CLASS Telescopes at 5,140 m (16,860 ft).

Research observatory · Cerro Toco, Antofagasta Region, Chile

CLASS Telescopes

CLASS Telescopes is a research observatory in Cerro Toco, Antofagasta Region, Chile.

CLASS Telescopes in brief

Open to the public
No regular public access
Elevation
5,140 m (16,860 ft)
Bortle class
Not yet rated
Observes in
Microwave
Part of
Llano de Chajnantor Observatory

Official site

Can you visit CLASS Telescopes? No regular public access

High-altitude research site, no public access.

For telescope views near CLASS Telescopes, see the observatories open to the public and astronomy clubs nearby; clubs hold free public star parties.

Telescopes at CLASS Telescopes: microwave

4 telescopes on 2 mounts.

Cosmology Large Angular Scale Surveyor

Llano de Chajnantor Observatory: 9 observatories on one site

How dark the sky is at CLASS Telescopes

CLASS Telescopes has no Bortle rating in the list yet. The scale below shows what each class looks like.

1 mag 8.0 21.99+ 2 mag 7.5 21.89+ 3 mag 7.0 21.69+ 4 mag 6.5 20.49+ 5 mag 6.0 19.50+ 6 mag 5.5 18.94+ 7 mag 5.0 18.38+ 8 mag 4.5 18.00+ 9 mag 4.0
The Bortle scale. Each panel shows the class number, the faintest star the naked eye reaches at the zenith, and the darkest-edge sky brightness reading of that class in mag/arcsec².

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.

CLASS Telescopes among the observatories of Chile

Alto Loa National Reserve Bosque Fray Jorge National Park Gabriela Mistral Dark Sky Sanctuary Mano del Desierto Río Hurtado Rolf Chini Cerro Murphy Observatory Extremely Large Telescope Llano de Chajnantor Observatory SOAR Telescope (Southern Astrophysical Research) Giant Magellan Telescope CTAO South (Cherenkov Telescope Array Observatory South) MASCARA-South BlackGEM Array MPG/ESO 2.2m Telescope Rapid Eye Mount Telescope Swiss Euler Telescope TAROT-South TRAPPIST Telescope VISTA Survey Telescope VLT Survey Telescope Next-Generation Transit Survey UCN 84 Telescope IRIS Telescope Victor M. Blanco 4m Telescope SARA South Telescope CHASE Telescope PROMPT Telescope GONG Telescope Wisconsin H-Alpha Mapper Atacama Pathfinder Experiment Atacama Submillimeter Telescope Experiment NANTEN2 Observatory University of Tokyo Atacama Observatory Huan Tran Telescope (HTT) All Sky Automated Survey HAT-South BiSON Deep Sky Chile Fred Young Submillimeter Telescope Simons Observatory ExTrA Danish 1.54m Telescope SPECULOOS-South VLT Auxiliary Telescopes Las Cumbres Observatory Global Telescope KMTNet-CTIO HATPI Cerro Tololo Inter-American Observatory ESO 3.6m Telescope Gemini South Observatory La Silla Observatory Las Campanas Observatory New Technology Telescope Paranal Observatory Very Large Telescope Vera C. Rubin Observatory SMARTS Telescopes Atacama Large Millimeter/submillimeter Array Du Pont Telescope Swope Telescope Warsaw Telescope Magellan Telescopes CLASS Telescopes Cerro Toco, Antofagasta Region, Chile CLASS Telescopes Cerro Toco, Antofagasta Region, Chile
Dark sky place Research or private observatory Observatory open to the public

Green dots are observatories open to the public, blue dots research or private sites, squares dark sky places; select one for its page. See Observatories in Chile for the full list.

The coordinates on this page point to CLASS site, Cerro Toco (Wikipedia, 2-decimal): 22.960°S, 67.790°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 CLASS Telescopes

Nearest dark sky places

PlaceWhereBortleDistance
Alto Loa National ReserveOllague, Chile1185 km (115 mi)
Mano del DesiertoAntofagasta, Chile1276 km (171 mi)

Other observatories open to the public within 150 km

CLASS Telescopes record

Every value in the observatories dataset for CLASS Telescopes
ID668
NameCLASS Telescopes
CityCerro Toco
StateAntofagasta Region
CountryChile
ContinentSouth America
Webhttps://sites.krieger.jhu.edu/class/
Publicn
Telescope4 telescopes on 2 mounts
ComplexLlano de Chajnantor Observatory
Type1microwave
Elevation5140
NotesCosmology Large Angular Scale Surveyor
Lat-22.96
Lon-67.79
LatLonSpotCLASS site, Cerro Toco (Wikipedia, 2-decimal)
StatusActive
StatusNoteObserving since 2016 in four bands
PublicNoteHigh-altitude research site, no public access
Sourceshttps://en.wikipedia.org/wiki/Cosmology_Large_Angular_Scale_Surveyor

From the site's observatories dataset (observatoriesglobal_q426). Distances are computed from the coordinates.