Harrisburg.
The definitive guide to dark skies and celestial observation in Harrisburg, IL. Verified using National Park Service and NASA Night Sky Network Clubs data.
Quick Guide for Harrisburg
- Top Community Pick: Neckers Astronomy Observation Deck (~36.7 miles)
- Best Scientific Reading: Bortle 6.0 at Log Cabins
- Local Experts: Astronomical Association of Southern Illinois
- Verified Observations: 5 distinct spots
Stargazing in Harrisburg is surprisingly rewarding if you know exactly where to set up your tripod. While enthusiasts often gather at Neckers Astronomy Observation Deck for its accessibility, scientific audits conducted by the National Park Service at Log Cabins provide the most accurate reading of the regional sky quality, measuring at a Bortle 6.0. The local landscape of Harrisburg offers several pockets of darkness that are perfect for deep-sky observation.
The Best Times for Stargazing in Harrisburg
Since Harrisburg sits in a transitional light zone, viewing is best during the New Moon or after midnight when some commercial lighting is reduced.
Expert Tips for Harrisburg Observers
Before heading out to Neckers Astronomy Observation Deck, we recommend arriving during civil twilight to scout the terrain safely. For the best views this location, try to observe targets when they are highest in the sky to minimize atmospheric interference. Local enthusiasts often frequent this spot, making it a great place to meet experienced observers. Regardless of your gear, allow 30 minutes for your eyes to fully dark-adapt.
Illinois Guide
Local Top Spots
Community-vetted locations known for clear horizons and accessibility for telescopes and astrophotography.
Neckers Astronomy Observation Deck
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
Wahnsiedler Observatory
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
SIU Carbondale Neckers Lawn
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
SIU Carbondale University Farms Astronomy Observation Area - parking at campus lot #63
" Astronomy & Science Activities Learn about the Sun, our night sky, telescopes, astrophotography and current NASA sponsored research at SIU. Special Activity: Voyage to the Moon Walk from Earth to the Moon! "
Giant City State Park
" Standard Advice: Dress in layers as temperatures drop quickly after sunset. Use a red-light flashlight to preserve your night vision. "
NPS Sky Measurements
Instrumented readings from the National Park Service Night Sky Program, providing the most accurate SQM and Bortle classifications.
Log Cabins
Fort Donelson NB
"SQM of 20.47 at 2035 local time. Only fair transparency and seeing. Some fast moving clouds. High humidity. Milky Way visible from 20 degrees above north horizon. Great rift visible, Saggitarius cloud not easily visible, Scutum cloud not visible. Milky Way about 10-12 degrees wide, but faint and no fine details. To the NW a blue white light dome easily seen. Due East is the Clarksville lightdome almost 25 degrees high and 15 degrees wide. Core is bright. Adjacent to the light dome is a spotlight (which we determined was coming from the cemetary here in FODO park). To the West and Southwest is another lightdome fainter than Clarksville, but brighter than the Milky Way"
Houchin's Field
Mammoth Cave NP
"A very calm, humid and clear night. Dewfall occurred during data collection, however dew heater prevented lens fog. Multiple light domes evident from site, as well as a continuous glow along horizon in all directions. Airglow was present. Andromeda galaxy easily visible, Beehive (Pegasus) visible with medium effort. Prominent dust lanes in Milky Way visible at zenith, but not below ~50 degrees. Limiting magnitude found in Pegasus."
International Dark Sky Parks
Premier locations certified for their exceptional dark sky quality and commitment to light pollution mitigation.
Stacy Park
Stacy Park is a 35-acre park located in Olivette, Missouri and is approximately 10 miles west of St. Louis City. Established in 1926, Stacy Park is one of five…
Mammoth Cave National Park
Named for the enormity of its “mammoth” subterranean vaults and the unparalleled extent of its passages, Mammoth Cave National Park is the longest known cave…
Local Astronomy Clubs
Connect with experts and fellow enthusiasts through local astronomical societies and community groups.