Navigation system, aerospace vehicle and optical marker

An aerospace vehicle comprising:

• a lighting device that irradiates an optical marker which is attached to a target object in space and reflects light with light of a predetermined wavelength band;
• and
• an image acquisition device that acquires an image of the optical marker which has reflected the light of the predetermined wavelength band,
• wherein the image which has been acquired by the image acquisition device is processed and whereby an attitude of the target object can be estimated, and
• wherein the light of the predetermined wavelength band is absorbed by a heat insulation film which forms a surface of the target object.

An optical marker which is attached to a target object in space before the target object is launched into space,

• wherein:
• the optical marker reflects light of a predetermined wavelength band which has been radiated from a lighting device of an aerospace vehicle;
• an image of the optical marker which has reflected the light of the predetermined wavelength band is acquired by an image acquisition device of the aerospace vehicle;
• and the image is processed by an image processing device and whereby an attitude of the target object can be estimated, and
• wherein the light of the predetermined wavelength band is absorbed by a heat insulation film which forms a surface of the target object.