other stars

[YOEL311]

hello!
thanks for this great library
i want a similar library that calculeates the location and height of many other stars in the sky
i want to use it in java script
is there such a library?

I'm afraid I don't know of any!

To low precision, the math is straightforward, but getting good accuracy is daunting. I have access to VSOP87, but it's really overkill for our purposes. (What I really want is as few terms as I need to be accurate to an arcsecond or so within 200 years of J2000.)

I imagine there must be such estimations, but I haven't found them. If I can find a good one, I'd like to include it.

[YOEL311]

Very unfortunate
Exactly low is good too
Do they have other languages (JAVA for example)?

The webpage linked describes an algorithm but does not provide source code in any language, you'd have to write a library for it.

I think this might be what we're looking for: https://ssd.jpl.nasa.gov/?planet_pos

[YOEL311]

Great
Maybe we will write a library that does this?
I am very happy to help
Although i was not good at math

I'll be looking into it as time permits! The other stars aren't a high priority for our business, but they do look fun, so...

[YOEL311]

Very strange that they have not done suchthung to thiis day

How do you want to call the new repository , or you prefer to bulid it witihin the current repository

Another option: http://stjarnhimlen.se/comp/ppcomp.html

I think I prefer the JPL fits, but they don't include the moon.

@YOEL311 I do not yet know if it's in-scope or out-of-scope for this library. Will ponder that!

[YOEL311]

Another option: http://stjarnhimlen.se/comp/ppcomp.html

I think I prefer the JPL fits, but they don't include the moon.

Yes, but we already have the moon

Well, yes, but to a much lower accuracy than the rest of the data. Since the earth's position depends on the moon's, this can have a significant effect upon the accuracy of the other planets (especially the ones close to the earth).

Actually, I take that back: over the distances involved, it probably doesn't matter too much.

So I spent some time over the weekend on this and I'm about halfway to a prototype that does everything the library currently does, but for all the planets. If I can manage to duplicate all of the functionality and the performance isn't substantially worse, then I'll probably just make the next major version of astro a complete rewrite.

[YOEL311]

Great!
Are there any thing I can help?
I would be very happy if you gave me easy tasks
I want to help