SQM rating for Wiruna?

Matty (Matt Fowler) · #1 16-06-2013, 01:08 PM

Hi guys an friend from Germany recently asked me for the SQM rating for Wiruna after he saw some nightscapes that I took at SPSP. I checked the ASNSW web site but it dosnt seem to have the info. Was wondering if anyone had the info or could direct me to a resource that might contain it.
Thanks in advance
Matty

GTB_an_Owl (Geoff) · #2 16-06-2013, 01:36 PM

Hi Matt

21.5 comes to mind
but do a thread search because it has been discussed here before

geoff

Matty (Matt Fowler) · #3 16-06-2013, 01:51 PM

Quote:

Originally Posted by GTB_an_Owl

Hi Matt

21.5 comes to mind
but do a thread search because it has been discussed here before

geoff

Thanks Geoff I checked it out and somewhere in the range of 21.4 to 21.7 seems to be the consensus.
cheers
Matty

White Rabbit · #4 17-06-2013, 08:16 AM

What's an SQM rating? I googled it but it only comes up with company stock ratings.

Cheers.

BPO · #5 17-06-2013, 08:20 AM

Quote:

Originally Posted by White Rabbit

What's an SQM rating?

Unihedron's Sky Squality Meter.

AstralTraveller (David) · #6 17-06-2013, 10:18 AM

Quote:

Originally Posted by BPO

Unihedron's Sky Squality Meter.

Does this quantify how squalid your sky is?? Mine's probably about 80% squalid but I expect Wiruna is about 5%.

BPO · #7 17-06-2013, 11:00 AM

Quote:

Originally Posted by AstralTraveller

Does this quantify how squalid your sky is?? Mine's probably about 80% squalid but I expect Wiruna is about 5%.

Heh! I wondered what the hell you were on about, but then I reread my message.

Unihedron's Sky Quality Meter.

AstralTraveller (David) · #8 17-06-2013, 11:25 AM

Quote:

Originally Posted by BPO

Heh! I wondered what the hell you were on about, but then I reread my message.

Unihedron's Sky Quality Meter.

WARNING: Incurable pedant on the loose.

rogerco (Roger) · #9 17-06-2013, 01:00 PM

Found the reference to the meter but what is the range of readings, where does twenty something fit in?

BPO · #10 17-06-2013, 06:12 PM

Quote:

Originally Posted by rogerco

Found the reference to the meter but what is the range of readings, where does twenty something fit in?

S&T's Tony Flanders wrote an article about Surface Brightness.

An excerpt:

Quote:

17.0 poor urban skies
18.0 good urban skies, poor suburban skies
19.0 fairly good suburban skies
20.0 very good suburban skies
21.0 typical rural skies
22.0 ideal dark-sky site