SingAstro Sidewalk Astronomy: Sep 26 Tiong Bahru Park

Post by **weixing** » Thu Sep 03, 2009 4:15 pm

Hi,
I propose that the next SingAstro Sidewalk Astronomy to be held on Saturday, 26 Sep 2009, so that more people might be able to join us. Any objection??

By the way, when checking the Moon phase on that day using my star chart program, I notice that there is an interesting event on that day... an occultation by the first quarter Moon. The first quarter Moon will first occult Sagittarius Lambda (top of teapot) then follow by the globular cluster NGC 6638.

The occultation of Sagittarius Lambda by the unilluminated side of the first quarter Moon start at around 18h 42m SGT and the star will reappear on the illuminated side of the Moon at around 20h 21m SGT. We might not see the start of the occultation as the sky might still be too bright, but should not have a problem observing the star coming out of occultation.

The occultation of the globular cluster NGC 6638 by the unilluminated side of the first quarter Moon start at around 20h 52m SGT and the globular cluster will reappear on the illuminated side of the Moon at around 22h 00m SGT. Not sure whether can we see this occultation as the globular cluster is quite small and dim... at magnitude 9.2 and beside such a bright Moon doesn't look promising.

Anyway, can anyone else verified the above event... just in case my software or me make a mistake.

Thanks and have a nice day.

rlow · Post by **rlow** » Fri Sep 04, 2009 12:12 pm

Weixing, I believe it is a good idea to have it on Saturdays, as the Science Centre and most school astro-clubs hold their stargazing sessions on Friday evenings, so there is more opportunity for other people to join us on Saturdays as well.

I think the lunar occultation will be quite interesting to observe for those who have not seen a star disappear in the Moon shadow before. Those who want to watch lambda saggitari (top star of teapot) disappear should set up their scopes early, say to be ready by around 6.30pm. The globular cluster re-appearance should also be an event to look forward to.

As usual, I will bring a scope along.

Post by **zong** » Fri Sep 04, 2009 10:29 pm

Having missed the last 2 due to NUS Astro Commitments, I'm ready for this! Count me in! But don't think I'll confirm my scope into attendance, might or might not bring there.

rlow · Post by **rlow** » Sat Sep 05, 2009 10:30 am

Scope is not compulsory lah... We hope that not having a scope or not bringing one should not hinder anyone from coming. See... for eg., one of our main organisers always just bring only a DSLR.... [smilie=ahaaah.gif]

Usually there would be at least three scopes in use anyway.

yybmage · Post by **yybmage** » Sun Sep 06, 2009 4:18 pm

Missed the last one. I will be definitely becoming, no matter cloudy or not
! [smilie=wow2.gif]

vangel · Post by **vangel** » Fri Sep 25, 2009 5:55 pm

yeah me too. I thought last time was cancelled, but apparently not. SO I am coming cloudy or not. First session, no telescope. Only got my glasses

See you guys tomolo

vangel · Post by **vangel** » Fri Sep 25, 2009 5:57 pm

... but what time to bet here?

Post by **weixing** » Fri Sep 25, 2009 7:37 pm

Hi,

vangel wrote:... but what time to bet here?

Some of us will be there from around 7:30pm.

Hope to see you guys there... [smilie=cheer.gif]

Have a nice day.

fizzy123 · Post by **fizzy123** » Sat Sep 26, 2009 5:05 pm

Will be going..... To re-start/re-kindle this hobby that was lost since 2006

[smilie=cool.gif]

jumps · Post by **jumps** » Sun Sep 27, 2009 11:15 pm

How was the session? Many participants?