Subject: OSIRIS-REx Earth Flyby Update
From: Daniel Adamo <[email-masked]>
To: ATIG <[email-masked]>
Date: Wed, 20 Sep 2017 22:27:50 -0700

ATIG Members-

The attached geocentric trajectory plot for September 22's OSIRIS-REx Earth
gravity assist targeting near-Earth asteroid (101955) Bennu (1999 RQ36)
serves as an update to the ATIG_082 upload made 2016 September 12 (CST) and
archived at http://www.aiaahouston.org/adamo_astrodynamics/.  The Earth
flyby plot in last September's upload has a prelaunch planning pedigree and
has been refined in the attachment to reflect the as-flown trajectory posted
to JPL's Horizons server on 2017 September 15.

In the attached plot, note how OSIRIS-REx approach to Earth on September 22
closely parallels the ecliptic plane before the flyby directs spacecraft
motion into Bennu's orbit plane inclined 6.0 degrees to the ecliptic.
Arrival at Bennu remains scheduled for October 2018.

-Dan