Planisphere

fizzy123 · Post by **fizzy123** » Sun Nov 28, 2004 11:19 pm

Hmmm...... I noticed tat most planisphere programs do not cater for equatorial region, they only have 30 degree north and above, but why? :idea: :roll: Is there any particular reason for tis?

Can a 30 degree planisphere be used for Singapore. :idea:

Post by **weixing** » Sun Nov 28, 2004 11:51 pm

Hmmm...... I noticed tat most planisphere programs do not cater for equatorial region, they only have 30 degree north and above, but why? Is there any particular reason for tis?

One simple reason: Small market. Most country that are very active in Astronomy, such as US, UK, Japan, China & etc, did not locate near equator.

Can a 30 degree planisphere be used for Singapore.

Should be able to use, but it is very difficult to use and some part of the sky is not shown and you need to manually offset the constellation position.

Have a nice day.

Post by **VinSnr** » Mon Nov 29, 2004 12:28 am

fizzy123 wrote:Hmmm...... I noticed tat most planisphere programs do not cater for equatorial region, they only have 30 degree north and above, but why? :idea: :roll: Is there any particular reason for tis? Can a 30 degree planisphere be used for Singapore. :idea:

Like what weixing said..small market. The lowest planisphere I have seen is 20 degrees.

Use software la....

chrisyeo · Post by **chrisyeo** » Mon Nov 29, 2004 3:10 am

Actually, planispheres for equatorial regions are available. You just have to work hard to find them. I believe that Perseid telescope were selling a really excellent set during Singastrofest 2005. I also have one got off the net.

Cheers,
Chris

Post by **Airconvent** » Mon Nov 29, 2004 9:12 am

mm...i thought Albert from the Science Centre has instructions to make one in one of his books?

rich

fizzy123 · Post by **fizzy123** » Mon Nov 29, 2004 9:26 am

Those published by the Science center is really too basic and do not show bright DSO on it.

hlyf · Post by **hlyf** » Mon Nov 29, 2004 9:35 am

Physical space sells local planispheres.. www.tpspace.com

Post by **Airconvent** » Mon Nov 29, 2004 11:06 am

Thanks for the link, hlyf.
I didn't even know Wee Kiong had a website!....
Perhaps he should add it to his signature? And yes, I do recall him selling some planispheres in the past now that you mentioned it.

rich

Post by **weixing** » Mon Nov 29, 2004 7:21 pm

Hi,

Those published by the Science center is really too basic and do not show bright DSO on it.

Most planispheres don't have DSO on it. Can you imagine what will happen to Virgo/Coma Berenices/Leo constellation if you just put the M objects in that region in the planispheres??? You can't see anything else... Ha Ha Ha

mm...i thought Albert from the Science Centre has instructions to make one in one of his books?

I saw his prototype planispheres for singapore use... quite nice. Just wonder when will it be ready???

Have a nice day.

hlyf · Post by **hlyf** » Mon Nov 29, 2004 9:51 pm

hmm physical space's one has a couple of dsos... some labeled like M42 and M45 others just dotted circles e.g. around scorpius/ sagittarius region.. but i think it's just a rough guide, tell u where the constellations are, dsos need to use a more detailed chart..

SingAstro

Planisphere

Planisphere

Re: Planisphere