Optimal Right Ascension Values for Star Viewing at Different Latitudes

  • Thread starter Thread starter Jimbob999
  • Start date Start date
  • Tags Tags
    Right ascension
AI Thread Summary
For optimal star viewing on September 21st at a latitude of -32 degrees, the best right ascension values are between 7 hours and 17 hours, as the Sun will block the view from 0 to 6 hours and 18 to 24 hours. Conversely, at a latitude of 45 degrees, the ideal viewing times are from 0 to 5 hours and 19 to 24 hours due to similar solar obstruction. The discussion raises questions about how latitude affects these values and whether the inquiry fits the appropriate forum category. Participants seek clarification on the relationship between latitude and right ascension for precise star viewing. Overall, understanding these factors is crucial for effective stargazing at different locations.
Jimbob999
Messages
26
Reaction score
2

Homework Statement


What range of values of right ascension would be best for viewing stars at a latitude of -32 degrees, 20 arcmins, 10 arcseconds on September 21st? What about an observer at 45deg22arcm11arcs?

Homework Equations


N/A

The Attempt at a Solution



On these dates the Sun would be approximately at 0 hours of right ascension in southern hemisphere as it is the vernal equinox. Because of this, between 0hrs and 6hrs of right ascension will be blocked by the sun as well as 18 to 24 hours. Thus between 7 hours of right ascension and 17 hours would be best for viewing the stars at this date. For northern hemisphere, 6-18hrs are blocked by the sun, therefore 0-5hr and 19-24hr are best for viewing.

I am not sure if I am on the right track here or not and how to get more precise based on the degree of latitude?
 
Physics news on Phys.org
Hmm is this in the wrong subforum perhaps?
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

B History of RA [why is the vernal equinox used?]
Replies
5
Views
2K
Values of Right Ascension which are best for an observer
Replies
1
Views
5K
How Can You Determine the Right Ascension of a Star with a Meridian Circle?
Replies
3
Views
3K
I How to deal with the celestial meridian?
Replies
1
Views
1K
Connection between right ascension and time
Replies
3
Views
6K
Ow high above the horizon the sun would be on the vernal equinox
Replies
2
Views
3K
What time of year observations of crab pulsar were made
Replies
3
Views
3K
How Is a Sidereal Day Measured Using Stellar Observations?
Replies
1
Views
4K

Hot Threads

Recent Insights

Back
Top