Calculating Absolute Magnitude of a Star - Red's Help

  • Thread starter Thread starter redbaldyhead
  • Start date Start date
  • Tags Tags
    Magnitudes Stars
AI Thread Summary
To calculate the absolute magnitude of a star with a parallax angle of 10 milliarcseconds and an apparent magnitude of V=10.2, the distance in parsecs can be determined using the formula d=1/pi. The provided formula M=v - 5logd - 5 + A can be utilized once the distance is established. The discussion highlights confusion regarding the distance being less than that of the Sun, suggesting a need for clarification on the calculations. Participants indicate that this topic may be more suitable for a homework section. Understanding these concepts is crucial for accurately determining a star's absolute magnitude.
redbaldyhead
Messages
8
Reaction score
0
Can anyone help me get my head around this one?
A star with a parallax angle of pi = 10 millisecs and has apparent magnitude of V= 10.2
How can I determine absolute magnitude:
I have the formula M=v -5logd -5 +A which can be ignored.
d=1/pi but I am always determining d which is less than that of the sun's distance!
Thanks Red
 
Astronomy news on Phys.org
10 m'' = .010" , d=\frac{1}{p''}, where d is the distance in parsecs. Solve for d. This should probably be in the homework section.
 
Last edited:

Thread 'Potential biosignature found in Mars rock'

Publication: Redox-driven mineral and organic associations in Jezero Crater, Mars Article: NASA Says Mars Rover Discovered Potential Biosignature Last Year Press conference The ~100 authors don't find a good way this could have formed without life, but also can't rule it out. Now that they have shared their findings with the larger community someone else might find an explanation - or maybe it was actually made by life.
View full post »

Thread 'Does it make sense to build new radio telescopes?'

TL;DR Summary: In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect alien signals, it will further expand the radius of the so-called silence (or rather, radio silence) of the Universe. Is there any sense in this or is blissful ignorance better? In 3 years, the Square Kilometre Array (SKA) telescope (or rather, a system of telescopes) should be put into operation. In case of failure to detect...
View full post »

Thread 'Our Beautiful Universe - Photos and Videos'

This thread is dedicated to the beauty and awesomeness of our Universe. If you feel like it, please share video clips and photos (or nice animations) of space and objects in space in this thread. Your posts, clips and photos may by all means include scientific information; that does not make it less beautiful to me (n.b. the posts must of course comply with the PF guidelines, i.e. regarding science, only mainstream science is allowed, fringe/pseudoscience is not allowed). n.b. I start this...
View full post »

Similar threads

I Are Intensity and Magnitude independent of the radius of a star?
Replies
8
Views
2K
Stargazing M - M as the distance modulus, and a question about the distance ladder
Replies
6
Views
3K
Stargazing What is the brightest red dwarf star seen from the Earth?
Replies
10
Views
3K
I Help with the color of a star cluster
Replies
1
Views
2K
I Lines of stars that we see in the sky
Replies
26
Views
5K
B Would like to explore the Henry Draper catalogue of stars
Replies
2
Views
1K
Need to derive a formula for the number of red giants
Replies
8
Views
989
Difference in power and absolute magnitude of a star
Replies
3
Views
3K
I Nuclear reactions in the Sun and other topics on stars
Replies
49
Views
5K
B Measuring distance between two stars in a binary system
Replies
10
Views
5K

Hot Threads

Recent Insights

Back
Top