Comet C/2021 O1 (Nishimura)

Comet C/2021 O1 (Nishimura) is currently in the constellation of Lupus. The current Right Ascension of Comet C/2021 O1 (Nishimura) is 15h 50m 13s and the Declination is -33° 37’ 25” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2021 O1 (Nishimura) is 19.50 (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 457,777,552 kilometers, equivalent to 3.060054 Astronomical Units. Light takes 25 minutes and 26.9815 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 2013 and December 2100, the closest approach of Comet C/2021 O1 (Nishimura) to Earth happens on Fri Aug 6 2021 at a distance of 1.696712 Astronomical Units, or 253,824,528 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 19.50.

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
2022 May 11	15h 58m 32s	-33° 39’ 38”	19.37	Lupus
2022 May 12	15h 57m 24s	-33° 39’ 42”	19.39	Lupus
2022 May 13	15h 56m 14s	-33° 39’ 39”	19.41	Lupus
2022 May 14	15h 55m 05s	-33° 39’ 29”	19.42	Lupus
2022 May 15	15h 53m 57s	-33° 39’ 11”	19.44	Lupus
2022 May 16	15h 52m 49s	-33° 38’ 47”	19.46	Lupus
2022 May 17	15h 51m 41s	-33° 38’ 16”	19.48	Lupus
2022 May 18	15h 50m 34s	-33° 37’ 36”	19.50	Lupus
2022 May 19	15h 49m 26s	-33° 36’ 51”	19.51	Lupus
2022 May 20	15h 48m 19s	-33° 36’ 00”	19.53	Lupus
2022 May 21	15h 47m 12s	-33° 35’ 02”	19.55	Lupus
2022 May 22	15h 46m 05s	-33° 33’ 56”	19.57	Lupus
2022 May 23	15h 45m 01s	-33° 32’ 45”	19.59	Lupus
2022 May 24	15h 43m 54s	-33° 31’ 29”	19.61	Lupus