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AsteriaStar

Exoplanet

HD 209458 b

A hot Jupiter and the first exoplanet observed transiting its host star and to have its atmosphere detected.

Type
Exoplanet
Domain
Scientific connections
Connections
6

Experience system V6

Exoplanet profile

A planet-discovery layout that prioritizes host star, detection method, transit context, and habitability claims only when sourced.

Transit schematicHost-star graphAtlas contextMeasured facts
  1. 01

    Observe

    The page falls back to graph and source evidence when no cleared image is available.

  2. 02

    Measure

    Measurement panels use graph coverage, catalog identifiers, and source availability without inventing values.

  3. 03

    Locate

    Child of HD 209458.

  4. 04

    Connect

    6 graph relations shape the knowledge viewport.

Object type
Exoplanet
Graph relations
6
Verified sources
2
Image records
0
Domain
Scientific connections
Status
Graph entity

Scientific map

Orbit context

SunHD 209458 bCatalog position context
Primary orbital anchor
Sun
Measured orbit field
Orbital distance not recorded in this graph record

Original SVG diagram

Scientific schematic

Optical pathCollected lightFocal plane / instrumentExoplanet
Object class
Exoplanet
Catalog numbers
Not recorded
Graph relations
6
Sources
2
Gas giantHD 209458HD 209458NASA Exoplanet Ar...Radial Velocity M...W. M. Keck Observ...HD 209458 bExoplanet

Visual knowledge graph

Relationships, not isolated facts

This viewport is generated from the Asteria knowledge graph. Science, culture, and interpretive links remain separated by domain so visual context never changes the evidentiary meaning of a relation.

Continue the atlas

Curated next objects

star

HD 209458

A Sun-like star in Pegasus whose planet HD 209458 b was the first exoplanet observed transiting its star.

exoplanet detection method

Radial Velocity Method

Measuring the gravitational wobble a planet induces in its star.

observatory

W. M. Keck Observatory

The W. M. Keck Observatory is an astronomical observatory on Mauna Kea, Hawaii, operating two of the largest optical and infrared telescopes in the world.

exoplanet catalogue

NASA Exoplanet Archive

The NASA Exoplanet Archive is the authoritative catalogue of confirmed exoplanets and their measured parameters.

planetary class

Gas giant

Large planets dominated by hydrogen and helium, larger than about 5.5 Earth radii.

exoplanet

14 Her b

14 Her b is a gas giant orbiting 14 Her, discovered in 2002 by the radial velocity method.

Data

Scientific data & provenance

Data & provenance

Stable ID
exoplanet:hd-209458-b
Type
Exoplanet
Domain
Scientific connections
Relationships
6
Graph version
1.0.0

Dataset membership

Open data

In the graph export: graph.json · graph.jsonld

Planned API: GET /api/v0/entities/exoplanet:hd-209458-b

Scientific quality

Complete
Reviewed2 sourcesv1.0.0

5 of 5 applicable dimensions complete

Description
Complete
Source coverage
Complete
Relationship coverage
Complete
Review coverage
Complete
Citation coverage
Complete
Image coverage
Not applicable
Timeline coverage
Not applicable

Scientific entity. Dimensions that cannot apply to this object are excluded rather than counted as gaps. See the evidence framework and authority dashboard.

Provenance & sources

review 2026.1

Asteria Scientific Review Process · verification: sourced · accurate

Reviewed by the internal Asteria Scientific Review Process — not an external institutional review. See the evidence framework and authority dashboard.

Scientific citations

2

Real, source-backed references — primary papers first, then datasets and institutional sources. Formatted through the citation engine; nothing is fabricated.

  • Peer-reviewed paperDetection of Planetary Transits Across a Sun-like Star

    David Charbonneau et al. · The Astrophysical Journal 529, L45 · 2000

    The Astrophysical Journal · doi:10.1086/312457

    Cite (APA / BibTeX)
    David Charbonneau, Timothy M. Brown, David W. Latham, & Michel Mayor (2000). Detection of Planetary Transits Across a Sun-like Star. The Astrophysical Journal 529, L45. The Astrophysical Journal. https://doi.org/10.1086/312457

@misc{cite:charbonneau-2000,
  title        = {Detection of Planetary Transits Across a Sun-like Star},
  author       = {David Charbonneau and Timothy M. Brown and David W. Latham and Michel Mayor},
  organization = {The Astrophysical Journal},
  howpublished = {The Astrophysical Journal 529, L45},
  year         = {2000},
  doi          = {10.1086/312457},
  url          = {https://doi.org/10.1086/312457},
  note         = {First detection of an exoplanet transit (HD 209458 b).}
}
  • Archive pageHD 209458 b — NASA Exoplanet Archive

    NASA Exoplanet Science Institute (Caltech/IPAC)

    Cite (APA / BibTeX)
    NASA Exoplanet Science Institute (Caltech/IPAC) (n.d.). HD 209458 b — NASA Exoplanet Archive. NASA Exoplanet Science Institute (Caltech/IPAC). https://exoplanetarchive.ipac.caltech.edu/

@misc{cite:exoarchive-exoplanet-hd-209458-b,
  title        = {HD 209458 b — NASA Exoplanet Archive},
  organization = {NASA Exoplanet Science Institute (Caltech/IPAC)},
  year         = {n.d.},
  url          = {https://exoplanetarchive.ipac.caltech.edu/},
  note         = {Confirmed parameters and discovery references for HD 209458 b.}
}

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Sources & references

The primary and reference sources this topic draws on.

  • NASANational Aeronautics and Space Administration

    Mission data, planetary science, space telescopes, and public-domain imagery.

    Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.

  • ESAEuropean Space Agency

    European missions, observatories, and space science imagery.