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🌎 Location: Greenwich, United Kingdom [change]

Asteroid (NEO) 2017 SA20

Asteroid (NEO) 2017 SA20 is a Near Earth Object. If you've heard news about a potential impact of this asteroid with the Earth, please check out Will Asteroid Asteroid (NEO) 2017 SA20 Impact Earth?.

Asteroid (NEO) 2017 SA20 is currently in the constellation of Capricornus. The current Right Ascension of Asteroid (NEO) 2017 SA20 is 20h 47m 13s and the Declination is -17° 58’ 18” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid (NEO) 2017 SA20 is 29.68 (JPL).

Summary of key facts about Asteroid (NEO) 2017 SA20 [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

20h 47m 13s
-17° 58’ 18”
  • 2017 SA20 is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South direction at an altitude of 20° above the horizon.
  • Given its current magnitude, 2017 SA20 is visible only through long exposure photography.
  • See also 2017 SA20 rise and set times.
  • 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.

Additional information about Asteroid (NEO) 2017 SA20 available on TheSkyLive:

Available Resources

Asteroid (NEO) 2017 SA20 Position and Finder Charts

Below we provide Asteroid (NEO) 2017 SA20 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) 2017 SA20 in Capricornus on January, 26 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid (NEO) 2017 SA20 in Capricornus on January, 26 2021
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) 2017 SA20?, a page that provides all the information needed to find Asteroid (NEO) 2017 SA20 in the sky and additional links to sky charts.

Asteroid (NEO) 2017 SA20 Distance from Earth

The distance of Asteroid (NEO) 2017 SA20 from Earth is currently 282,537,912 kilometers, equivalent to 1.888649 Astronomical Units. Light takes 15 minutes and 42.4450 seconds to travel from Asteroid (NEO) 2017 SA20 and arrive to us.

15 minutes and 42.4450 seconds

The following chart shows the distance of Asteroid (NEO) 2017 SA20 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.

Distance of Asteroid (NEO) 2017 SA20 from Earth between January 2013 and December 2100

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) 2017 SA20 to Earth

During the next 10 years, the closest approach of Asteroid (NEO) 2017 SA20 to Earth happens on Fri Apr 19 2024 at a distance of 0.009788 Astronomical Units, or 1,464,200 kilometers:

Fri Apr 19 2024

Asteroid (NEO) 2017 SA20 brightness

The current visual magnitude of Asteroid (NEO) 2017 SA20 is 29.68.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid (NEO) 2017 SA20, 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.

Predicted magnitude of Asteroid (NEO) 2017 SA20 between January 2013 and December 2100

Asteroid (NEO) 2017 SA20 rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Asteroid (NEO) 2017 SA20 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 108.0°
Max altitude: 20.5°
Azimuth: 252.1°

The rise and set times are defined as the time at which the upper limb of Asteroid (NEO) 2017 SA20 touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid (NEO) 2017 SA20 Orbital Elements

The following table lists the orbital elements of Asteroid (NEO) 2017 SA20 at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.19191087
Orbit inclination i 0.12885143°
Perihelion distance q 0.88892247 AU
132,980,909 km
Aphelion distance Q 1.31113798 AU
196,143,450 km
Semi-major axis a 1.10003022 AU
164,562,179 km
Orbital period period 1.1500 years
421.4105 days
Date of perihelion transit Tp 2019-Nov-09 14:53:20
2,458,797.1204 JD
Next perihelion transit 2021-Jan-04 00:44
2,459,218.5309 JD
Argument of perihelion peri 248.95093707436°
Longitude of the ascending node node 34.986706577716°
Mean anomaly M 173.74191099738°
Mean motion n 0.85427392°/day

Visualization of Asteroid (NEO) 2017 SA20 Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid (NEO) 2017 SA20 with respect of the Sun and the orbits of the major planets. The position of Asteroid (NEO) 2017 SA20 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) 2017 SA20
View Asteroid (NEO) 2017 SA20 in the 3D Solar System Simulator

Asteroid (NEO) 2017 SA20 15 Days Ephemeris

The following table lists the ephemerides of Asteroid (NEO) 2017 SA20 computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid (NEO) 2017 SA20 in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Jan 19 20h 12m 15s -20° 01’ 48” 29.59 Capricornus
2021 Jan 20 20h 16m 56s -19° 46’ 48” 29.60 Capricornus
2021 Jan 21 20h 21m 38s -19° 31’ 21” 29.61 Capricornus
2021 Jan 22 20h 26m 18s -19° 15’ 29” 29.62 Capricornus
2021 Jan 23 20h 30m 56s -18° 59’ 11” 29.64 Capricornus
2021 Jan 24 20h 35m 35s -18° 42’ 29” 29.65 Capricornus
2021 Jan 25 20h 40m 10s -18° 25’ 23” 29.66 Capricornus
2021 Jan 26 20h 44m 44s -18° 07’ 54” 29.67 Capricornus
2021 Jan 27 20h 49m 18s -17° 50’ 03” 29.69 Capricornus
2021 Jan 28 20h 53m 49s -17° 31’ 49” 29.70 Capricornus
2021 Jan 29 20h 58m 21s -17° 13’ 14” 29.71 Capricornus
2021 Jan 30 21h 02m 49s -16° 54’ 20” 29.72 Capricornus
2021 Jan 31 21h 07m 18s -16° 35’ 06” 29.73 Capricornus
2021 Feb 01 21h 11m 44s -16° 15’ 32” 29.75 Capricornus