A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?
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- A star has an apparent magnitude of 10 and an absolute magnitude of 2.5. How far is it?
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- A star with a trigonometric parallax of .02 arcseconds has a distance of O2.0 light years. 50 pc. 4 kpc. 20 pc. O need more information (magnitudes)Question A1 Use a diagram to explain what is meant by the parallax angle, p, for a star observed twice from Earth, with a 6-month interval between each observation. Hence define the parsec, and calculate its value in astronomical units and metres. The star Betelgeuse is observed to have a parallax angle p = 4.5 x 10-³ arcseconds. State the distance of Betelgeuse in units of parsecs and light years.If a star has an apparent magnitude equal to its absolute magnitude, how far away is it in parsecs? In light-years?
- Star 1 and star 2 have the same V-magnitude, V = 7.5. However, they have different B-magnitudes, B1 = 7.2 and B2 = 8.5. What are the (B − V) colors of the two stars?The a star system contains two stars, one with apparent magnitude m = 10.5 and the other with m = 10.9. What is the combined apparent magnitude of the two stars?6) Estimate the distance to the star with absolute magnitude -5.6 and apparent magnitude 0.75