2. An unknown star is 2.40 parsec away from the sun, calculate the a) parallax b) distance in lightyear c) distance in km d) and distance in miles
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- 31) Star Sirius has an apparent magnitude of -1.47 and an absolute magnitude of 1.41. Estimate the distance to Sirius.33) A star is observed to be having an absolute magnitude of -5.6 and is located at a distance of 159.96 pc. Estimate the apparent magnitude12 Suppose that you measure the parallax angle for a particular star to be 0.5 arcsecond. The distance to this star is A) 2 parsecs. B C 0.5 parsec. E 5 light-years. (D) 5 parsecs. 0.5 light-year.
- 6) The distance to the Hyades was traditionally measured by using: a. The standard candle method b. Main-sequence fitting c. The moving-cluster method d. Radar e. The standard ruler method6) Estimate the distance to the star with absolute magnitude -5.6 and apparent magnitude 0.751. Distance to moon is about one quarter million miles, how much is that in km? m? 2. Distance to star Proxima Centauri is about 2.4 x 1013 miles, how much is that in ly? AU? pc? 3. Distance to Sun is 93 million miles, how much is that in ly? AU? pc?