× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
This topic contains 2 attachments.
Home Q & A Board Discussion News Articles and Discussion
New Topic  
oemBiology oemBiology
wrote...
Posts: 1247
Rep: 22 1
5 years ago
I would like to know on how to determine the brigthness of different planets.

1) any data source to find on what the brightness intensity is for different planets?
2) What formula to determine the brightness of different planets viewing from Earth?

Does anyone have any suggestions?
Thanks in advance for any suggestions
Read 396 times
6 Replies

Related Topics

Replies
wrote...
#1
Educator
5 years ago
Planet luminosity depends on the planet's atmosphere, generally its chemical makeup.

I think the relative brightness is measured in \(\frac{mag}{\operatorname{arcsec}^2}\)

Take for example, Jupiter:

https://www.calsky.com/?Jupiterviewer=
 Attached file 
Thumbnail(s):
You must login or register to gain access to this attachment.
oemBiology Author
wrote...
#2
5 years ago
Quote from: bio_man (5 years ago)
Planet luminosity depends on the planet's atmosphere, generally its chemical makeup. I think the relative brightness is measured in \(\frac{mag}{\operatorname{arcsec}^2}\) Take for example, Jupiter: https://www.calsky.com/?Jupiterviewer=

That is what I look for and would like to know on any data source to retrieve those historical data.
Do you have any suggestions?
Thank you very much for any suggestions (^v^)
wrote...
#3
Educator
5 years ago
This number is calculated mathematically with the help of telescopes.

I found some documents that make reference to the number 5.4 mag [see attachment]. They mention Near-Infrared Coronagraphic Imager

Additional information: http://iopscience.iop.org/article/10.1086/300553/fulltext/

I'll need to research this more to give you a precise document as to when it was first document (it'll be hard), but I'll keep you posted by tomorrow
 Attached file 
(2140.46 KB)
You must login or register to gain access to this attachment.
oemBiology Author
wrote...
#4
5 years ago
I look forward to your reply
Thank you very much for any suggestions (^v^)
wrote...
#5
Educator
5 years ago
Hi again oem7110

I strongly recommend you read this article: https://en.wikipedia.org/wiki/Apparent_magnitude

The article states:

Exert
The apparent magnitude \((m)\) of an astronomical object is a number that is a measure of its brightness as seen by an observer on Earth. The magnitude scale is logarithmic. A difference of 1 in magnitude corresponds to a change in brightness by a factor of \(\sqrt[5]{100}\), or about \(2.512\). The brighter an object appears, the lower its magnitude value (i.e. inverse relation), with the brightest astronomical objects having negative apparent magnitudes: for example Sirius at \(−1.46\). The measurement of apparent magnitudes or brightnesses of celestial objects is known as photometry.

You might also be interested in Surface brightness. For that, I recommend this article: https://en.wikipedia.org/wiki/Surface_brightness

Formula

I did more searching and found this journal article from the year 1899: http://adsabs.harvard.edu/full/1899ApJ....10..225H

It discusses in detail how it's calculated (beyond my scope of knowledge)



Hopefully this helps!
oemBiology Author
wrote...
#6
5 years ago
Thank you very much for suggestions (^v^)
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  942 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 232
  
 138
  
 596
Your Opinion
Which country would you like to visit for its food?
Votes: 204
Previous poll results: What's your favorite funny biology word?