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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23

Asteroid (NEO) 2021 BB

Asteroid (NEO) 2021 BB is currently in the constellation of Capricornus. The current Right Ascension of Asteroid (NEO) 2021 BB is 21h 01m 58s and the Declination is -22° 46’ 15” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid (NEO) 2021 BB is 30.08 (JPL).

21h 01m 58s
-22° 46’ 15”

Today's rise, transit and set times of Asteroid (NEO) 2021 BB from Greenwich, United Kingdom [change] (all times relative to the local timezone Europe/London):

Azimuth: 112.9°
Max altitude: 15.7°
Azimuth: 247.2°
  • 2021 BB is above the horizon from Greenwich, United Kingdom [change].
  • Right now it is placed in the South-West direction at an altitude of 5° above the horizon.
  • Given its current magnitude, 2021 BB 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.

Available Resources

Asteroid (NEO) 2021 BB Position and Finder Charts

Below we provide Asteroid (NEO) 2021 BB finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Asteroid (NEO) 2021 BB in Capricornus on March, 28 2023
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid (NEO) 2021 BB in Capricornus on March, 28 2023
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

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

Asteroid (NEO) 2021 BB Distance from Earth

The distance of Asteroid (NEO) 2021 BB from Earth is currently 148,606,182 kilometers, equivalent to 0.993371 Astronomical Units. Light takes 8 minutes and 15.6969 seconds to travel from Asteroid (NEO) 2021 BB and arrive to us.

8 minutes and 15.6969 seconds

The following chart shows the distance of Asteroid (NEO) 2021 BB 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 BB 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 of Asteroid (NEO) 2021 BB to Earth

During the next 10 years, the closest approach of Asteroid (NEO) 2021 BB to Earth happens on Mon Jan 14 2030 at a distance of 0.012004 Astronomical Units, or 1,795,775 kilometers:

Mon Jan 14 2030

Asteroid (NEO) 2021 BB Brightness

The current visual magnitude of Asteroid (NEO) 2021 BB is 30.08.


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

Asteroid (NEO) 2021 BB Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2021 BB at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.11898085
Orbit inclination i 8.04582502°
Perihelion distance q 0.82129484 AU
122,863,960 km
Aphelion distance Q 1.04312512 AU
156,049,297 km
Semi-major axis a 0.93220998 AU
139,456,628 km
Orbital period period 0.9001 years
328.7525 days
Date of perihelion transit Tp 2023-Jun-14 00:39:57
2,460,109.5277 JD
Argument of perihelion peri 50.534056888178°
Longitude of the ascending node node 296.50964901347°
Mean anomaly M 240.60930610244°
Mean motion n 1.09504874°/day

Visualization of Asteroid (NEO) 2021 BB Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid (NEO) 2021 BB with respect of the Sun and the orbits of the major planets. The position of Asteroid (NEO) 2021 BB and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Asteroid (NEO) 2021 BB
View Asteroid (NEO) 2021 BB in the 3D Solar System Simulator

Asteroid (NEO) 2021 BB 15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2021 BB computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid (NEO) 2021 BB in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Mar 21 20h 27m 03s -25° 43’ 30” 30.09 Capricornus
2023 Mar 22 20h 31m 48s -25° 21’ 42” 30.09 Capricornus
2023 Mar 23 20h 36m 29s -24° 59’ 20” 30.09 Capricornus
2023 Mar 24 20h 41m 11s -24° 36’ 20” 30.09 Capricornus
2023 Mar 25 20h 45m 51s -24° 12’ 46” 30.08 Capricornus
2023 Mar 26 20h 50m 30s -23° 48’ 38” 30.08 Capricornus
2023 Mar 27 20h 55m 08s -23° 23’ 54” 30.08 Capricornus
2023 Mar 28 20h 59m 44s -22° 58’ 40” 30.08 Capricornus
2023 Mar 29 21h 04m 19s -22° 32’ 52” 30.08 Capricornus
2023 Mar 30 21h 08m 53s -22° 06’ 32” 30.07 Capricornus
2023 Mar 31 21h 13m 26s -21° 39’ 42” 30.07 Capricornus
2023 Apr 01 21h 17m 57s -21° 12’ 20” 30.07 Capricornus
2023 Apr 02 21h 22m 27s -20° 44’ 31” 30.07 Capricornus
2023 Apr 03 21h 26m 57s -20° 16’ 13” 30.07 Capricornus