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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:07 
Transit: 12:56 
Sunset: 20:45
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Near Earth Objects » 

Asteroid (NEO) 2021 PJ1

Below the horizon.  Rise: 1:19 | Tran: 5:29 | Set: 9:40
Alt: -53.12°   Az: 319.89°   Direction: North-West
Please note: this information pertains to a Near-Earth Object (NEO). During close approaches, our current computational model is not able to provide an accurate position, due to the high speeds of these objects. We plan to refine our algorithms to improve accuracy in the future. JPL Horizons can compute precise positions in these situations.

Asteroid (NEO) 2021 PJ1 is in the constellation of Sagittarius, at a distance of 104,121,580.0 kilometers from Earth. The current Right Ascension is 20h 06m 52s and the Declination is -19° 52’ 26” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 PJ1 is 27.42 (data provided by JPL Horizons).

Finder Charts

Map showing Asteroid (NEO) 2021 PJ1 in Sagittarius on May, 16 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid (NEO) 2021 PJ1 in Sagittarius on May, 16 2025. Field of view: 15x9 degrees. View in interactive sky chart

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.

Celestial Coordinates

Apparent

20h 06m 52s
-19° 52’ 26”
10h 22m 53s
06h 29m 45s

J2000

20h 05m 23s
-19° 56’ 52”

Additional Information

Sagittarius
27.42

Rise and Set Times

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

Azimuth: 109.9°
Max altitude: 18.6°
Azimuth: 250.1°

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.

Distance from Earth

The distance of Asteroid (NEO) 2021 PJ1 from Earth is currently 104,121,580.0 kilometers, equivalent to 0.6960097728 Astronomical Units. Light takes 5m 47.312s to travel from Asteroid (NEO) 2021 PJ1 and arrive to us.

104,121,580.0
0.6960097728
5m 47.312s

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

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
1,674,743
0.011195

Light Curve

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

Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 PJ1 at epoch 12 September 2023 00:00 UTC (JD: 2460200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.34302773
Orbit inclination i 0.37017713°
Perihelion distance q 0.79579250 AU
119,048,864 km
Aphelion distance Q 1.62681355 AU
243,367,844 km
Semi-major axis a 1.21130303 AU
181,208,354 km
Orbital period period 1.3332 years
486.9424 days
Date of perihelion transit Tp 2023-Feb-12 20:41:31
2,459,988.3622 JD
Next perihelion transit 2024-Jun-13 19:18
2,460,475.3046 JD
Argument of perihelion peri 169.59360194595°
Longitude of the ascending node node 232.68900564947°
Mean anomaly M 156.83500019468°
Mean motion n 0.73930709°/day
2h1>Orbit Visualization
Orbit Diagram of Asteroid (NEO) 2021 PJ1
View Asteroid (NEO) 2021 PJ1 in the 3D Solar System Simulator

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. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 May 09 19h 55m 01s -20° 30’ 54” 27.71 Sagittarius
2025 May 10 19h 56m 36s -20° 25’ 57” 27.67 Sagittarius
2025 May 11 19h 58m 12s -20° 20’ 59” 27.64 Sagittarius
2025 May 12 19h 59m 46s -20° 15’ 58” 27.60 Sagittarius
2025 May 13 20h 01m 20s -20° 10’ 55” 27.56 Sagittarius
2025 May 14 20h 02m 53s -20° 05’ 52” 27.52 Sagittarius
2025 May 15 20h 04m 25s -20° 00’ 46” 27.48 Sagittarius
2025 May 16 20h 05m 56s -19° 55’ 38” 27.44 Sagittarius
2025 May 17 20h 07m 26s -19° 50’ 28” 27.40 Sagittarius
2025 May 18 20h 08m 55s -19° 45’ 19” 27.35 Capricornus
2025 May 19 20h 10m 24s -19° 40’ 07” 27.31 Capricornus
2025 May 20 20h 11m 50s -19° 34’ 53” 27.27 Capricornus
2025 May 21 20h 13m 16s -19° 29’ 40” 27.22 Capricornus
2025 May 22 20h 14m 42s -19° 24’ 25” 27.18 Capricornus

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