About
COBS — the Comet OBServation database — is the world's largest freely accessible repository of comet observations, maintained by Crni Vrh Observatory since 2010. Designed to bridge the gap between professional and amateur astronomy, COBS empowers observers worldwide to submit, visualize, and analyze comet data from a single platform. Observations are submitted through a web-based form and stored in the widely recognized ICQ (International Comet Quarterly) format within an SQL database. Data can be queried, plotted as light curves, and exported for further scientific processing or publication. The platform currently holds over 306,900 observations covering more than 1,790 distinct comets, making it an unparalleled resource for comet science. Beyond data submission, COBS provides a suite of practical tools for active observers: a comet planner for scheduling nightly sessions, real-time ephemeris calculations, a curated image archive, and a dedicated statistics module for trend analysis. The platform also offers a public API, enabling developers and researchers to programmatically access the observation dataset for custom analyses and integrations. COBS is freely available to everyone who adheres to its data usage policy, making it invaluable for students, citizen scientists, and professional researchers studying cometary behavior, outbursts, and light-curve evolution. Regular news updates and educational articles keep the community informed about the latest discoveries and observational techniques.
Key Features
- Observation Submission & ICQ Format: Submit comet observations via a web-based form that stores data in the standardized ICQ format, making contributions compatible with international scientific archives.
- Data Query, Plotting & Export: Search and filter the database, generate light curves and brightness plots, and export observations for external analysis or publication.
- Comet Planner & Ephemeris: Plan observation sessions with location-aware comet visibility tables, real-time ephemeris data, and finding charts for currently visible comets.
- Image Archive & Statistics: Browse a curated archive of comet images contributed by observers worldwide, alongside statistical breakdowns of observation trends and comet activity.
- Public COBS API: Programmatically access the full comet observation dataset through a dedicated API, enabling custom integrations, research pipelines, and data visualization projects.
Use Cases
- Amateur astronomers submitting nightly comet brightness observations to contribute to international scientific records.
- Researchers analyzing historical light curves and comet magnitude trends for academic publications.
- Astronomy students exploring real observational data to study comet behavior, outbursts, and orbital dynamics.
- Developers and data scientists accessing the COBS API to build custom comet tracking tools or integrate comet data into applications.
- Observatory coordinators planning observation sessions using the comet planner and ephemeris tools to target currently visible comets.
Pros
- Largest Comet Observation Repository: With 306,900+ observations of 1,790+ comets, COBS provides an unmatched historical and real-time dataset for comet research.
- Completely Free to Use: All data is freely accessible to anyone who follows the data usage policy, lowering barriers for amateur astronomers, students, and researchers.
- End-to-End Workflow: Covers the full observation cycle — from planning and submitting observations to analyzing trends and exporting data — all within one platform.
- Community-Driven Science: Enables amateur astronomers to make genuine scientific contributions by filling the observational gaps that professional observatories cannot cover.
Cons
- Highly Niche Audience: The platform is purpose-built for comet observation and is of limited relevance outside of astronomy and space science communities.
- Registration Required for Submissions: While data browsing is open to all, contributing observations requires creating a registered account.
- Minimal Modern UI: The interface is functional but dated, lacking the polished UX of modern data platforms, which may present a learning curve for new users.
Frequently Asked Questions
What is COBS?
COBS (Comet OBServation database) is a free, web-based platform maintained by Crni Vrh Observatory that allows comet observers worldwide to submit, view, and analyze comet observations. It has been active since 2010 and is the largest database of its kind.
Who can submit comet observations to COBS?
Any registered user can submit observations. The platform primarily serves amateur astronomers who contribute regular observational data that professional observatories often lack the telescope time to gather.
What format are observations stored in?
Observations are stored in ICQ (International Comet Quarterly) format within an SQL database, ensuring compatibility with international comet data standards.
Is the COBS data free to use for research?
Yes, all data in COBS is freely available to anyone who honors the COBS data usage policy. Users are asked to cite COBS as a reference if the data is used in scientific publications or studies.
Does COBS offer a developer API?
Yes, COBS provides a public API that allows developers and researchers to programmatically query and retrieve comet observation data for custom analyses, applications, or research workflows.
