PCS 181 Lecture Notes - Vir Chakra, Proper Motion, Minute And Second Of Arc

• School: Ryerson University
• Department: Physics
• Course: PCS 181
• Professor: Margaret Buckby

Document Summary

Use the chart per date first then follow the data line and go horizontal to find the other number. 1- days and magnitude of avg 15 days. 3- she want sit in pc and in ly. 7- rememrber the longer the period the brighter the star. Recal radial velocity (vr) is the component of the star"s velocity along our lone of sight. Tangental velocity (it cuts across your line of sight so like the prof wlaking back and forth in front of the class) Proper motoion is the stars angular displacement along the our ling of sight (mew it looks like a slopy m) Amd she will give it to me in arcseconds (the problems) Tangential velocity is component of star"s velocity tat is perpendicular to our line of sight. She can ask what it is or calculate it shell give me mew and d if she asks for ans in km /s so take ans and devide by 1000.