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Near Earth Objects » 

Asteroid (NEO) 2021 TG4

Above the horizon.  Rise: 8:50 | Tran: 15:04 | Set: 21:18
Alt: 40.99°   Az: 193.07°   Direction: South-South-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 TG4 is in the constellation of Pisces, at a distance of 420,364,101.0 kilometers from Earth. The current Right Ascension is 00h 47m 35s and the Declination is +03° 09’ 56” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 TG4 is 24.99 (data provided by JPL Horizons).

Finder Charts

Map showing Asteroid (NEO) 2021 TG4 in Pisces on February, 15 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid (NEO) 2021 TG4 in Pisces on February, 15 2025. Field of view: 15x9 degrees. View in interactive sky chart

Also check out Where is Asteroid (NEO) 2021 TG4?, a page that provides all the information needed to find Asteroid (NEO) 2021 TG4 in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

00h 47m 35s
+03° 09’ 56”
00h 39m 22s
01h 26m 57s

J2000

00h 46m 17s
+03° 01’ 43”

Additional Information

Pisces
24.99

Rise and Set Times

Today's rise, transit and set times of Asteroid (NEO) 2021 TG4 from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 86.9°
Max altitude: 41.7°
Azimuth: 273.2°
  • 2021 TG4 is above the horizon from Greenwich, UK.
  • Right now it is placed in the South-South-West direction at an altitude of 40.99° above the horizon.
  • Given its current magnitude, 2021 TG4 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.

Distance from Earth

The distance of Asteroid (NEO) 2021 TG4 from Earth is currently 420,364,101.0 kilometers, equivalent to 2.8099604562 Astronomical Units. Light takes 23m 22.184s to travel from Asteroid (NEO) 2021 TG4 and arrive to us.

420,364,101.0
2.8099604562
23m 22.184s

The following chart shows the distance of Asteroid (NEO) 2021 TG4 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 TG4 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 TG4 to Earth happens on Thu May 4 2034 at a distance of 0.007468 Astronomical Units, or 1,117,148 kilometers:

Thu May 4 2034
1,117,148
0.007468

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2021 TG4, 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 TG4 as a function of time

Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 TG4 at epoch 30 March 2024 00:00 UTC (JD: 2460400.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.58424499
Orbit inclination i 7.77763520°
Perihelion distance q 0.91538622 AU
136,939,830 km
Aphelion distance Q 3.48810233 AU
521,812,683 km
Semi-major axis a 2.20174428 AU
329,376,256 km
Orbital period period 3.2671 years
1,193.2975 days
Date of perihelion transit Tp 2024-Aug-08 23:45:29
2,460,531.4899 JD
Next perihelion transit 2027-Nov-15 06:53
2,461,724.7875 JD
Argument of perihelion peri 216.50638760969°
Longitude of the ascending node node 46.944645577933°
Mean anomaly M 320.48229985868°
Mean motion n 0.30168503°/day

Orbit Visualization

Orbit Diagram of Asteroid (NEO) 2021 TG4
View Asteroid (NEO) 2021 TG4 in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2021 TG4 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 Feb 08 00h 34m 33s +01° 31’ 27” 24.89 Cetus
2025 Feb 09 00h 36m 16s +01° 44’ 33” 24.90 Cetus
2025 Feb 10 00h 37m 58s +01° 57’ 34” 24.92 Cetus
2025 Feb 11 00h 39m 41s +02° 10’ 31” 24.93 Cetus
2025 Feb 12 00h 41m 23s +02° 23’ 25” 24.94 Cetus
2025 Feb 13 00h 43m 05s +02° 36’ 13” 24.95 Cetus
2025 Feb 14 00h 44m 47s +02° 48’ 58” 24.97 Cetus
2025 Feb 15 00h 46m 28s +03° 01’ 40” 24.98 Pisces
2025 Feb 16 00h 48m 10s +03° 14’ 17” 24.99 Pisces
2025 Feb 17 00h 49m 51s +03° 26’ 49” 25.00 Pisces
2025 Feb 18 00h 51m 32s +03° 39’ 18” 25.01 Pisces
2025 Feb 19 00h 53m 13s +03° 51’ 44” 25.02 Pisces
2025 Feb 20 00h 54m 53s +04° 04’ 05” 25.03 Pisces
2025 Feb 21 00h 56m 33s +04° 16’ 22” 25.04 Pisces

Additional Resources