The Celestial Clockworks
The Celestial Clockworks AST 101
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This 1 page Class Notes was uploaded by Thomas Konopelski on Saturday September 19, 2015. The Class Notes belongs to AST 101 at Michigan State University taught by Staff in Fall. Since its upload, it has received 21 views. For similar materials see /class/207492/ast-101-michigan-state-university in Astronomy at Michigan State University.
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Date Created: 09/19/15
AST101 Longitude Exercise For full credit for your answers be sure to include proper units as well a E W am pm where appropriate 1 The star Regulus RA10h Dec12 transited three hours ago What is the Local Sidereal Time LST 13h RA on meridian is 3 hours later that Regulus RA 2 Using the diagram at right what is the Local Sidereal Time sidereal time at the local position 9h VE 0h RA increases ccw G Greenwich 3 Using the diagram what is the Greenwich Sidereal Time VE vernal equinox GST O sun mean 16h 3 t s ar L local position you 4 Using the diagram what is the Right Ascension of the star 19h 5 Using the diagram what is the Local Mean Solar Time LMT Remember to use am or pm 3 pm Sun is 3 hours past noon position 6 Using the diagram what is the Greenwich Mean Solar Time GMT 2 10 pm 7 From the diagram what is your longitude local positionP Be sure to indicate East or West 105 W L is 7h west cw of Greenwich 8 Four hours later than the time represented on the diagram what is the Right Ascension ofthe star 19h Remember RA of object does not change with time 9 Four hours later than the diagram what is the GST 20h 4h later than question 3 10 From the diagram what is the approximate date June 21 RA of sun is 6h on summer solstice
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