1. Suppose you are sailing in the Pacific on July 7 and observe
Vega (RA = 18h35m, dec. = +39°) at the zenith. Your GMT clock reads
8:55 am. a) What is Vega’s HA? b) What is the local sidereal time?
c) What is the RA of the Sun? d) What is the HA of the Sun? e) What
is the local solar time? f) What is your longitude? g) What is your
latitude? h) Look at a map; where are you?
2.Suppose you am observing from the Cerro Tololo Interamerican
Observatory in Chile (CTIO; lat. 30°S, long. 71°W) on May 28. At
9:50 p.m. EST you observe a bright star crossing the meridian 59°
above the southern horizon. a) What is the star’s declination? b)
What is the GMT? c) What is your local solar time (not the time
zone time)? d) What is the RA of the Sun? e) What is the local
sidereal time? f) What is the star’s RA? g) Check a star map; what
star is it?
3. If you observe a star to have a maximum altitude of 84° above
the southern horizon and a minimum altitude that is 6° above the
northern horizon, a) what is your latitude? b) what is the star’s
declination?

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