Download Worksheet 4.1 Coordinates and Star Maps

Introduction to Astronomy
SCI 135-B1
Name: Nicole Shetka
Date: February13, 2010
Worksheet 4.1: Coordinates and Star Maps
Use “SFA Star Chart 2 – Equatorial Region” (second page of the .pdf file) as needed to
answer the following questions. You may discuss any questions you have in the
appropriate discussion section.
1. In the equatorial coordinate system, which term is equivalent to longitude?
Right Ascension is the equivalent to longitude.
2. Find the brightest star on the map.
a. What is its common name?
Sirius
b. What is its abbreviated name (Greek letter and constellation
abbreviation)? Alpha CMa
c. What is its RA and Dec? RA: 6hr 45min Dec: -16 degrees
3. If Earth’s axis were tilted by 33.5º rather than the actual 23.5º, what would be the
declination of the …
a. Vernal Equinox? 20 degrees
b. Winter Solstice? -32 degrees
4. What bright star is located near 9h30min and -10º?
Alpha Hya
5. What is another name for  Ori?
Another name for that star is Betelgeuse.
6. On a given day, the coordinates of Jupiter are (1:58, +10º25’).
a. What constellation is Jupiter in? Jupiter is in the constellation Pisces
with those coordinates.
b. Name a nearby bright star. A nearby bright star would be Hamal in the
Aries constellation.
Source for Star Map: http://www.midnightkite.com/starcharts.html