Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:44 
Transit: 13:00 
Sunset: 21:16
warning Set your observing location to get relevant data
Search  close
Near Earth Objects » 

Asteroid (NEO) 2021 RO16

Above the horizon.  Rise: 2:16 | Tran: 8:57 | Set: 15:38
Alt: 45.79°   Az: 163.53°   Direction: South-South-East
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 RO16 is in the constellation of Pisces, at a distance of 83,558,977.0 kilometers from Earth. The current Right Ascension is 01h 24m 35s and the Declination is +08° 18’ 11” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 RO16 is 28.05.

Finder Charts

Map showing Asteroid (NEO) 2021 RO16 in Pisces on June, 13 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid (NEO) 2021 RO16 in Pisces on June, 13 2025. Field of view: 15x9 degrees. View in interactive sky chart

Also check out Where is Asteroid (NEO) 2021 RO16?, a page that provides all the information needed to find Asteroid (NEO) 2021 RO16 in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

01h 24m 35s
+08° 18’ 11”
23h 13m 53s
00h 38m 29s

J2000

01h 23m 15s
+08° 10’ 15”

Additional Information

Pisces
28.05

Rise and Set Times

Today's rise, transit and set times of Asteroid (NEO) 2021 RO16 from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 81.8°
Max altitude: 46.8°
Azimuth: 278.4°
  • 2021 RO16 is above the horizon from Greenwich, UK.
  • Right now it is placed in the South-South-East direction at an altitude of 45.79° above the horizon.
  • Given its current magnitude, 2021 RO16 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 RO16 from Earth is currently 83,558,977.0 kilometers, equivalent to 0.5585572616 Astronomical Units. Light takes 4m 38.723s to travel from Asteroid (NEO) 2021 RO16 and arrive to us.

83,558,977.0
0.5585572616
4m 38.723s

The following chart shows the distance of Asteroid (NEO) 2021 RO16 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 RO16 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 RO16 to Earth happens on Sat Apr 22 2034 at a distance of 0.004919 Astronomical Units, or 735,940 kilometers:

Sat Apr 22 2034
735,940
0.004919

Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2021 RO16, 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 RO16 as a function of time

Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 RO16 at epoch 30 March 2024 00:00 UTC (JD: 2460400.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.26387086
Orbit inclination i 0.41416703°
Perihelion distance q 0.87298393 AU
130,596,537 km
Aphelion distance Q 1.49883886 AU
224,223,102 km
Semi-major axis a 1.18591139 AU
177,409,820 km
Orbital period period 1.2915 years
471.7119 days
Date of perihelion transit Tp 2024-Feb-15 15:34:44
2,460,356.1491 JD
Next perihelion transit 2025-Jun-01 08:39
2,460,827.8610 JD
Argument of perihelion peri 219.3141357008°
Longitude of the ascending node node 60.084283658741°
Mean anomaly M 33.847597164567°
Mean motion n 0.76317777°/day
2h1>Orbit Visualization
Orbit Diagram of Asteroid (NEO) 2021 RO16
View Asteroid (NEO) 2021 RO16 in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2021 RO16 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 Jun 06 01h 00m 09s +05° 51’ 54” 27.99 Pisces
2025 Jun 07 01h 03m 33s +06° 12’ 35” 27.99 Pisces
2025 Jun 08 01h 06m 56s +06° 33’ 05” 28.00 Pisces
2025 Jun 09 01h 10m 18s +06° 53’ 21” 28.01 Pisces
2025 Jun 10 01h 13m 39s +07° 13’ 24” 28.02 Pisces
2025 Jun 11 01h 16m 58s +07° 33’ 16” 28.03 Pisces
2025 Jun 12 01h 20m 17s +07° 52’ 56” 28.04 Pisces
2025 Jun 13 01h 23m 36s +08° 12’ 24” 28.05 Pisces
2025 Jun 14 01h 26m 54s +08° 31’ 39” 28.05 Pisces
2025 Jun 15 01h 30m 10s +08° 50’ 43” 28.06 Pisces
2025 Jun 16 01h 33m 26s +09° 09’ 33” 28.07 Pisces
2025 Jun 17 01h 36m 41s +09° 28’ 12” 28.08 Pisces
2025 Jun 18 01h 39m 55s +09° 46’ 39” 28.08 Pisces
2025 Jun 19 01h 43m 10s +10° 04’ 55” 28.09 Pisces

Additional Resources on TheSkyLive