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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:43  ☀️ Transit: 13:03  🌅 Sunset: 19:24

Asteroid (NEO) 2021 PJ1

Asteroid (NEO) 2021 PJ1 is currently in the constellation of Taurus. The current Right Ascension of Asteroid (NEO) 2021 PJ1 is 03h 29m 32s and the Declination is +18° 43’ 32” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid (NEO) 2021 PJ1 is 28.09 (JPL).

03h 29m 32s
+18° 43’ 32”

Today's rise, transit and set times of Asteroid (NEO) 2021 PJ1 from Greenwich, United Kingdom [change] (all times relative to the local timezone Europe/London):

Azimuth: 71.2°
Max altitude: 57.4°
Azimuth: 289.0°
  • 2021 PJ1 is below the horizon from Greenwich, United Kingdom [change].
  • Given its current magnitude, 2021 PJ1 is visible only through long exposure photography.
  • 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.

Available Resources

Asteroid (NEO) 2021 PJ1 Position and Finder Charts

Below we provide Asteroid (NEO) 2021 PJ1 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 Asteroid (NEO) 2021 PJ1 in Taurus on March, 29 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid (NEO) 2021 PJ1 in Taurus on March, 29 2023
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]

Also check out Where is Asteroid (NEO) 2021 PJ1?, a page that provides all the information needed to find Asteroid (NEO) 2021 PJ1 in the sky and additional links to sky charts.

Asteroid (NEO) 2021 PJ1 Distance from Earth

The distance of Asteroid (NEO) 2021 PJ1 from Earth is currently 188,659,543 kilometers, equivalent to 1.261111 Astronomical Units. Light takes 10 minutes and 29.3005 seconds to travel from Asteroid (NEO) 2021 PJ1 and arrive to us.

10 minutes and 29.3005 seconds

The following chart shows the distance of Asteroid (NEO) 2021 PJ1 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.

Chart of the distance of Asteroid (NEO) 2021 PJ1 from Earth in Astronomical Units (au)

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth.

Closest Approach of Asteroid (NEO) 2021 PJ1 to Earth

During the next 10 years, the closest approach of Asteroid (NEO) 2021 PJ1 to Earth happens on Fri Aug 15 2025 at a distance of 0.011195 Astronomical Units, or 1,674,743 kilometers:

Fri Aug 15 2025

Asteroid (NEO) 2021 PJ1 Brightness

The current visual magnitude of Asteroid (NEO) 2021 PJ1 is 28.09.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2021 PJ1, 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.

Chart of the magnitude of Asteroid (NEO) 2021 PJ1 as a function of time

Asteroid (NEO) 2021 PJ1 Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 PJ1 at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.34309170
Orbit inclination i 0.37004484°
Perihelion distance q 0.79578291 AU
119,047,430 km
Aphelion distance Q 1.62702985 AU
243,400,202 km
Semi-major axis a 1.21140638 AU
181,223,816 km
Orbital period period 1.3333 years
487.0048 days
Date of perihelion transit Tp 2023-Feb-12 20:29:28
2,459,988.3538 JD
Next perihelion transit 2024-Jun-13 20:36
2,460,475.3586 JD
Argument of perihelion peri 169.55011892551°
Longitude of the ascending node node 232.72692763681°
Mean anomaly M 8.9786198257274°
Mean motion n 0.73921248°/day

Visualization of Asteroid (NEO) 2021 PJ1 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid (NEO) 2021 PJ1 with respect of the Sun and the orbits of the major planets. The position of Asteroid (NEO) 2021 PJ1 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 Asteroid (NEO) 2021 PJ1
View Asteroid (NEO) 2021 PJ1 in the 3D Solar System Simulator

Asteroid (NEO) 2021 PJ1 15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2021 PJ1 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid (NEO) 2021 PJ1 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Mar 22 02h 52m 47s +16° 20’ 14” 28.01 Aries
2023 Mar 23 02h 57m 53s +16° 41’ 53” 28.02 Aries
2023 Mar 24 03h 03m 01s +17° 03’ 01” 28.03 Aries
2023 Mar 25 03h 08m 07s +17° 23’ 36” 28.04 Aries
2023 Mar 26 03h 13m 14s +17° 43’ 38” 28.05 Aries
2023 Mar 27 03h 18m 21s +18° 03’ 08” 28.06 Aries
2023 Mar 28 03h 23m 29s +18° 22’ 04” 28.07 Aries
2023 Mar 29 03h 28m 36s +18° 40’ 24” 28.09 Taurus
2023 Mar 30 03h 33m 43s +18° 58’ 10” 28.10 Taurus
2023 Mar 31 03h 38m 52s +19° 15’ 21” 28.11 Taurus
2023 Apr 01 03h 43m 59s +19° 31’ 55” 28.12 Taurus
2023 Apr 02 03h 49m 06s +19° 47’ 53” 28.13 Taurus
2023 Apr 03 03h 54m 14s +20° 03’ 15” 28.15 Taurus
2023 Apr 04 03h 59m 21s +20° 18’ 01” 28.16 Taurus