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Comet 205P/Giacobini

Comet 205P/Giacobini is currently in the constellation of Serpens. The current Right Ascension of Comet 205P/Giacobini is 15h 33m 54s and the Declination is -00° 19’ 35” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]).

Summary of key facts about Comet 205P/Giacobini [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]:

15h 33m 54s
-00° 19’ 35”

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Additional information about Comet 205P/Giacobini available on TheSkyLive:

Available Resources

Comet 205P/Giacobini Position and Finder Charts

Below we provide Comet 205P/Giacobini 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 205P/Giacobini in Serpens on May, 06 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Comet 205P/Giacobini in Serpens on May, 06 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 205P/Giacobini is right now. Click on the image to see a more detailed fullscreen tracker view.

RA: 15h 33m 54s
Dec: -00° 19’ 35”
Deep sky finder chart for Comet 205P/Giacobini
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet 205P/Giacobini?, a page that provides all the information needed to find Comet 205P/Giacobini in the sky and additional links to sky charts.

Comet 205P/Giacobini Distance from Earth

The distance of Comet 205P/Giacobini from Earth is currently 268,981,282 kilometers, equivalent to 1.798029 Astronomical Units. Light takes 14 minutes and 57.2250 seconds to travel from Comet 205P/Giacobini and arrive to us.

14 minutes and 57.2250 seconds

The following chart shows the distance of Comet 205P/Giacobini 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 205P/Giacobini 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 205P/Giacobini from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet 205P/Giacobini to Earth

Between January 2013 and December 2100, the closest approach of Comet 205P/Giacobini to Earth happens on Tue Aug 22 2028 at a distance of 0.609784 Astronomical Units, or 91,222,329 kilometers:

Tue Aug 22 2028

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

Comet 205P/Giacobini brightness

The current visual magnitude of Comet 205P/Giacobini is -100.00.


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.

Comet 205P/Giacobini 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 205P/Giacobini rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.3°
Max altitude: 38.1°
Azimuth: 269.7°

The rise and set times are defined as the time at which the upper limb of Comet 205P/Giacobini 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 205P/Giacobini 15 Days Ephemeris

The following table lists the ephemerides of Comet 205P/Giacobini computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet 205P/Giacobini in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Apr 29 15h 39m 30s -01° 25’ 30” N.A. Serpens
2021 Apr 30 15h 38m 48s -01° 16’ 28” N.A. Serpens
2021 May 01 15h 38m 05s -01° 07’ 29” N.A. Serpens
2021 May 02 15h 37m 22s -00° 58’ 32” N.A. Serpens
2021 May 03 15h 36m 35s -00° 49’ 39” N.A. Serpens
2021 May 04 15h 35m 49s -00° 40’ 46” N.A. Serpens
2021 May 05 15h 35m 03s -00° 31’ 59” N.A. Serpens
2021 May 06 15h 34m 15s -00° 23’ 16” N.A. Serpens
2021 May 07 15h 33m 26s -00° 14’ 35” N.A. Serpens
2021 May 08 15h 32m 38s -00° 06’ 02” N.A. Serpens
2021 May 09 15h 31m 47s +00° 02’ 26” N.A. Serpens
2021 May 10 15h 30m 57s +00° 10’ 50” N.A. Serpens
2021 May 11 15h 30m 06s +00° 19’ 06” N.A. Serpens
2021 May 12 15h 29m 15s +00° 27’ 18” N.A. Serpens