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Hipparcos: Regions, Measurement & Science

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions and distances of celestial objects on the sky. This was the first practical attempt at all-sky absolute parallax measurement…

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Hipparcos topic overview

The analysis highlights Regions, Measurement and Science as prominent areas in the source structure around Hipparcos.

Related topics
169
Source areas
14
Connected nodes
183
Extracted relationships
218
Concept neighborhoods
50
Bridge connections
183

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.

Scientific results · 42 topics
Development, launch and operations · 35 topics
Satellite and payload · 16 topics
Overview · 15 topics
Reference frame · 14 topics
Background · 12 topics
Photometric observations · 9 topics
Principles · 8 topics
People · 7 topics
Data reductions · 4 topics
Published catalogues · 3 topics
Radial velocities · 2 topics
Double and multiple stars · 1 topics
Hipparcos Input Catalogue · 1 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.

Apogee altitude
35,797.5 km (22,243.5 mi)
Band
S-Band
Bandwidth
2-23 kbit/s
Contractor
Arianespace
COSPAR ID
1989-062B
Deactivated
August 1993

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

Background

Satellite and payload

Principles

Development, launch and operations

Hipparcos Input Catalogue

Data reductions

Reference frame

Double and multiple stars

Photometric observations

Radial velocities

Published catalogues

Scientific results

People

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 Hipparcos connects Entity context

The extracted context around Hipparcos shows recurring relationship patterns in the source. For example, Hipparcos → Alenia Spazio, Andrew Murray, Bouffard, Catherine Turon, Catherine TuronFranco Emiliani, Dietmar Heger, Erik Høg, ESA, ESA/ESOC, FAST ConsortiumAdriaan Blaauw, Floor, Francesco Donati, Francois Mignard, Hamid Hassan, Hans, Hans Schrijver, Input Catalogue ConsortiumErik Høg, Jean Kovalevsky, Leeuwen, Lennart Lindegren Another extracted example is Hipparcos → Although, Bonn, CCD, Earth, From, Hubble Space Telescope, In, J1991, Kiev, Lick, MERLIN, Potsdam, The, This, Very Large Array, Very-long-baseline, VLA, VLBI, Yale/San Juan. Use these groups to spot repeated connection types before inspecting the individual relationships.

Hipparcos

Top relations

related to People · 40
Hipparcos → Alenia Spazio, Andrew Murray, Bouffard, Catherine Turon, Catherine TuronFranco Emiliani, Dietmar Heger, Erik Høg, ESA, ESA/ESOC, FAST ConsortiumAdriaan Blaauw, Floor, Francesco Donati, Francois Mignard, Hamid Hassan, Hans, Hans Schrijver, Input Catalogue ConsortiumErik Høg, Jean Kovalevsky, Leeuwen, Lennart Lindegren
related to Reference frame · 19
Hipparcos → Although, Bonn, CCD, Earth, From, Hubble Space Telescope, In, J1991, Kiev, Lick, MERLIN, Potsdam, The, This, Very Large Array, Very-long-baseline, VLA, VLBI, Yale/San Juan
related to Photometric observations · 14
Hipparcos → As, Catalogue, Cepheid, Delta Scuti, Hp, In, Johnson UBV, RR Lyrae, The, There, They, Tycho, Tycho-2, Variable
related to Radial velocities · 14
Hipparcos → At, Centre, Classical, Doppler, For, Hipparcos Catalogue, In, More, Radial, Similarly, Specifically, Strasbourg, The, Whilst
related to Satellite and payload · 14
Hipparcos → An, Behind, Hipparcos Catalogue, Hz, Its, Johnson, Originally, Schmidt, The, These, This, Tycho Catalogue, Tycho-2 Catalogue, UBV
related to Scientific results · 14
Hipparcos → Astrographic Catalogue, Combined, Earth-orientation, Galactic, Galaxy's, Implicit, Naval Observatory, Reduction, Schmidt, Sloan Digital Sky Survey, The Hipparcos, These, Tycho-2 Catalogue, UCAC2 Catalogue
related to External links · 13
Hipparcos → Astronomy, CambridgeHipparcos Main Catalogue, CASU Astronomical Data Centre, CDS, CSV, ESAHipparcos, Institute, Mission, StrasbourgHipparcos Astrometry Catalogue, The Hipparcos Space Astrometry, Tycho Catalogues, Tycho-1 Catalogue, University
related to Published catalogues · 12
Hipparcos → FAST, For, Hipparcos Catalogue, Hp, Median, NDAC, Photometric, Some, TDAC, The, The Tycho Catalogue, Tycho Data Analysis Consortium
related to background · 11
Hipparcos → As, By, Compiling, Earth, Earth's, Even, Hubble, Problems, The, This, With
related to Hipparcos Input Catalogue · 10
Hipparcos → Although, HIC, Hipparcos Catalogue, Hipparcos Input Catalogue, INCA Consortium, Input Catalogue, Stars, The, The Input Catalogue, This

Important terminology

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

Important terminology

stars catalogue data satellite space star astrometric reference observations published system two motions sky parallax scientific esa proper tycho mission

Hipparcos relationships Subject–Predicate–Object triples

TTTA extracted 218 structured relationships around Hipparcos. Examples in this analysis include Hipparcos → Apogee altitude → 35,797.5 km (22,243.5 mi) and Hipparcos → Band → S-Band. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
HipparcosApogee altitude35,797.5 km (22,243.5 mi)1.00infobox
HipparcosBandS-Band1.00infobox
HipparcosBandwidth2-23 kbit/s1.00infobox
HipparcosContractorArianespace1.00infobox
HipparcosCOSPAR ID1989-062B1.00infobox
HipparcosDeactivatedAugust 19931.00infobox
HipparcosDiameter29 cm (11 in)1.00infobox
HipparcosDisposaldecommissioned1.00infobox
HipparcosDry mass635 kg (1,400 lb)1.00infobox
HipparcosEntered serviceAugust 19891.00infobox
HipparcosFocal length1.4 m (4 ft 7 in)1.00infobox
HipparcosInclination6.84°1.00infobox
HipparcosLaunch date8 August 1989, 23:25:53 UTC1.00infobox
HipparcosLaunch mass1,140 kg (2,510 lb)1.00infobox
HipparcosLaunch siteCentre Spatial Guyanais, Kourou, ELA-21.00infobox
HipparcosManufacturerAlenia Spazio Matra Marconi Space1.00infobox
HipparcosMission duration2.5 years (planned) 4 years (achieved)1.00infobox
HipparcosMission typeAstrometric observatory1.00infobox
HipparcosNamesHIPPARCOS1.00infobox
HipparcosOperatorESA1.00infobox
HipparcosPayload mass210 kg (460 lb)1.00infobox
HipparcosPerigee altitude500.3 km (310.9 mi)1.00infobox
HipparcosPeriod636.9 minutes1.00infobox
HipparcosPower295 watts1.00infobox
HipparcosReference systemGeocentric orbit1.00infobox
HipparcosRegimeGeostationary transfer orbit Geostationary orbit (planned)1.00infobox
HipparcosRevolution no.178301.00infobox
HipparcosRocketAriane 44LP H10 (V33)1.00infobox
HipparcosSATCAT no.201691.00infobox
HipparcosSpacecraftHIPPARCOS1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Hipparcos bring nearby vocabulary together. In this analysis, examples include Catalogue, Satellite and Stars. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Hipparcos
    • