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Equipment Discussions >> Observatories

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Aquarist
Pooh-Bah


Reged: 08/27/12

Loc: Illinois
Bortle scale for those with observatories?
      #5524276 - 11/17/12 12:17 PM

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
Re: Bortle scale for those with observatories? new [Re: Aquarist]
      #5524587 - 11/17/12 03:46 PM

Mine is a 6 (Eastern Pa 30 miles east of Phila)

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Aquarist
Pooh-Bah


Reged: 08/27/12

Loc: Illinois
Re: Bortle scale for those with observatories? new [Re: JAT Observatory]
      #5524623 - 11/17/12 04:11 PM

Thanks! Hope I can get some more . . .

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tim53
Postmaster
*****

Reged: 12/17/04

Loc: Highland Park, CA
Re: Bortle scale for those with observatories? new [Re: Aquarist]
      #5524648 - 11/17/12 04:30 PM

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
professor emeritus


Reged: 06/19/07

Loc: Western Sierra Nevada Foothill...
Re: Bortle scale for those with observatories? new [Re: tim53]
      #5524658 - 11/17/12 04:36 PM

3

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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: Bortle scale for those with observatories? new [Re: powerstroke01]
      #5524727 - 11/17/12 05:20 PM

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
Re: Bortle scale for those with observatories? new [Re: MRNUTTY]
      #5524880 - 11/17/12 06:51 PM

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
Pooh-Bah


Reged: 08/27/12

Loc: Illinois
Re: Bortle scale for those with observatories? new [Re: Mary B]
      #5524923 - 11/17/12 07:15 PM

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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thesungazer
Sungazer
*****

Reged: 05/06/03

Loc: Maryland
Re: Bortle scale for those with observatories? new [Re: Aquarist]
      #5525006 - 11/17/12 08:04 PM

8 White at night

1 Black for solar


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Jeff in Austin
Carpal Tunnel
*****

Reged: 02/26/07

Loc: TEXAS
Re: Bortle scale for those with observatories? new [Re: thesungazer]
      #5525020 - 11/17/12 08:16 PM

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.
Re: Bortle scale for those with observatories? new [Re: Jeff in Austin]
      #5525178 - 11/17/12 09:49 PM

6 for me.

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vsteblina
sage


Reged: 11/05/07

Loc: Wenatchee, Washington
Re: Bortle scale for those with observatories? new [Re: Jeff in Austin]
      #5525189 - 11/17/12 09:56 PM

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
Re: Bortle scale for those with observatories? new [Re: Aquarist]
      #5525219 - 11/17/12 10:22 PM

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
Re: Bortle scale for those with observatories? new [Re: csa/montana]
      #5526847 - 11/18/12 09:02 PM

An easy 2. Wish my seeing was better though.

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dmdouglass
professor emeritus


Reged: 12/23/07

Loc: Tempe, AZ
Re: Bortle scale for those with observatories? new [Re: mattw]
      #5526882 - 11/18/12 09:21 PM Attachment (39 downloads)

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
Re: Bortle scale for those with observatories? new [Re: dmdouglass]
      #5527007 - 11/18/12 10:47 PM

About 5 for me

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raf1
scholastic sledgehammer
*****

Reged: 11/18/05

Loc: south Texas
Re: Bortle scale for those with observatories? new [Re: ShawnPreston]
      #5527028 - 11/18/12 10:56 PM

Quote:

About 5 for me




Ditto


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BPO
sage


Reged: 02/23/10

Loc: South Island, NZ
Re: Bortle scale for those with observatories? new [Re: raf1]
      #5527084 - 11/18/12 11:45 PM

1.

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BKBrown
Post Laureate
*****

Reged: 08/23/09

Loc: Northern Virginia, USA
Re: Bortle scale for those with observatories? new [Re: Aquarist]
      #5527266 - 11/19/12 02:03 AM

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
Re: Bortle scale for those with observatories? new [Re: BKBrown]
      #5527280 - 11/19/12 02:45 AM

Using the CSC scale and chart the Illinois observatory is 5 and the Iowa observatory is a 4.

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