What Palomar Observatory does

Palomar Observatory is a non-profit astronomical research facility located atop Palomar Mountain in north San Diego County, California, owned and operated by the California Institute of Technology (Caltech) as part of its Division of Physics, Mathematics and Astronomy. The facility hosts multiple specialized optical and infrared instruments, most prominently the 200-inch Hale Telescope (operational since 1949 first light), the 48-inch Samuel Oschin Schmidt Telescope housing the Zwicky Transient Facility (ZTF), and a 60-inch telescope. Since 2017, ZTF has functioned as an automated all-sky survey using machine learning to detect and classify transient phenomena including supernovae, black hole flares, and near-Earth asteroids, producing billions of observations of variable objects.

The observatory is expanding into radio astronomy through the Deep Synoptic Array (DSA), a planned 1,650-dish array scheduled for completion in 2029, alongside pathfinder instruments STARE2 and DSA-110 for fast radio burst detection. Palomar operates within Caltech's broader multi-messenger research ecosystem that includes LIGO, Keck Observatory, and IPAC data centers. Access to observing facilities is provided through Caltech's proposal allocation process serving the international academic research community, with survey data made publicly available. Funding flows from NSF, NASA/JPL, Heising-Simons Foundation, Schmidt Sciences, and Caltech institutional support. The facility reported 75+ years of continuous operation as of 2024 and appointed Mansi Kasliwal as director in December 2025.

Name

Palomar Observatory

Legal name

Palomar Observatory

Website

https://astro.caltech.edu

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

1,001–5,000 employees

Ownership category

akta.pro rank

Product category

Astronomical Observatory Services

NAICS

Space Research and Technology (92711), Geophysical Surveying and Mapping Services (54136)

SIC

Optical Instruments & Lenses (3827), Search, Detection, Navagation, Guidance, Aeronautical Sys (3812), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Space & Astronomy Programs (EDAMABAE)

Keywords

• Astronomical research facilities
• Optical telescope operations
• Transient sky surveys
• Radio astronomy arrays
• Observatory data services

Headquarters

HQ city

Pasadena

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Technology or R&D, Operations

Distribution channels1 record

Marketing channels4 records

Core offering

Palomar Observatory operates world-class optical and infrared telescopes — including the 200-inch Hale Telescope, the 48-inch Samuel Oschin Schmidt Telescope hosting the ZTF survey, and a 60-inch telescope — along with radio astronomy instruments, providing observing time and astronomical data products to the international research community. It develops and operates specialized survey instruments such as ZTF and the planned Deep Synoptic Array for detecting transient cosmic phenomena. The observatory is operated by Caltech as a non-commercial research facility, with access allocated through collaborative research proposals.

Product overview

Palomar Observatory, operated by Caltech, is an astronomical research facility featuring multiple specialized telescopes and survey instruments. The primary instruments include the Zwicky Transient Facility (ZTF), an automated sky survey system that detects transient phenomena; the 200-inch Hale Telescope for deep optical observations; and the Deep Synoptic Array (DSA), a planned radio telescope array. The observatory also hosts pathfinder instruments like DSA-110 and STARE2 for fast radio burst detection. These instruments collectively support multi-wavelength astronomical research, sky surveys, and transient object detection.

Differentiator

Problem solved

Functional benefit

Brands

• Zwicky Transient Facility (ZTF): An all-sky survey instrument at Palomar Observatory that detects transient astronomical events such as supernovae, black hole flares, and other cosmic phenomena.
• 200-inch Hale Telescope

