The reduction of positional observations I

In general, astronomical observations of an object's position undergo a process of reduction. This procedure removes known instrumental errors and other systematic effects in order to provide data about the celestial body that is as objective as possible. Such reduced observations, independent of the observer's position, are then suitable for catalogue purposes or for comparison so that changes in the body's position with time can be derived. The raw observations may be the altitude (or zenith...

Problems Chapter

Note Take the length of the sidereal year to be 365-25 days. Assume all orbits are circular and coplanar, unless otherwise stated. 1. A planet's elongation is measured as 125 . Is it an inferior or superior planet 2. The sidereal period of Mercury is 88 days. What is its synodic period 3. What is the maximum possible elongation of Venus, given that its distance from the Sun is 0-723 AU 4. The synodic period of Jupiter is 398-9 days. What is its sidereal period 5. The heliocentric distance of...