Comet C/2021 A4 (NEOWISE)
Comet C/2021 A4 (NEOWISE) is currently in the constellation of Grus. The current Right Ascension of Comet C/2021 A4 (NEOWISE) is 22h 47m 57s and the Declination is -39° 21’ 07” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet C/2021 A4 (NEOWISE) is 38.29 (JPL).
Summary of key facts about Comet C/2021 A4 (NEOWISE) [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 A4 (NEOWISE) available on TheSkyLive:
Comet C/2021 A4 (NEOWISE) Position and Finder Charts
Below we provide Comet C/2021 A4 (NEOWISE) 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.
Higher precision deep sky finder chart, 60 arcmin wide, showing where Comet C/2021 A4 (NEOWISE) is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Comet C/2021 A4 (NEOWISE)?, a page that provides all the information needed to find Comet C/2021 A4 (NEOWISE) in the sky and additional links to sky charts.
Comet C/2021 A4 (NEOWISE) Distance from Earth
The distance of Comet C/2021 A4 (NEOWISE) from Earth is currently 740,098,178 kilometers, equivalent to 4.947251 Astronomical Units. Light takes 41 minutes and 8.7018 seconds to travel from Comet C/2021 A4 (NEOWISE) and arrive to us.
The following chart shows the distance of Comet C/2021 A4 (NEOWISE) 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 A4 (NEOWISE) from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest approach of Comet C/2021 A4 (NEOWISE) to Earth
Between January 2013 and December 2100, the closest approach of Comet C/2021 A4 (NEOWISE) to Earth happens on Fri Feb 12 2021 at a distance of 0.433930 Astronomical Units, or 64,915,004 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Comet C/2021 A4 (NEOWISE) brightness
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 A4 (NEOWISE), 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 A4 (NEOWISE) rise and set times
Comet C/2021 A4 (NEOWISE) is currently not visible from Greenwich, United Kingdom [change]
The rise and set times are defined as the time at which the upper limb of Comet C/2021 A4 (NEOWISE) 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 C/2021 A4 (NEOWISE) Orbital Elements
|Perihelion distance||q||1.14547639 AU
|Date of perihelion transit||Tp||2021-Mar-20 00:53:23
|Next perihelion transit||2301-May-28 13:29
|Argument of perihelion||peri||204.66556616438°|
|Longitude of the ascending node||node||307.08476248258°|
Visualization of Comet C/2021 A4 (NEOWISE) Orbit
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2021 A4 (NEOWISE) with respect of the Sun and the orbits of the major planets. The position of Comet C/2021 A4 (NEOWISE) 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 A4 (NEOWISE) 15 Days Ephemeris
The following table lists the ephemerides of Comet C/2021 A4 (NEOWISE) 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 A4 (NEOWISE) in our Online Planetarium at the chosen date.
|2022 Jun 19||22h 52m 45s||-38° 40’ 06”||38.16||Grus|
|2022 Jun 20||22h 52m 12s||-38° 45’ 20”||38.17||Grus|
|2022 Jun 21||22h 51m 37s||-38° 50’ 35”||38.19||Grus|
|2022 Jun 22||22h 51m 01s||-38° 55’ 51”||38.21||Grus|
|2022 Jun 23||22h 50m 23s||-39° 01’ 09”||38.23||Grus|
|2022 Jun 24||22h 49m 45s||-39° 06’ 29”||38.25||Grus|
|2022 Jun 25||22h 49m 06s||-39° 11’ 49”||38.26||Grus|
|2022 Jun 26||22h 48m 27s||-39° 17’ 12”||38.28||Grus|
|2022 Jun 27||22h 47m 45s||-39° 22’ 33”||38.30||Grus|
|2022 Jun 28||22h 47m 03s||-39° 27’ 56”||38.32||Grus|
|2022 Jun 29||22h 46m 19s||-39° 33’ 19”||38.34||Grus|
|2022 Jun 30||22h 45m 36s||-39° 38’ 42”||38.35||Grus|
|2022 Jul 01||22h 44m 50s||-39° 44’ 03”||38.37||Grus|
|2022 Jul 02||22h 44m 04s||-39° 49’ 26”||38.39||Grus|