Can you visit Warren Rupp Observatory? Yes
Richland Astronomical Society public nights and events at Warren Rupp Observatory (see wro.org and Night Sky Network).
A public night at an observatory usually starts at dusk with a short talk, then a line at the eyepiece of the main telescope for the Moon, a planet or a bright cluster, with volunteers' smaller telescopes set up outside. Dress for the night air even in summer: domes are not heated, so the telescope stays at outside temperature. Many nights sell out or cancel for clouds, so check the observatory's site on the day.

What Warren Rupp Observatory observes
Richland Astronomical Society
How dark the sky is at Warren Rupp Observatory
Warren Rupp Observatory has no Bortle rating in the list yet. The scale below shows what each class looks like.
Sky brightness and class come from the World Atlas of Artificial Night Sky Brightness (Falchi et al. 2016, CC BY-NC 4.0), with natural skyglow added, at the coordinates below. Research telescopes are often sited on mountains above the haze, so the real sky can be darker than the map suggests.
Warren Rupp Observatory among the observatories of Ohio
Green dots are observatories open to the public, blue dots research or private sites, squares dark sky places; select one for its page. See Ohio observatories for the full list.
The coordinates on this page point to zip 44901 (approximate): 40.851°N, 82.511°W.
Map data © OpenStreetMap contributors. Open the larger map · Directions. Mountain observatory roads are often gated after dark; go only on a scheduled public night.
Dark sky places, observatories and clubs near Warren Rupp Observatory
Nearest dark sky places
| Place | Where | Bortle | Distance |
|---|---|---|---|
| Cuyahoga Valley National Park | Ohio | 5 | 92 km (57 mi) |
| Fry Family Park County Park | Ohio | 5 | 101 km (63 mi) |
| Point Pelee National Park | Leamington, Canada | 4 | 126 km (78 mi) |
| Jesse Owens State Park | Ohio | 3 | 144 km (89 mi) |
| Observatory Park Park District Park | Ohio | 4 | 145 km (90 mi) |
| Burr Oak State Park | Ohio | 4 | 152 km (95 mi) |
Other observatories open to the public within 150 km
- Wilderness Center ObservatoryWilmot, Ohio, 77 km (48 mi). Star Watch nights with TWC Astronomy Club at the Wilderness Center (check events calendar)
- Perkins ObservatoryDelaware, Ohio, 78 km (48 mi). Friday Evening Programs 8-10 pm, $10 by phone (740-363-1257), talk plus telescope viewing
- Burrell Memorial ObservatoryBerea, Ohio, 79 km (49 mi). Burrell Observatory Lecture Series with observatory open house, monthly during the academic year; free
- Swasey ObservatoryGranville, Ohio, 86 km (53 mi). Physics and Astronomy department open houses during the academic year (historic 9-inch refractor plus modern scopes)
- Ritter ObservatoryToledo, Ohio, 126 km (78 mi). First Friday monthly the public planetarium program (7:30 pm, 8:30 pm May-Sep; $8 adults) observes with the Ritter 1m, weather permitting
- Ritter Planetarium and Brooks ObservatoryToledo, Ohio, 129 km (80 mi). Friday evening planetarium shows ($8 adults) followed by telescope viewing at Brooks Observatory atop McMaster Hall, weather permitting
Astronomy clubs within 150 km
- Richland Astronomical SocietyBellville, Ohio, 26 km (16 mi). Meets Monthly meetings at Ontario library or Warren Rupp Observatory
- Black River Astronomical SocietyLorain, Ohio, 57 km (35 mi). Meets 1st Wednesday monthly, 7 pm
- Wilderness Center Astronomy ClubWilmot, Ohio, 77 km (48 mi). Meets Monthly, last Friday
- Cuyahoga Astronomical AssocNorth Olmsted, Ohio, 80 km (50 mi). Meets 2nd Monday monthly, 7:30-9 pm
- Columbus Astronomical SocietyColumbus, Ohio, 81 km (50 mi). Meets 2nd Saturday monthly, 8 pm
Star parties near Warren Rupp Observatory
| Star party | Near | Distance | Usual timing |
|---|---|---|---|
| Almost Heaven Star Party | Riverton, West Virginia | 349 km (217 mi) | New-moon weekend in August |
| Green Bank Star Quest | Green Bank, West Virginia | 354 km (220 mi) | Summer |
| Starfest | Ayton, Ontario | 379 km (236 mi) | August new moon |
| Great Lakes Star Gaze | Gladwin, Michigan | 384 km (239 mi) | September new moon |
Planning a trip? Astrotourism in Ohio puts the dark sky places, observatories, clubs, star parties, planetariums and science centers of the state on one map, with the best night out worked out.
Warren Rupp Observatory record
Every value in the observatories dataset for Warren Rupp Observatory
| ID | 229 |
|---|---|
| Name | Warren Rupp Observatory |
| Address | Hidden Hollow |
| City | Mansfield |
| State | OH |
| Zip | 44901 |
| Country | USA |
| Web | https://wro.org |
| Public | y |
| Notes | Richland Astronomical Society |
| Lat | 40.85080 |
| Lon | -82.51140 |
| LatLonSpot | zip 44901 (approximate) |
| Status | Active |
| PublicNote | Richland Astronomical Society public nights and events at Warren Rupp Observatory (see wro.org and Night Sky Network) |
| Sources | https://wro.org/; https://wro.org/wp-content/uploads/2026/09/M111-Newsletter-September-2026.pdf |
From the site's observatories dataset (observatories_q426). Distances are computed from the coordinates.