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🌎  Greenwich, United Kingdom [change]

Comet P/2021 N1 (ZTF)

Comet P/2021 N1 (ZTF) is currently in the constellation of Cancer. The current Right Ascension of Comet P/2021 N1 (ZTF) is 08h 42m 44s and the Declination is +19° 08’ 19” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current estimated magnitude of Comet P/2021 N1 (ZTF) is 34.13 (JPL).

Summary of key facts about Comet P/2021 N1 (ZTF) [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]:

08h 42m 44s
+19° 08’ 19”
  • P/2021 N1 (ZTF) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the West direction at an altitude of 29° above the horizon.
  • Given its current magnitude, P/2021 N1 (ZTF) is visible only through long exposure photography.
  • See also P/2021 N1 (ZTF) rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Comet P/2021 N1 (ZTF) available on TheSkyLive:

Available Resources

Comet P/2021 N1 (ZTF) Position and Finder Charts

Below we provide Comet P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF) in Cancer on September, 28 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Comet P/2021 N1 (ZTF) in Cancer on September, 28 2022
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 P/2021 N1 (ZTF) is right now. Click on the image to see a more detailed fullscreen tracker view.

P/2021 N1 (ZTF)
RA: 08h 42m 44s
Dec: +19° 08’ 19”
Deep sky finder chart for Comet P/2021 N1 (ZTF)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet P/2021 N1 (ZTF)?, a page that provides all the information needed to find Comet P/2021 N1 (ZTF) in the sky and additional links to sky charts.

Comet P/2021 N1 (ZTF) Distance from Earth

The distance of Comet P/2021 N1 (ZTF) from Earth is currently 682,576,829 kilometers, equivalent to 4.562744 Astronomical Units. Light takes 37 minutes and 56.8312 seconds to travel from Comet P/2021 N1 (ZTF) and arrive to us.

37 minutes and 56.8312 seconds

The following chart shows the distance of Comet P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet P/2021 N1 (ZTF) to Earth

Between January 2013 and December 2100, the closest approach of Comet P/2021 N1 (ZTF) to Earth happens on Fri Sep 1 2073 at a distance of 0.128905 Astronomical Units, or 19,283,902 kilometers:

Fri Sep 1 2073

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

Comet P/2021 N1 (ZTF) brightness

The current visual magnitude of Comet P/2021 N1 (ZTF) is 34.13.


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 P/2021 N1 (ZTF), 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 P/2021 N1 (ZTF) between January 2013 and December 2100

Comet P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 70.8°
Max altitude: 57.7°
Azimuth: 289.1°

The rise and set times are defined as the time at which the upper limb of Comet P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF) Orbital Elements

The following table lists the orbital elements of Comet P/2021 N1 (ZTF) at epoch 06 July 2021 00:00 UTC (JD: 2459402.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.67681145
Orbit inclination i 11.50603445°
Perihelion distance q 0.96221069 AU
143,944,671 km
Aphelion distance Q 4.99227428 AU
746,833,604 km
Semi-major axis a 2.97724249 AU
445,389,137 km
Orbital period period 5.1372 years
1,876.3754 days
Date of perihelion transit Tp 2021-Jun-06 13:17:42
2,459,372.0540 JD
Next perihelion transit 2026-Jul-26 22:18
2,461,248.4294 JD
Argument of perihelion peri 21.190879885799°
Longitude of the ascending node node 301.1642447598°
Mean anomaly M 5.841353724476°
Mean motion n 0.19185926°/day

Visualization of Comet P/2021 N1 (ZTF) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet P/2021 N1 (ZTF) with respect of the Sun and the orbits of the major planets. The position of Comet P/2021 N1 (ZTF) 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 P/2021 N1 (ZTF)
View Comet P/2021 N1 (ZTF) in the 3D Solar System Simulator

Comet P/2021 N1 (ZTF) 15 Days Ephemeris

The following table lists the ephemerides of Comet P/2021 N1 (ZTF) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet P/2021 N1 (ZTF) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2022 Sep 21 08h 37m 23s +19° 33’ 17” 34.09 Cancer
2022 Sep 22 08h 38m 07s +19° 29’ 54” 34.10 Cancer
2022 Sep 23 08h 38m 51s +19° 26’ 32” 34.10 Cancer
2022 Sep 24 08h 39m 34s +19° 23’ 12” 34.11 Cancer
2022 Sep 25 08h 40m 18s +19° 19’ 53” 34.11 Cancer
2022 Sep 26 08h 40m 59s +19° 16’ 35” 34.12 Cancer
2022 Sep 27 08h 41m 42s +19° 13’ 18” 34.12 Cancer
2022 Sep 28 08h 42m 23s +19° 10’ 03” 34.13 Cancer
2022 Sep 29 08h 43m 02s +19° 06’ 50” 34.13 Cancer
2022 Sep 30 08h 43m 42s +19° 03’ 38” 34.14 Cancer
2022 Oct 01 08h 44m 22s +19° 00’ 28” 34.14 Cancer
2022 Oct 02 08h 45m 01s +18° 57’ 20” 34.14 Cancer
2022 Oct 03 08h 45m 38s +18° 54’ 14” 34.15 Cancer
2022 Oct 04 08h 46m 17s +18° 51’ 08” 34.15 Cancer