worst light pollution ever?
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worst light pollution ever?
the sky is clearly glowing a dull green-ish blue color this morning around like 6:20 to 6:30 or so
around 6:00 the sky was dark but orion nebula didnt look any different with my 4-inch telescope before or after the sky started getting lighter
naked eye I could still see 3 faint pairs of stars where orion nebula is. and a few other stars around it
even with a half moon out too. the moon makes no difference full or new moon to the light pollution.
I could still see the same amount of nebula either way. around 6:00 or 6:30 just with a brighter background sky. the stars and nebula look almost the same either way. not any fainter than before.
orion nebula is just barely visible as a faint glow with some bright stars in it. with a dark dust pillar going toward the middle. but not really any other detail. its very featureless.
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Re: worst light pollution ever?
I'm just south of Charlotte and mine
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Re: worst light pollution ever?
I live in an apartment complex kind of place. Very bright streetlights EVERYWHERE like every 100 feet. another streetlight. its like daylight almost. they hurt your eyes a lot if you look directly at the streetlights for even a split second
The trees are bright and well lit up everywhere. you can see them glowing yell/orange with the naked eye brightly.
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Re: worst light pollution ever?
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Re: worst light pollution ever?
If I recall there is maybe a couple of industries on 26, but you should be able to locate something.
Of course, there's no place like home, so I feel for you.
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Re: worst light pollution ever?
Light Pollution?? I'm sure that you face some amount ofrealflow100 wrote: ↑Thu Oct 08, 2020 10:56 am is my light pollution really bad if the orion constellation and nebula looks the same even when the sky is getting brighter in the morning?
On a good night in Tampa, from Downtown I can visually make out the 3x Belt Stars of Orion but not always Saiph (and forget about the Sword and Nebula). In springtime it is often hard to complete Leo (and Spring is our Crispest Skies).
Or if you want a REAL TREAT, visit NYC or LA or CHI. I worked / lived in each of these Megalopolises, and you usually have to work at it to count more than 30-40 stars in a nighttime sky. I missed Hale-Bopp except for one early morning that I was able to drive up into the San Gabriels.
Does this mean that you are/aren't negatively impacted ?? Of course not.
But, you can do various things to improve your results:
1) Drive out to a Darker Location - SC doesn't have a lot of DARK, but it isn't far to get to Darker...
2) Make sure that your eyes are Dark-Adapted - use a Hoodie or a Towel over your Head (per helicon). Just remember that it takes dedication (about 20 min) to get well-adapted, and only a second to lose it.
3) Set up where Objects (Trees, Side of House, Tall Vehicle, Patio Umbrella) provide blockage of the worst nearby Light Sources...
4) Drive out to a Darker Location...
5) See #4...
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Re: worst light pollution ever?
There is a lot of private land, so finding a site can be a bit hard.
My club's site is in Taxahaw, SC, but that's pretty far for the OP to travel.
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Re: worst light pollution ever?
the nearest
and by seeing orion nebula. I meant with a telescope only. its not visible with binoculars its much too faint at only 8x magnification.
its this bright EVERYWHERE for like a mile radius. even out in the field there is super bright streetlights at 2 sides of it glaring really brightly.
here is a video showing just how bad it is. my
im in orangeburg city. near columbia one of the big cities.
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Re: worst light pollution ever?
I don't recall if you need a permit though at night.
That might be an option for decent sky.
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Re: worst light pollution ever?
https://www.lightpollutionmap.info/#zoo ... FFFFFFFFFF
I don't know your particular circumstances, but I've found it helpful to observe after midnight at home, preferably an hour or two before morning astro twilight begins. There are far fewer issues with neighbors' lights being on and such.
I can also see the day coming when I might have to go to
Man... That's some icky-tasting stuff!
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Re: worst light pollution ever?
when I compare some various
its a straight 9 for sure. Cant see hardly any stars naked eye. and the sky is very desolate and void with binoculars or telescope. only the very brightest stars visible.
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Re: worst light pollution ever?
As has been indicated, getting away from that environment is the best of all fixes. Darker skies are the great equalizer and can make up for lack of
Of course not everyone has reasonable access to darker skies, but even moving one level on the
This is not always an easy hobby to pursue. Most of us do not live in areas that are gloriously dark, and thus we have to try and make adjustments that will give us the best fighting chance for success. One thing I can tell you is that once you experience truly dark skies, you will be astounded.
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Re: worst light pollution ever?
I spent a lot of time with the moon at home it's amazing the details you can resolve.