Products and services

• Zwicky Transient Facility (ZTF) An automated sky survey operating from the 48-inch Samuel Oschin Schmidt Telescope that monitors the sky for transient and variable astronomical phenomena, employing machine learning algorithms to detect and classify supernovae and other changing objects. Serves the international astronomical research community.
• 200-inch Hale Telescope A 200-inch (5.1-meter) optical telescope used for deep space imaging and spectroscopic observations of celestial objects. Available to academic researchers through Caltech's observing time allocation process.
• Deep Synoptic Array (DSA) A planned radio telescope array of 1,650 dishes (each over 6 meters in diameter) spanning approximately 20 x 16 kilometers, designed to be the world's most sensitive radio telescope with real-time imaging capabilities and survey speed 100 times faster than any other radio telescope.
• STARE2 (Survey for Transient Astronomical Radio Emission 2) A suite of three radio receivers designed to detect fast radio bursts (FRBs) originating from within the Milky Way galaxy, with wide field of view coverage and sensitivity to approximately a quarter of the sky.
• DSA-110 A pathfinder project for the Deep Synoptic Array located at Owens Valley Radio Observatory, used to develop and test the performance of DSA's high-performing dishes with surface and pointing accuracies.

Quantifiable outcome

• Discovery of the biggest and most distant black hole flare ever observed
• +1 more outcomes

Segments2 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature2 records

Partnerships

One partnership is on record.

• NASA Jet Propulsion LaboratorycoreStrategic or Co-development PartnerJPL, which Caltech manages for NASA, collaborates on astronomical instrumentation and data analysis from Palomar Observatory, combining space-based and ground-based observational capabilities for enhanced scientific output.

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Square Kilometre Array Observatory (SKAO): International next-generation radio telescope array under construction in South Africa and Australia. Most direct global competitor to the Deep Synoptic Array's planned survey-speed and sensitivity claims.
• Green Bank Observatory: NSF-funded radio astronomy facility operating the Green Bank Telescope and related instruments; the most direct U.S. peer in single-site radio astronomy research with comparable funding model and FRB/pulsar science portfolio.
• Vera C. Rubin Observatory: Operates the LSST all-sky optical survey, the most direct competitor to ZTF's wide-field time-domain mission. Both facilities systematically scan the sky for transient and variable astronomical events and serve the same global research community.

Broad incumbents

• Atacama Large Millimeter/submillimeter Array (ALMA): International millimeter/submillimeter interferometer. Comparable in non-profit, grant-funded operating model and serves overlapping multi-wavelength research and transient follow-up communities that Palomar also supports.
• W. M. Keck Observatory: Operated by Caltech alongside the University of California; offers deep optical and infrared follow-up capability for transients initially detected by Palomar. Effectively part of the same Caltech observatory ecosystem and a primary follow-up node for ZTF/DSA discoveries.
• Gemini Observatory: NSF-funded 8-meter optical/infrared observatory on Mauna Kea and Cerro Pachón. Comparable in operating model — non-profit, federal-funded, time-allocation-based optical-infrared research serving the worldwide community.
• European Southern Observatory (ESO): Intergovernmental operator of VLT, ELT, ALMA, and other observatories. Comparable in mission scope — world-class astronomical research infrastructure serving the global scientific community — though distributed across Chile and broader international sites.
• Space Telescope Science Institute (STScI): Operates Hubble and James Webb Space Telescopes; analogous academic/non-profit astronomical research hub that allocates observing time, processes data, and supports transient/follow-up science for the global community.
• National Radio Astronomy Observatory (NRAO): Operates the Very Large Array and other NSF-funded radio facilities (including Green Bank); the closest U.S. institutional peer to the Deep Synoptic Array in radio astronomy, with overlapping FRB and pulsar science goals.
• LIGO (Laser Interferometer Gravitational-Wave Observatory): Caltech-operated gravitational-wave detector whose triggers Palomar helps follow up optically. They form a tightly coupled multi-messenger astronomy stack — comparable mission-adjacent partner rather than a direct service competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/caltech
• YouTubeyoutube.com/c/CaltechAstro
• Facebookfacebook.com/6391532964
• Instagraminstagram.com/CaltechAstro
• LinkedInlinkedin.com/company/california-institute-of-technology

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Palomar Observatory