OSIRIS-Rex tracker
by Luca Cassioli 2018
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Official site

Image source: http://spaceflight101.com/osiris-rex/

Phase name


Start time


Launch on an EELV from Cape Canaveral on an Earth-escape trajectory

Sept. 2016

Outbound cruise

Perform deep space maneuver; Earth flyby & gravity assist; instrument calibration & checkout

Oct. 2016


Perform braking maneuvers; survey the Bennu orbital environment for natural satellites; collect the first resolved images

Aug. 2018

Preliminary survey

Estimate the mass of Bennu; refine shape and spin state models

Nov. 2018

Orbital A

Demonstrate orbital flight; transition to landmark-based optical navigation

Dec. 2018

Detailed survey

Spectrally map the entire Bennu surface; collect images and lidar data for global shape and spin state models; search for dust plumes

Jan. 2019

Orbital B

Collect lidar and radiometric data for high resolution topographic map and gravity model; observe candidate sampling sites and downselect for reconnaissance

Mar. 2019


Conduct sorties for closer look at up to 4 candidate sampling sites and select 1

May 2019

TAG rehearsal

Systematically and deliberately practice steps of sample collection sequence

Aug. 2019

Sample collection

Collect >60g (Level 2 requirement) of pristine bulk regolith and 26 cm2 of surface material, and stow it in the SRC (Sample Return Capsule)

Sept. 2019

Quiescent operations

Remain in Bennu's heliocentric orbit; monitor spacecraft health

Oct. 2019

Return Cruise

Transport the sample back to the vicinity of the Earth

Mar. 2021

Earth Return & Recovery

Get the sample safely to the ground and to the curation facility in late September 2023

Sept. 2023

Table source: https://directory.eoportal.org

Horizons parameters:
1: X, Y, Z
2: X, Y, Z, VX, VY, VZ
3: X, Y, Z, VX, VY, VZ, LT, RG, RR
4: X, Y, Z, LT, RG, RR
5: VX, VY, VZ
6: LT, RG, RR

X X-component of position vector (km)
Y Y-component of position vector (km)
Z Z-component of position vector (km) VX X-component of velocity vector (km/sec)
VY Y-component of velocity vector (km/sec)
VZ Z-component of velocity vector (km/sec)
LT One-way down-leg Newtonian light-time (sec)
RG Range; distance from coordinate center (km)
RR Range-rate; radial velocity wrt coord. center (km/sec)