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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:04 
Transit: 13:06 
Sunset: 21:07
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Near Earth Objects (NEO) » 

Near Earth Object 2021 RO16

Above the horizon.  Rise: 1:01 | Tran: 8:29 | Set: 15:59
Alt: 50.98°   Az: 142.83°   Direction: 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 a accurate data, due to the high speeds of these objects. We plan to refine our algorithms and improve accuracy in the future. To get precise data in these situations, it is recommended to use the JPL Horizons system.

Near Earth Object 2021 RO16 is in the constellation of Aries, at a distance of 108,594,454.0 kilometers from Earth. The current Right Ascension is 03h 10m 32s and the Declination is +17° 11’ 16” (apparent coordinates). The magnitude of Near Earth Object 2021 RO16 is 28.30.

Finder Charts

The sky charts below show, at different resolutions, the position of Near Earth Object 2021 RO16 in the sky. Click on each chart to access the interactive star map tool.

Star map showing the position of Near Earth Object 2021 RO16 in the constellation of Aries on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of Near Earth Object 2021 RO16 in the constellation of Aries on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

Equatorial Coordinates

Apparent

03h 10m 32s
+17° 11’ 16”
22h 26m 08s
01h 36m 40s

J2000

03h 09m 06s
+17° 05’ 29”

Additional Information

Aries
28.30

Rise and Set Times

The following table lists today's rise, transit and set times of Near Earth Object 2021 RO16 from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 72.7°
Max altitude: 55.7°
Azimuth: 287.3°

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Distance from Earth

The distance of Near Earth Object 2021 RO16 from Earth is currently 108,594,454.0 kilometers, equivalent to 0.7259090888 Astronomical Units. Light takes 6m 2.232s to travel from Near Earth Object 2021 RO16 and arrive to us.

108,594,454.0
0.7259090888
6m 2.232s

The following graph shows the distance of Near Earth Object 2021 RO16 from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.

Chart of the distance of Near Earth Object 2021 RO16 from Earth in Astronomical Units (au)
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).

Closest Approach to Earth

During the next 10 years, the closest approach of Near Earth Object 2021 RO16 to Earth will happen on Saturday 22 April 2034 at a distance of 0.004919 Astronomical Units, or 735,940 kilometers:

Saturday 22 April 2034
735,940
0.004919

Light Curve

The following chart shows the light curve of Near Earth Object 2021 RO16, i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.

Chart of the magnitude of Near Earth Object 2021 RO16 as a function of time

Orbital Elements

The following table lists the orbital elements of Near Earth Object 2021 RO16 at epoch March, 30 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 February 15, 2024
2,460,356.1491 JD
Next perihelion transit June 1, 2025
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

Orbit Visualization

The following chart is a 3D animated visualization of the orbit of Near Earth Object 2021 RO16 relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.

15 Days Ephemeris

The following table lists the ephemerides of Near Earth Object 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
Jul 10 2025 02h 48m 47s +15° 38’ 37” 28.25 Aries
Jul 11 2025 02h 51m 48s +15° 52’ 07” 28.26 Aries
Jul 12 2025 02h 54m 49s +16° 05’ 22” 28.26 Aries
Jul 13 2025 02h 57m 50s +16° 18’ 24” 28.27 Aries
Jul 14 2025 03h 00m 50s +16° 31’ 13” 28.28 Aries
Jul 15 2025 03h 03m 50s +16° 43’ 48” 28.28 Aries
Jul 16 2025 03h 06m 49s +16° 56’ 10” 28.29 Aries
Jul 17 2025 03h 09m 48s +17° 08’ 18” 28.30 Aries
Jul 18 2025 03h 12m 45s +17° 20’ 13” 28.30 Aries
Jul 19 2025 03h 15m 43s +17° 31’ 54” 28.31 Aries
Jul 20 2025 03h 18m 40s +17° 43’ 22” 28.32 Aries
Jul 21 2025 03h 21m 37s +17° 54’ 36” 28.32 Aries
Jul 22 2025 03h 24m 32s +18° 05’ 36” 28.33 Aries
Jul 23 2025 03h 27m 27s +18° 16’ 23” 28.34 Taurus

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