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AS 209: Regions & Overview

AS 209 is a young pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun. It has a mass of 0.9 solar masses and a luminosity of 1.5 solar luminosity. It is only somewhere between 0.5-1.0 million years old. Surrounding AS 209 is a remarkable protoplanetary disk. This disk is separated into several…

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AS 209 topic overview

The analysis highlights Regions and Overview as prominent areas in the source structure around AS 209.

Related topics
17
Source areas
1
Connected nodes
18
Extracted relationships
9
Concept neighborhoods
14
Bridge connections
18

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Overview · 17 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Apparent magnitude (V)
11.28
Constellation
Ophiuchus
Declination
–14° 22′ 08.64″
Evolutionary stage
pre-main sequence
Right ascension
16h 49m 15.303s
Spectral type
K4Ve

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How AS 209 connects Entity context

The extracted context around AS 209 shows recurring relationship patterns in the source. For example, AS 209 → remarkable protoplanetary disk, young pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun Another extracted example is AS 209 → 11.28. Use these groups to spot repeated connection types before inspecting the individual relationships.

AS 209

Top relations

is a · 2
AS 209 → remarkable protoplanetary disk, young pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun
Apparent magnitude (V) · 1
AS 209 → 11.28
Constellation · 1
AS 209 → Ophiuchus
Declination · 1
AS 209 → –14° 22′ 08.64″
Evolutionary stage · 1
AS 209 → pre-main sequence
Right ascension · 1
AS 209 → 16h 49m 15.303s
Spectral type · 1
AS 209 → K4Ve
Variable type · 1
AS 209 → T Tauri

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

star disk 209 gap variable outer mass rings protoplanetary young masses million old au found periodic variability shows orbiting first

AS 209 relationships Subject–Predicate–Object triples

TTTA extracted 9 structured relationships around AS 209. Examples in this analysis include AS 209 → Apparent magnitude (V) → 11.28 and AS 209 → Constellation → Ophiuchus. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
AS 209Apparent magnitude (V)11.281.00infobox
AS 209ConstellationOphiuchus1.00infobox
AS 209Declination–14° 22′ 08.64″1.00infobox
AS 209Evolutionary stagepre-main sequence1.00infobox
AS 209Right ascension16h 49m 15.303s1.00infobox
AS 209Spectral typeK4Ve1.00infobox
AS 209Variable typeT Tauri1.00infobox
AS 209is ayoung pre-main-sequence K-type star located in the Ophiuchus star formation region about 126 parsecs from the Sun0.90text
AS 209is aremarkable protoplanetary disk0.90text

Related concept clusters Concept neighborhoods

The concept neighborhoods around AS 209 bring nearby vocabulary together. In this analysis, examples include Formation, Located and Pre-main-sequence. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • k-type star
    • Formation
    • Located
    • Pre-main-sequence
    • Sun
    • Ophiuchus
    • Young
    • Variable
    • Around
    • Distance
    • Orbiting
    • Periodic
    • Shows
  • ophiuchus star formation region
    • K-type
    • Located
    • Pre-main-sequence
    • Sun
    • Formation
    • Ophiuchus
    • Young
    • Around
    • Distance
    • Luminosity
    • Prominent
    • Tauri
  • variable star
    • Tauri
    • V1121
    • Star
    • Starspots
    • Variable
    • Around
    • Distance
    • Found
    • Luminosity
    • Ophiuchus
    • Periodic
    • Prominent
  • variable star designation
    • Tauri
    • V1121
    • Star
    • Starspots
    • Variable
    • Around
    • Distance
    • Found
    • Luminosity
    • Ophiuchus
    • Periodic
    • Prominent
  • t tauri star
    • Variable
    • Starspots
    • Around
    • Distance
    • Periodic
    • V1121
    • Variability
    • Protoplanetary
    • Rings
    • Ophiuchus
    • Orbiting
    • Shows
  • protoplanetary disk
    • Protoplanetary
    • Distance
    • Mass
    • Outer
    • Tauri
    • V1121
    • Gap
    • Rings
    • Variable
    • Exoplanet
    • Saturn-like
    • Star
  • exoplanet
    • Saturn-like
    • Distance
    • Orbiting
    • Mass
    • Outer
    • Gap
    • Star
  • hipparcos
    • Periodic
    • Shows
    • Variability
    • Star

Connections between topic areas Semantic bridges

Bridges highlight paths between different parts of the AS 209 map and can reveal research angles that are easy to miss in a flat list.

Min side: 3

Map overview Semantic statistics

AS 209

Nodes19
Edges18
Triples9
Avg. degree1.89
Density0.105263
Components1

Source & methodology

TTTA analyzes the structure around AS 209 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Regions & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — AS 209 · EN edition · Analysis: TopicsToTalkAbout

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