Orbit Determination of Hayabusa during Close Proximity Phase

The Actual Dynamical Environment About Itokawa

The dynamical environment about and on Asteroid 25143 Itokawa is studied using the shape and rotation state model estimated during the close proximity phase of the Hayabusa mission to that asteroid. We first discuss the general gravitational properties of the shape model assuming a constant density. Next we discuss the actual dynamical environment about this body, both on the surface and in orb...

Autonomous Control of Multiple Spacecraft during Close Proximity Operations

Close proximity shotgunblast injuries of the chest.

Enabling Multiple QR Codes in Close Proximity

Quick response codes – 2D patterns that can be scanned to access online resources – are being used in a variety of industrial and consumer applications. However, it is problematic to use multiple QR codes in close proximity: scans can fail or result in access to the wrong resource. While this problem is, strictly speaking, due to the design of the scanning software, the very large number of ext...

Close Proximity Operations for Implementing Mitigation Strategies

Central to almost any characterization or mitigation mission to a small solar system body, such as an asteroid or comet, is a phase of close proximity operations on or about about that body for some length of time. This is an extremely challenging environment in which to operate a spacecraft, surface vehicle, or human mission. Reasons for this include the a priori uncertainty of the physical ch...