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Location: Tucson
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OSIRIS-REx Flyby

On September 22 2017, the interplanetary probe OSIRIS-REx will fly past the Earth. The Earth will give it a "gravity assist" and put it on a trajectory to reach the asteroid Bennu. If you know where to look and live in the right part of the world, you will have a chance to see it through binoculars or a telescope.

Click on a table row to load a finder chart corresponding to that time, or alternatively, you can go straight to a finder chart for a time near closest approach by clicking here.

Flyby data
Time of closest approachSep 22, 09:51:45
Distance of closest approach23,596 km
Speed at closest approach8.520 km/s
Speed at infinity (rel. to Earth)6.229 km/s

Position Table (click on a row of the table to load a finder chart)

Time Distance (km) Brightness Altitude Azimuth Right ascension Declination Constellation Sun altitude
Sep 22, 04:00:00145,23813.121.3°239.0°0h 2.2m-12° 23'Cetus-28.2°
Sep 22, 04:30:00134,21213.014.5°243.6°23h 59.5m-13° 27'Cetus-22.2°
Sep 22, 05:00:00123,23112.87.4°247.5°23h 56.5m-14° 42'Cetus-16.0°
Sep 22, 05:30:00112,28812.6-0.1°250.9°23h 53.1m-16° 12'Aquarius-9.7°
Sep 22, 06:00:00101,37812.4-8.0°253.8°23h 49.0m-18° 0'Aquarius-3.4°
Sep 22, 06:30:0090,50312.2-16.2°256.1°23h 44.1m-20° 15'Aquarius2.9°
Sep 22, 07:00:0079,67511.9-25.0°257.6°23h 37.8m-23° 5'Aquarius9.3°
Sep 22, 07:30:0068,92811.6-34.5°257.8°23h 29.5m-26° 49'Sculptor15.5°
Sep 22, 08:00:0058,34111.3-44.8°255.4°23h 17.5m-31° 52'Sculptor21.7°
Sep 22, 08:30:0048,09010.9-55.9°246.8°22h 57.9m-39° 2'Grus27.8°
Sep 22, 09:00:0038,57810.6-65.1°219.5°22h 19.2m-49° 27'Grus33.7°
Sep 22, 09:30:0030,74710.3-58.8°171.4°20h 32.8m-62° 50'Pavo39.3°
Sep 22, 10:00:0026,55310.3-31.3°147.9°16h 9.1m-62° 45'Triangulum Australe44.5°
Sep 22, 10:30:0028,12411.02.3°141.8°13h 47.6m-39° 56'Centaurus49.2°
Sep 22, 11:00:0034,76712.128.7°143.0°12h 58.8m-19° 37'Virgo53.1°
Sep 22, 11:30:0044,15313.546.4°149.5°12h 35.0m-6° 36'Virgo56.0°
Sep 22, 12:00:0054,81614.758.0°161.8°12h 20.8m1° 38'Virgo57.6°
Sep 22, 12:30:0066,10614.864.8°180.9°12h 11.2m7° 6'Virgo57.6°
Sep 22, 13:00:0077,74114.766.8°204.7°12h 4.3m10° 55'Virgo56.2°
Sep 22, 13:30:0089,58414.864.9°226.5°11h 59.2m13° 44'Coma Berenices53.4°
Sep 22, 14:00:00101,56614.960.5°242.4°11h 55.2m15° 51'Leo49.5°
Sep 22, 14:30:00113,64715.055.0°253.6°11h 52.1m17° 31'Leo44.9°
Sep 22, 15:00:00125,79915.248.9°261.7°11h 49.7m18° 51'Leo39.7°
Sep 22, 15:30:00138,00515.342.7°268.0°11h 47.7m19° 56'Leo34.1°
Sep 22, 16:00:00150,25015.536.4°273.2°11h 46.2m20° 50'Leo28.2°
 

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