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Near Earth Objects » 

Asteroid (NEO) 2021 CD

Below the horizon.  Rise: 3:42 | Tran: 8:03 | Set: 12:25
Alt: -56.42°   Az: 11.66°   Direction: North-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 Sagittarius, at a distance of 110,874,003.0 kilometers from Earth. The current Right Ascension is 17h 49m 25s and the Declination is -18° 19’ 43” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 CD is 28.91 (data provided by JPL Horizons).

Finder Charts

Map showing Asteroid (NEO) 2021 CD in Sagittarius on February, 15 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid (NEO) 2021 CD in Sagittarius on February, 15 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

17h 49m 25s
-18° 19’ 43”
12h 27m 03s
06h 16m 28s

J2000

17h 47m 56s
-18° 19’ 18”

Additional Information

Sagittarius
28.91

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: 108.3°
Max altitude: 20.2°
Azimuth: 251.7°

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 CD from Earth is currently 110,874,003.0 kilometers, equivalent to 0.7411469326 Astronomical Units. Light takes 6m 9.836s to travel from Asteroid (NEO) 2021 CD and arrive to us.

110,874,003.0
0.7411469326
6m 9.836s

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

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 Feb 08 17h 03m 10s -17° 57’ 23” 28.96 Ophiuchus
2025 Feb 09 17h 08m 49s -18° 02’ 15” 28.95 Ophiuchus
2025 Feb 10 17h 14m 32s -18° 06’ 35” 28.95 Ophiuchus
2025 Feb 11 17h 20m 19s -18° 10’ 20” 28.94 Ophiuchus
2025 Feb 12 17h 26m 10s -18° 13’ 31” 28.93 Ophiuchus
2025 Feb 13 17h 32m 06s -18° 16’ 04” 28.93 Ophiuchus
2025 Feb 14 17h 38m 06s -18° 17’ 58” 28.92 Ophiuchus
2025 Feb 15 17h 44m 10s -18° 19’ 12” 28.92 Ophiuchus
2025 Feb 16 17h 50m 18s -18° 19’ 45” 28.91 Sagittarius
2025 Feb 17 17h 56m 31s -18° 19’ 35” 28.91 Sagittarius
2025 Feb 18 18h 02m 47s -18° 18’ 41” 28.90 Sagittarius
2025 Feb 19 18h 09m 07s -18° 17’ 02” 28.90 Sagittarius
2025 Feb 20 18h 15m 31s -18° 14’ 37” 28.90 Sagittarius
2025 Feb 21 18h 21m 59s -18° 11’ 22” 28.89 Sagittarius

Additional Resources