Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with coordinate
Search options answers only
not deleted
user 2153
Questions on systems to uniquely determine position of a point or other geometric element on a manifold such as Euclidean space.
2
votes
Accepted
rotate right ascension, declination based on delta time
The conversion between local and equatorial coordinates is
$$\sin\text{Az}=-\frac{\sin\text{HA}\cos\delta}{\cos\text{El}},\quad \sin\text{El}=\sin\delta\sin\phi+\cos\delta\cos\phi\cos\text{HA}$$
with …
- 37.4k
2
votes
What does the coordinate of time really mean?
The coordinate time $\Delta t_{AB}$ is the difference in time measured by the clock at $B$ and the clock at $A$, so that $\Delta t_{AB}=t_B-t_A$. … This means that coordinate time is frame-dependent - it depends on the reference frame you're in.
Proper time is sometimes called "wristwatch time". …
- 37.4k
7
votes
Accepted
Conventional units for astronomical object coordinates
Right ascension is usually given in hours, minutes and seconds, but declination is usually given in degrees, arcminutes (') and arcseconds ("), with one arcminute being 1/60th of a degree and one arcs …
- 37.4k
4
votes
What's the Right Ascension & Declination of Galactic Left & Galactic Right?
The galactic coordinate system is a version of spherical coordinates centered on Earth and defined so that - very roughly:
A latitude of $b=0^{\circ}$ corresponds to all points in the Galactic plane … You can convert this to right ascension and declination using the explicit formulas by hand, but I prefer this coordinate transform calculator. …
- 37.4k