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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. 32 o. NCP. SCP. Zenith. Nacogdoches View. CE.
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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.
32o NCP SCP Zenith Nacogdoches View CE 32o West North South Horizon East
The stars visible, at any given time, continuously changes. This a result of the Earth’s motion, rotation and revolution.
Ecliptic Sun’s Path Celestial Equator Declination (degrees) Right Ascension (hours) North East South
Find the position of the star Sirius North East RA = 6h 45m DEC = -17d South
March 22 @ 8:00 p.m North Zenith East West Point South Meridian
March 22 @ 8:00 p.m East Point
March 22 @ 8:00 p.m North Zenith East West Point South Meridian
March 22 @ 9:00 p.m North Zenith East West Point South Meridian West Horizon
March 22 @ 10:00 p.m North Zenith East West Point South Meridian West Horizon
January 5 @ 8 pm January 10 @ 8 pm January 10 @ 8:00 p.m North East 5 days X 4 min/day=20 min
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).