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Transcript
Constellation – Sky Familiarization Objectives Learn sky navigation using the SC-1 Star Chart Locate the meridian, horizons, and zenith for a given date and time. Use the star chart to locate stars and constellations in the night sky. Nacogdoches View 32 Zenith o CE NCP 32o West North South East SCP The stars visible, at any given time, continuously changes. This a result of the Earth’s motion, rotation and revolution. North Ecliptic East Sun’s Path Celestial Equator Declination (degrees) Right Ascension (hours) South Find the position of the star Sirius East North RA = 6h 45m DEC = -17d South March 22 @ 8:00 p.m North East Zenith West Point Meridian South March 22 @ 8:00 p.m East Point March 22 @ 8:00 p.m North East Zenith West Point Meridian South March 22 @ 9:00 p.m North East Zenith West Point South Meridian West Horizon March 22 @ 10:00 p.m North East Zenith West Point South Meridian West Horizon January 10 @ 8:00 p.m East North 5 days X 4 min/day=20 min January 5 @ 8 pm January 10 @ 8 pm Sky Familiarization A Few Things to Remember The NCP is located above the north point on the horizon. The angular distance is equal to your latitude. The zenith is located an angular distance equal to your latitude from the CE, i.e., the declination of the zenith is your latitude. Any vertical line on your SC-1 (north-south) is a meridian. Approximately one half of the stars on the SC-1 are visible at any given time (12 hours of RA).