I have been looking at this problem for a while and i am really getting frustrated. This is for science olympiad... it isnt graded, but i want to learn how to do it.(adsbygoogle = window.adsbygoogle || []).push({});

Here it is. I have an eclipsing binary system with a period of 1 year. Star Q has 800 solar luminosities, while the other star, star R, has 5 solar luminosities.

the radius of star R is 1,000,000 km, and it is .75 solar masses. Its apparent magnitude is 11.6.

It does not say whether or not the stars are main sequence.

a) what is the apparent magnitude of star R?

b) what is the seperation of the two stars in km

c) what is the distance to the star system in parsecs.

d) what is the absolute magniude of star R.

the answer for the above questions are as follows:

a) 5.8-6.3

b) 7-8x 10^9 km

c) 470-530 parsecs

d) 2.8-3.4

i have the answers but i dont know how to get to them and i have been trying for over an hour and a half. please help someone!!!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Having trouble with eclipsing binaries.

**Physics Forums | Science Articles, Homework Help, Discussion**