[AZ-Observing] Re: KPNO sky brightness
- From: "Steve Coe" <dmarc-noreply@xxxxxxxxxxxxx> (Redacted sender "stevecoeaz2001" for DMARC)
- To: "az-observing@xxxxxxxxxxxxx" <az-observing@xxxxxxxxxxxxx>
- Date: Thu, 11 Feb 2016 19:59:04 +0000 (UTC)
Tom;
Thanks for the info, I now have a better idea of what the numbers are telling
us. I am fascinated the such a small change in the value makes a big
difference in how dark the sky seems to an observer. I do remember that the
presence or absence of the Milky Way changes the value that the meter provides.
Thanks;Steve Coe
On Thursday, February 11, 2016 7:57 AM, Tom Polakis <tpolakis@xxxxxxx>
wrote:
---- Steve Coe <dmarc-noreply@xxxxxxxxxxxxx> wrote:
Howdy Brian, et al;
I need a reminder of the value for the numbers given, please. Is "21.75"
what you would call "true dark" skies? What is that number? Does someone
have some values for the SAC sites?
Steve,
I think I remember numbers on the order of 21.6 to 21.7 mag./square arcsecond
for Fredericksen's Meadow, and 21.5 or so for the Hovatter Rd. site. There
can be considerable scatter in the measurements, though. North central
Nevada/Eastern Oregon probably approaches 22.0, which is as dark as it gets on
the planet, I'm told.
Tom
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.
Other related posts:
