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public LocationGreenwich, UK
Sunrise: 5:10 
Transit: 13:06 
Sunset: 21:02
sunny   (Daytime)   What's Visible Now?
Near Earth Objects » 

Asteroid (NEO) 2021 CD

Above the horizon.  Rise: 8:47 | Tran: 15:44 | Set: 22:40
Alt: 16.12°   Az: 267.86°   Direction: 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 CD is in the constellation of Leo, at a distance of 167,196,157.0 kilometers from Earth. The current Right Ascension is 10h 44m 24s and the Declination is +11° 14’ 34” (apparent coordinates). The magnitude of Asteroid (NEO) 2021 CD is 28.98 (data provided by JPL Horizons).

Finder chart of 2021 CD in Leo on July,21 2024
Map showing Asteroid (NEO) 2021 CD in Leo on July, 21 2024. Field of view: 50x30 degrees
View interactive star map

Celestial Coordinates


10h 44m 24s
+11° 14’ 34”
05h 12m 42s
15h 57m 06s


10h 43m 06s
+11° 22’ 19”

Additional Information


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: 78.6°
Max altitude: 49.8°
Azimuth: 281.2°
  • 2021 CD is above the horizon from Greenwich, UK.
  • Right now it is placed in the West direction at an altitude of 16.12° above the horizon.
  • Given its current magnitude, 2021 CD 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.

Finder Charts

Finder chart of 2021 CD
Sky map showing Asteroid (NEO) 2021 CD in Leo on July, 21 2024. Field of view: 10x6 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.

Distance from Earth

The distance of Asteroid (NEO) 2021 CD from Earth is currently 167,196,157.0 kilometers, equivalent to 1.1176372780 Astronomical Units. Light takes 9m 17.706s to travel from Asteroid (NEO) 2021 CD and arrive to us.

9m 17.706s

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

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 12 September 2023 00:00 UTC (JD: 2460200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.42148847
Orbit inclination i 4.70982077°
Perihelion distance q 0.42804543 AU
64,034,685 km
Aphelion distance Q 1.05177098 AU
157,342,700 km
Semi-major axis a 0.73990821 AU
110,688,693 km
Orbital period period 0.6365 years
232.4691 days
Date of perihelion transit Tp 2023-May-23 16:03:32
2,460,088.1691 JD
Next perihelion transit 2024-Jan-11 03:19
2,460,320.6382 JD
Argument of perihelion peri 202.73464564091°
Longitude of the ascending node node 129.20647587438°
Mean anomaly M 173.9548039031°
Mean motion n 1.54859305°/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
2024 Jul 14 10h 22m 42s +13° 24’ 08” 29.15 Leo
2024 Jul 15 10h 25m 31s +13° 07’ 59” 29.13 Leo
2024 Jul 16 10h 28m 20s +12° 51’ 41” 29.11 Leo
2024 Jul 17 10h 31m 07s +12° 35’ 17” 29.09 Leo
2024 Jul 18 10h 33m 54s +12° 18’ 46” 29.07 Leo
2024 Jul 19 10h 36m 40s +12° 02’ 08” 29.05 Leo
2024 Jul 20 10h 39m 25s +11° 45’ 25” 29.02 Leo
2024 Jul 21 10h 42m 09s +11° 28’ 36” 29.00 Leo
2024 Jul 22 10h 44m 51s +11° 11’ 42” 28.98 Leo
2024 Jul 23 10h 47m 33s +10° 54’ 44” 28.96 Leo
2024 Jul 24 10h 50m 12s +10° 37’ 43” 28.93 Leo
2024 Jul 25 10h 52m 49s +10° 20’ 39” 28.91 Leo
2024 Jul 26 10h 55m 25s +10° 03’ 32” 28.89 Leo
2024 Jul 27 10h 57m 59s +09° 46’ 25” 28.87 Leo

Additional Resources