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Comet 23P/Brorsen-Metcalf

Comet 23P/Brorsen-Metcalf is currently in the constellation of Scorpius. The current Right Ascension of Comet 23P/Brorsen-Metcalf is 17h 24m 58s and the Declination is -37° 55’ 29” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet 23P/Brorsen-Metcalf is 27.62 (JPL).

Summary of key facts about Comet 23P/Brorsen-Metcalf [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]:

17h 24m 58s
-37° 55’ 29”

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Additional information about Comet 23P/Brorsen-Metcalf available on TheSkyLive:

Available Resources

Comet 23P/Brorsen-Metcalf Position and Finder Charts

Below we provide Comet 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf in Scorpius on January, 23 2021
Field of view: 50x30 degrees
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Map showing Comet 23P/Brorsen-Metcalf in Scorpius on January, 23 2021
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 23P/Brorsen-Metcalf is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 17h 24m 58s
Dec: -37° 55’ 29”
Deep sky finder chart for Comet 23P/Brorsen-Metcalf
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 23P/Brorsen-Metcalf?, a page that provides all the information needed to find Comet 23P/Brorsen-Metcalf in the sky and additional links to sky charts.

Comet 23P/Brorsen-Metcalf Distance from Earth

The distance of Comet 23P/Brorsen-Metcalf from Earth is currently 5,075,614,953 kilometers, equivalent to 33.928390 Astronomical Units. Light takes 4 hours, 42 minutes and 10.4291 seconds to travel from Comet 23P/Brorsen-Metcalf and arrive to us.

4 hours, 42 minutes and 10.4291 seconds

The following chart shows the distance of Comet 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 23P/Brorsen-Metcalf to Earth

Between January 2013 and December 2100, the closest approach of Comet 23P/Brorsen-Metcalf to Earth happens on Tue Jun 10 2059 at a distance of 1.485167 Astronomical Units, or 222,177,784 kilometers:

Tue Jun 10 2059

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

Comet 23P/Brorsen-Metcalf brightness

The current visual magnitude of Comet 23P/Brorsen-Metcalf is 27.62.


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 23P/Brorsen-Metcalf, 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 23P/Brorsen-Metcalf between January 2013 and December 2100

Comet 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 127.9°
Max altitude: 0.6°
Azimuth: 232.1°

The rise and set times are defined as the time at which the upper limb of Comet 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf Orbital Elements

The following table lists the orbital elements of Comet 23P/Brorsen-Metcalf at epoch 30 September 1989 00:00 UTC (JD: 2447800.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.97195226
Orbit inclination i 19.33394047°
Perihelion distance q 0.47875271 AU
71,620,386 km
Aphelion distance Q 33.65966096 AU
5,035,413,618 km
Semi-major axis a 17.06920683 AU
2,553,517,002 km
Orbital period period 70.5200 years
25,758.3736 days
Date of perihelion transit Tp 1989-Sep-11 22:29:54
2,447,781.4374 JD
Next perihelion transit 2060-Mar-21 07:27
2,473,539.8111 JD
Argument of perihelion peri 129.61068367887°
Longitude of the ascending node node 311.58546221411°
Mean anomaly M 0.26641915255031°
Mean motion n 0.01397604°/day

Visualization of Comet 23P/Brorsen-Metcalf Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet 23P/Brorsen-Metcalf with respect of the Sun and the orbits of the major planets. The position of Comet 23P/Brorsen-Metcalf 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 23P/Brorsen-Metcalf
View Comet 23P/Brorsen-Metcalf in the 3D Solar System Simulator

Comet 23P/Brorsen-Metcalf 15 Days Ephemeris

The following table lists the ephemerides of Comet 23P/Brorsen-Metcalf computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 23P/Brorsen-Metcalf in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 16 17h 24m 01s -37° 52’ 46” 27.63 Scorpius
2021 Jan 17 17h 24m 08s -37° 53’ 07” 27.63 Scorpius
2021 Jan 18 17h 24m 15s -37° 53’ 26” 27.63 Scorpius
2021 Jan 19 17h 24m 24s -37° 53’ 48” 27.63 Scorpius
2021 Jan 20 17h 24m 30s -37° 54’ 09” 27.63 Scorpius
2021 Jan 21 17h 24m 38s -37° 54’ 29” 27.63 Scorpius
2021 Jan 22 17h 24m 46s -37° 54’ 51” 27.63 Scorpius
2021 Jan 23 17h 24m 52s -37° 55’ 13” 27.62 Scorpius
2021 Jan 24 17h 25m 00s -37° 55’ 35” 27.62 Scorpius
2021 Jan 25 17h 25m 06s -37° 55’ 58” 27.62 Scorpius
2021 Jan 26 17h 25m 14s -37° 56’ 20” 27.62 Scorpius
2021 Jan 27 17h 25m 19s -37° 56’ 43” 27.62 Scorpius
2021 Jan 28 17h 25m 27s -37° 57’ 06” 27.62 Scorpius
2021 Jan 29 17h 25m 32s -37° 57’ 29” 27.62 Scorpius