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Re: worst light pollution ever?
I have to ask, are you looking atrealflow100 wrote: ↑Thu Oct 08, 2020 4:22 pm Its not neighbors lights problems. its the city/parking lot/road streetlights being extremely bright and excessively too frequent.
when I compare some various bortle level charts to what I can see.
its a straight 9 for sure. Cant see hardly any stars naked eye. and the sky is very desolate and void with binoculars or telescope. only the very brightest stars visible.
Any attempts to correlate his scale to maps is someone's attempt to meld two different methods for assessing the sky. The maps by their nature are static in presentation using night time satellite images and applying an algorithm that attempts to predict the spread of
The
As an example, the conditions at our dark site house are typically
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"Seeing is in some respect an art, which must be learnt." (William Herschel)
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Re: worst light pollution ever?
Cheers,14. How do you convert VIIRS data to MPSAS (magnitudes per square arc second) or Bortle scale? What does W/cm2 * sr mean anyway?
W/cm2 * sr is a SI radiometry unit for radiance. Radiance is radiant flux emitted, reflected, transmitted, or received by a surface, per unit solid angle per unit projected area. It sounds complicated, right? Well, that's because it is. Things get a bit more (actually a lot more) complicated if you want to do a simple conversion to MPSAS. I'm not even going to touch the Bortle scale issue because it is a highly subjective scale. Anyway if you are still interested in a "conversion" I can try to explain the problem. Imagine you have a small light source aimed at the sky and this light source gets picked up by the VIIRS detector. The VIIRS detector is monochromatic and has its own spectral response curve. It has no idea of the spectral curve of the light source. MPSAS or more specific magnitude is a measure that is measured in a “specific wavelength or passband”. See the problem? That's one major issue. The other major issue is that light from the light source passes through the atmosphere and while doing this it scatters due to air molecules and aerosols. So you need to create a model of light propagation for the entire Earth taking into account local air conditions, earth curvature, light absorption, Earth terrain, and whatnot. You can read more about it here. If you got the skills to do this and willing to share the result I'll be glad to include it! If not be sure to check the World Atlas (WA 2015) overlay.
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Re: worst light pollution ever?
even seeing the 2 stars by the star called mirach leading to andromeda is nearly impossible unless your somehow able to achieve full dark adaptation. and block the glare from every streetlights in the nearby vicinity.
you cant even see andromeda naked eye at all. its much too faint.
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Re: worst light pollution ever?
That is indeed rough, and I am sorry that you are having to labor under such conditions. I live in a typicallyrealflow100 wrote: ↑Fri Oct 09, 2020 12:20 am Not talking about maps. just the amount of stars I see corrospond to like a bortle 8 or 9 at least
even seeing the 2 stars by the star called mirach leading to andromeda is nearly impossible unless your somehow able to achieve full dark adaptation. and block the glare from every streetlights in the nearby vicinity.
you cant even see andromeda naked eye at all. its much too faint.
Scopes: Astro Sky 17.5 f/4.5 Dob || Apertura AD12 f/5 Dob || Zhumell Z10 f/4.9 Dob ||
ES AR127 f/6.5 || ES ED80 f/6 || Apertura 6" f/5 Newtonian
Mounts: ES Twilight-II and Twilight-I
EPs: AT 82° 28mm UWA || TV Ethos 100° 21mm and 13mm || Vixen LVW 65° 22mm ||
ES 82° 18mm || Pentax XW 70° 10mm, 7mm and 5mm || barlows
Filters (2 inch): DGM NPB || Orion Ultra Block, O-III and Sky Glow || Baader HaB
Primary Field Atlases: Uranometria All-Sky Edition and Interstellarum Deep Sky Atlas
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"Astronomers, we look into the past to see our future." (me)
"Seeing is in some respect an art, which must be learnt." (William Herschel)
"What we know is a drop, what we don't know is an ocean." (Sir Isaac Newton)
"No good deed goes unpunished." (various)
“Some people without brains do an awful lot of talking, don't you think?” (Scarecrow, The Wonderful Wizard of Oz)
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Re: worst light pollution ever?
even with binoculars or telescope its very faint and hard to detect even with averted vision. its just a small faint fuzzy looking kinda star or dot. only the very central core is visible
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canon 50mm STM F1.8
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svbony goldline 66 degree 9mm and 6mm + 40mm plossl + 2x barlow.
svbony UHC 1.25 filter + astromania 1.25" O-3 filter + also an svbony H-B filter.
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Re: worst light pollution ever?
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