RR Lyrae

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Explore the main themes, entities and connections around RR Lyrae. Start with the topic map, then use the sections below for research and deeper semantic analysis.

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Variable star class

Evolved Main sequence Red giant Thermonuclear fusion Horizontal branch

14 related topics

History

Williamina Fleming Harvard Observatory Hubble Space Telescope Fine guidance sensor Margin of error

8 related topics

Other stellar classifications

Metallicity Population II Eccentricity Galactic Center Periapsis

6 related topics

Overview

Variable star Lyra Cygnus RR Lyrae variable Standard candles

7 related topics

Key facts & relationships

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

Apparent magnitude (V): 7.06–8.12
B−V color index: +0.181
Constellation: Lyra
Declination: +42° 47′ 03.6942″
Evolutionary stage: horizontal branch
Right ascension: 19h 25m 27.91285s

Topics to explore

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Overview

History

Variable star class

Other stellar classifications

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.

Map overview Semantic statistics

Nodes40

Edges39

Triples51

Avg. degree1.95

Density0.05

Components1

How this topic connects Entity context

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RR Lyrae

Top relations

related to Variable star class · 14

RR Lyrae → Blazhko, Each, Energy, HB, In, It, RR Lyrae-type, Russian, Sergey Blazhko, Sun's, The, This, Time-series, When

related to External links · 10

RR Lyrae → Copernicus Series, Illinois, ISBN, James, Kaler, RR LYR, Springer, Stars, The, University

related to Other stellar classifications · 10

RR Lyrae → As, Galactic Center, It, Milky Way, Population II, RR Lyrae, RR Lyrae-type, The, The Blazhko, Universe

related to history · 7

RR Lyrae → Harvard Observatory, Hipparcos, Hubble Space Telescope's, Scottish, The, When, Williamina Fleming

Apparent magnitude (V) · 1

RR Lyrae → 7.06–8.12

B−V color index · 1

RR Lyrae → +0.181

Constellation · 1

RR Lyrae → Lyra

Declination · 1

RR Lyrae → +42° 47′ 03.6942″

Evolutionary stage · 1

RR Lyrae → horizontal branch

Right ascension · 1

RR Lyrae → 19h 25m 27.91285s

Important terminology Word statistics

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

Important terminology

rr lyrae variable star distance stars pulsation temperature class type lyra variables period allows determined mass luminosity stage constellation metallicity

Entity relationships Subject–Predicate–Object triples

Subject	Predicate	Object	Confidence	Src
RR Lyrae	Apparent magnitude (V)	7.06–8.12	1.00	infobox
RR Lyrae	B−V color index	+0.181	1.00	infobox
RR Lyrae	Constellation	Lyra	1.00	infobox
RR Lyrae	Declination	+42° 47′ 03.6942″	1.00	infobox
RR Lyrae	Evolutionary stage	horizontal branch	1.00	infobox
RR Lyrae	Right ascension	19h 25m 27.91285s	1.00	infobox
RR Lyrae	Spectral type	A7III - F8III	1.00	infobox
RR Lyrae	U−B color index	+0.172	1.00	infobox
RR Lyrae	Variable type	RR Lyr	1.00	infobox
RR Lyrae	is a	variable star in the Lyra constellation	0.90	text
RR Lyrae	related to External links	Kaler	0.60	section
RR Lyrae	related to External links	James	0.60	section

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Connections between topic areas Semantic bridges

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