the distance of Comet 19P/Borrelly 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 19P/Borrelly 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 19P/Borrelly from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 19P/Borrelly to Earth

Between January 2013 and December 2100, the closest approach of Comet 19P/Borrelly to Earth happens on Wed Dec 6 2028 at a distance of 0.414136 Astronomical Units, or 61,953,874 kilometers:

Wed Dec 6 2028

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

Comet 19P/Borrelly brightness

The current visual magnitude of Comet 19P/Borrelly is 20.86.


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 behavior 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 19P/Borrelly, 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 19P/Borrelly between January 2013 and December 2100

Comet 19P/Borrelly rise and set times

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

Today's Comet 19P/Borrelly rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 78.5°
Max altitude: 50.0°
Azimuth: 281.5°

The rise and set times are defined as the time at which the upper limb of Comet 19P/Borrelly touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet 19P/Borrelly Orbital Elements

The following table lists the orbital elements of Comet 19P/Borrelly at epoch 09 February 2021 00:00 UTC (JD: 2459255.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.63794908
Orbit inclination i 29.32349908°
Perihelion distance q 1.30589761 AU
195,359,503 km
Aphelion distance Q 5.90799157 AU
883,822,961 km
Semi-major axis a 3.60694459 AU
539,591,232 km
Orbital period period 6.8504 years
2,502.1171 days
Date of perihelion transit Tp 2022-Feb-01 18:03:22
2,459,612.2523 JD
Next perihelion transit 2028-Dec-08 20:52
2,462,114.3695 JD
Argument of perihelion peri 351.85637184474°
Longitude of the ascending node node 74.310740143697°
Mean anomaly M 308.67113065509°
Mean motion n 0.14387816°/day

Visualization of Comet 19P/Borrelly Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 19P/Borrelly with respect of the Sun and the orbits of the major planets. The position of Comet 19P/Borrelly 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 19P/Borrelly
View Comet 19P/Borrelly in the 3D Solar System Simulator

Comet 19P/Borrelly 15 Days Ephemeris

The following table lists the ephemerides of Comet 19P/Borrelly computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 19P/Borrelly in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Jan 22 14h 46m 11s +11° 05’ 43” 20.82 Bootes
2023 Jan 23 14h 46m 41s +11° 08’ 21” 20.82 Bootes
2023 Jan 24 14h 47m 08s +11° 11’ 06” 20.83 Bootes
2023 Jan 25 14h 47m 35s +11° 13’ 58” 20.84 Bootes
2023 Jan 26 14h 48m 02s +11° 16’ 57” 20.84 Bootes
2023 Jan 27 14h 48m 26s +11° 20’ 03” 20.85 Bootes
2023 Jan 28 14h 48m 51s +11° 23’ 14” 20.85 Bootes
2023 Jan 29 14h 49m 14s +11° 26’ 34” 20.86 Bootes
2023 Jan 30 14h 49m 35s +11° 29’ 58” 20.86 Bootes
2023 Jan 31 14h 49m 55s +11° 33’ 30” 20.87 Bootes
2023 Feb 01 14h 50m 16s +11° 37’ 09” 20.88 Bootes
2023 Feb 02 14h 50m 34s +11° 40’ 53” 20.88 Bootes
2023 Feb 03 14h 50m 52s +11° 44’ 44” 20.89 Bootes
2023 Feb 04 14h 51m 07s +11° 48’ 39” 20.89 Bootes