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AsteriaStar

Star

HD 209458

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

Type
Star
Domain
Scientific connections
Connections
3

Experience system V6

Stellar observatory profile

A star reading built around classification, catalog identity, observational context, and connected systems.

Stellar structureCatalog identitySky atlasSpectral cue
  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

    Belongs to Pegasus.

  4. 04

    Connect

    3 graph relations shape the knowledge viewport.

Object type
Star
Graph relations
3
Verified sources
2
Image records
0
Domain
Scientific connections
Status
Graph entity

Scientific map

Atlas context

HD 209458coordinate fields shown only when available
  • Belongs to

    Pegasus

  • Parent of

    HD 209458 b

  • Orbited by

    HD 209458 b

Original SVG diagram

Stellar structure

Stellar readingCore and radiative regionsPhotosphere / visible surfaceSpectral observations requiredHD 209458
Classification
Star
Catalog numbers
Not recorded
Graph relations
3
Evidence sources
2
HD 209458 bHD 209458 bPegasusHD 209458Star

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

constellation

Pegasus

A northern constellation, one of the 88 modern constellations, recognizable by the Great Square asterism.

exoplanet

HD 209458 b

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

planetary class

Gas giant

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

exoplanet catalogue

NASA Exoplanet Archive

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

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.

Data

Scientific data & provenance

Data & provenance

Stable ID
star:hd-209458
Type
Star
Domain
Scientific connections
Relationships
3
Graph version
1.0.0

Dataset membership

Open data

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

Planned API: GET /api/v0/entities/star:hd-209458

Scientific quality

Substantial
Unreviewed2 sourcesv1.0.0

3 of 5 applicable dimensions complete

Description
Complete
Source coverage
Complete
Relationship coverage
Complete
Review coverage
None
Citation coverage
None
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.

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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.