Comet C/2021 O1 (Nishimura)

Comet C/2021 O1 (Nishimura) is currently in the constellation of Libra. The current Right Ascension of Comet C/2021 O1 (Nishimura) is 15h 06m 59s and the Declination is -16° 36’ 08” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2021 O1 (Nishimura) is 16.40 (JPL).

Summary of key facts about Comet C/2021 O1 (Nishimura) [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]:

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Additional information about Comet C/2021 O1 (Nishimura) available on TheSkyLive:

Available Resources

• Position and finder charts (see also Where is Comet C/2021 O1 (Nishimura)?)
• Distance from Earth (see also How far is Comet C/2021 O1 (Nishimura) from Earth?)
• Rise and set times (see also When does Comet C/2021 O1 (Nishimura) rise and set?)
• Brightness (see also How bright is Comet C/2021 O1 (Nishimura)?)
• Orbital elements. Detailed information about Comet C/2021 O1 (Nishimura) orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Comet C/2021 O1 (Nishimura) with respect to the major Solar System objects.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Comet C/2021 O1 (Nishimura) for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Comet C/2021 O1 (Nishimura) in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Comet C/2021 O1 (Nishimura) with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2021 O1 (Nishimura) is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Comet C/2021 O1 (Nishimura)?, a page that provides all the information needed to find Comet C/2021 O1 (Nishimura) in the sky and additional links to sky charts.

Comet C/2021 O1 (Nishimura) Distance from Earth

The distance of Comet C/2021 O1 (Nishimura) from Earth is currently 437,164,839 kilometers, equivalent to 2.922266 Astronomical Units. Light takes 24 minutes and 18.2249 seconds to travel from Comet C/2021 O1 (Nishimura) and arrive to us.

The following chart shows the distance of Comet C/2021 O1 (Nishimura) 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.

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/2021 O1 (Nishimura) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2021 O1 (Nishimura) to Earth

Between January 2014 and January 2100, the closest approach of Comet C/2021 O1 (Nishimura) to Earth happens on Fri Aug 6 2021 at a distance of 1.696715 Astronomical Units, or 253,825,018 kilometers:

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

Comet C/2021 O1 (Nishimura) brightness

The current visual magnitude of Comet C/2021 O1 (Nishimura) is 16.40.

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 C/2021 O1 (Nishimura), 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.

Comet C/2021 O1 (Nishimura) rise and set times

Today's Comet C/2021 O1 (Nishimura) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

The rise and set times are defined as the time at which the upper limb of Comet C/2021 O1 (Nishimura) 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.

Visualization of Comet C/2021 O1 (Nishimura) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2021 O1 (Nishimura) with respect of the Sun and the orbits of the major planets. The position of Comet C/2021 O1 (Nishimura) 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!

Comet C/2021 O1 (Nishimura) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2021 O1 (Nishimura) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2021 O1 (Nishimura) in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2021 Nov 24	14h 53m 20s	-14° 52’ 23”	16.12	Libra
2021 Nov 25	14h 55m 09s	-15° 06’ 29”	16.16	Libra
2021 Nov 26	14h 56m 57s	-15° 20’ 26”	16.19	Libra
2021 Nov 27	14h 58m 45s	-15° 34’ 10”	16.23	Libra
2021 Nov 28	15h 00m 33s	-15° 47’ 44”	16.27	Libra
2021 Nov 29	15h 02m 20s	-16° 01’ 09”	16.30	Libra
2021 Nov 30	15h 04m 05s	-16° 14’ 21”	16.34	Libra
2021 Dec 01	15h 05m 49s	-16° 27’ 24”	16.38	Libra
2021 Dec 02	15h 07m 33s	-16° 40’ 18”	16.41	Libra
2021 Dec 03	15h 09m 16s	-16° 53’ 03”	16.45	Libra
2021 Dec 04	15h 10m 59s	-17° 05’ 36”	16.48	Libra
2021 Dec 05	15h 12m 41s	-17° 18’ 01”	16.51	Libra
2021 Dec 06	15h 14m 21s	-17° 30’ 16”	16.55	Libra
2021 Dec 07	15h 16m 00s	-17° 42’ 23”	16.58	Libra