Aquarist
sage
Reged: 08/27/12
Loc: Illinois
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Bortle scale for those with observatories?
#5524276 - 11/17/12 12:17 PM
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Just a quick survey of the Bortle scale for those folks with observatories. Response would be greatly appreciated. Thanks in advance.
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JAT Observatory
NOT a Wimp
Reged: 02/20/05
Loc: In the Primordial Soup
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Re: Bortle scale for those with observatories?
[Re: Aquarist]
#5524587 - 11/17/12 03:46 PM
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Mine is a 6 (Eastern Pa 30 miles east of Phila)
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Aquarist
sage
Reged: 08/27/12
Loc: Illinois
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Re: Bortle scale for those with observatories?
[Re: JAT Observatory]
#5524623 - 11/17/12 04:11 PM
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Thanks! Hope I can get some more . . .
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tim53
Postmaster
Reged: 12/17/04
Loc: Highland Park, CA
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Re: Bortle scale for those with observatories?
[Re: Aquarist]
#5524648 - 11/17/12 04:30 PM
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I had to look the scale up. I live 7 miles north of downtown LA, and I'm on a hilltop. I was surprised to realize that, based on the cutoffs in the scale, I must be between 7 and 8. I can't see the Milky Way, but I can easily find m31 when it's more than about 45 degrees up. I once took an image of the Crab when it was near the zenith, and got 15th mag stars in 5 minutes with my c 9.25"
Tim
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powerstroke01
sage
Reged: 06/19/07
Loc: Western Sierra Nevada Foothill...
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Re: Bortle scale for those with observatories?
[Re: tim53]
#5524658 - 11/17/12 04:36 PM
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3
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MRNUTTY
Carpal Tunnel
Reged: 11/22/11
Loc: Mendon, MA
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Re: Bortle scale for those with observatories?
[Re: powerstroke01]
#5524727 - 11/17/12 05:20 PM
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I am currently building mine at home, in a yellow area. Luckily my parents' house is in a blue/grey area on the eastern shoreline. There is a platform on the roof rooftop (widows walk) big enough for a modest sized scope and box of EP's.
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Mary B
Vendor - Echo Astronomy and Electronics
Reged: 05/21/10
Loc: Minnesota
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Re: Bortle scale for those with observatories?
[Re: MRNUTTY]
#5524880 - 11/17/12 06:51 PM
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Between a 2 and 3 depending on the streetlight in front of my house. It is going bad and goes off a lot. I haven't complained 
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Aquarist
sage
Reged: 08/27/12
Loc: Illinois
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Re: Bortle scale for those with observatories?
[Re: Mary B]
#5524923 - 11/17/12 07:15 PM
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Quote:
Between a 2 and 3 depending on the streetlight in front of my house. It is going bad and goes off a lot. I haven't complained
I am jealous! Perhaps the streetlight needs an assist?
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gpiepol
Sungazer
Reged: 05/06/03
Loc: Rising Sun Observatory
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Re: Bortle scale for those with observatories?
[Re: Aquarist]
#5525006 - 11/17/12 08:04 PM
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8 White at night
1 Black for solar 
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Jeff in Austin
Pooh-Bah
Reged: 02/26/07
Loc: TEXAS
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Re: Bortle scale for those with observatories?
[Re: gpiepol]
#5525020 - 11/17/12 08:16 PM
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8 on the Bortle scale for me, although It doesn't seem as bad as it could be.
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Tim Gilliland
professor emeritus
Reged: 03/28/09
Loc: Sand Springs Okla.
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Re: Bortle scale for those with observatories?
[Re: Jeff in Austin]
#5525178 - 11/17/12 09:49 PM
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6 for me.
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vsteblina
sage
Reged: 11/05/07
Loc: Wenatchee, Washington
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Re: Bortle scale for those with observatories?
[Re: Jeff in Austin]
#5525189 - 11/17/12 09:56 PM
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FIVE at my house.
30 minutes away at my vacation home it is typically a two. However, when low elevation fog covers eastern Washington it becomes magical.
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csa/montana
Den Mama
Reged: 05/14/05
Loc: montana
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Re: Bortle scale for those with observatories?
[Re: Aquarist]
#5525219 - 11/17/12 10:22 PM
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I haven't converted mine to the Bortle scale, I use the SQM; and average 21.5.
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mattw
sage
Reged: 07/19/06
Loc: Arkansas
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Re: Bortle scale for those with observatories?
[Re: csa/montana]
#5526847 - 11/18/12 09:02 PM
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An easy 2. Wish my seeing was better though.
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dmdouglass
professor emeritus
Reged: 12/23/07
Loc: Tempe, AZ
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Re: Bortle scale for those with observatories?
[Re: mattw]
#5526882 - 11/18/12 09:21 PM Attachment (38 downloads)
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Hi Carol...
Here is a reference I use, which is from the CSC web pages.
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ShawnPreston
super member
Reged: 10/07/08
Loc: Ontario
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Re: Bortle scale for those with observatories?
[Re: dmdouglass]
#5527007 - 11/18/12 10:47 PM
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About 5 for me
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raf1
sage
Reged: 11/18/05
Loc: central Texas
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Re: Bortle scale for those with observatories?
[Re: ShawnPreston]
#5527028 - 11/18/12 10:56 PM
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Quote:
About 5 for me
Ditto
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BPO
sage
Reged: 02/23/10
Loc: South Island, NZ
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Re: Bortle scale for those with observatories?
[Re: raf1]
#5527084 - 11/18/12 11:45 PM
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1.
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BKBrown
Carpal Tunnel
Reged: 08/23/09
Loc: Northern Virginia, USA
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Re: Bortle scale for those with observatories?
[Re: Aquarist]
#5527266 - 11/19/12 02:03 AM
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About 7.5, I can see stars to about 4.3ish at zenith on average and sometimes a bit better after midnight when local lighting levels throttle back...
Clear Skies,
Brian
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Starman27
Post Laureate
Reged: 01/29/06
Loc: Illinois, Iowa
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Re: Bortle scale for those with observatories?
[Re: BKBrown]
#5527280 - 11/19/12 02:45 AM
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Using the CSC scale and chart the Illinois observatory is 5 and the Iowa observatory is a 4.
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