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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:44 
Transit: 13:00 
Sunset: 21:16
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Near Earth Objects » 

Asteroid (NEO) 2021 CD

Above the horizon.  Rise: 5:34 | Tran: 13:37 | Set: 21:41
Alt: 19.28°   Az: 77.91°   Direction: East-North-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 CD is in the constellation of Gemini, at a distance of 272,332,476.0 kilometers from Earth. The current Right Ascension is 06h 05m 11s and the Declination is +22° 25’ 42” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 CD is 28.81.

Finder Charts

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

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

Celestial Coordinates

Apparent

06h 05m 11s
+22° 25’ 42”
18h 12m 38s
00h 17m 49s

J2000

06h 03m 39s
+22° 25’ 52”

Additional Information

Gemini
28.81

Rise and Set Times

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

Azimuth: 67.6°
Max altitude: 61.0°
Azimuth: 292.4°
  • 2021 CD is above the horizon from Greenwich, UK.
  • Right now it is placed in the East-North-East direction at an altitude of 19.28° above the horizon.
  • Given its current magnitude, 2021 CD is visible only through long exposure photography.
  • Go to interactive sky chart

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Distance from Earth

The distance of Asteroid (NEO) 2021 CD from Earth is currently 272,332,476.0 kilometers, equivalent to 1.8204301620 Astronomical Units. Light takes 15m 8.403s to travel from Asteroid (NEO) 2021 CD and arrive to us.

272,332,476.0
1.8204301620
15m 8.403s

The following chart shows the distance of Asteroid (NEO) 2021 CD 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 CD 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 CD to Earth happens on Sat Jan 29 2028 at a distance of 0.010620 Astronomical Units, or 1,588,731 kilometers:

Sat Jan 29 2028
1,588,731
0.010620

Light Curve

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

Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 CD at epoch 16 October 2024 00:00 UTC (JD: 2460600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.42146313
Orbit inclination i 4.70978846°
Perihelion distance q 0.42808054 AU
64,039,938 km
Aphelion distance Q 1.05179245 AU
157,345,912 km
Semi-major axis a 0.73993650 AU
110,692,925 km
Orbital period period 0.6365 years
232.4824 days
Date of perihelion transit Tp 2024-Aug-30 14:44:10
2,460,553.1140 JD
Next perihelion transit 2025-Apr-20 02:18
2,460,785.5964 JD
Argument of perihelion peri 202.73289987459°
Longitude of the ascending node node 129.20343229709°
Mean anomaly M 73.377403021245°
Mean motion n 1.54850424°/day
2h1>Orbit Visualization
Orbit Diagram of Asteroid (NEO) 2021 CD
View Asteroid (NEO) 2021 CD in the 3D Solar System Simulator

15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2021 CD 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 05h 30m 32s +22° 02’ 06” 28.57 Taurus
2025 Jun 07 05h 35m 25s +22° 07’ 03” 28.60 Taurus
2025 Jun 08 05h 40m 16s +22° 11’ 27” 28.64 Taurus
2025 Jun 09 05h 45m 04s +22° 15’ 17” 28.67 Taurus
2025 Jun 10 05h 49m 49s +22° 18’ 34” 28.71 Taurus
2025 Jun 11 05h 54m 32s +22° 21’ 20” 28.74 Orion
2025 Jun 12 05h 59m 13s +22° 23’ 35” 28.77 Orion
2025 Jun 13 06h 03m 52s +22° 25’ 18” 28.80 Gemini
2025 Jun 14 06h 08m 28s +22° 26’ 33” 28.82 Gemini
2025 Jun 15 06h 13m 03s +22° 27’ 18” 28.85 Gemini
2025 Jun 16 06h 17m 35s +22° 27’ 34” 28.88 Gemini
2025 Jun 17 06h 22m 05s +22° 27’ 23” 28.90 Gemini
2025 Jun 18 06h 26m 32s +22° 26’ 45” 28.93 Gemini
2025 Jun 19 06h 30m 58s +22° 25’ 40” 28.95 Gemini

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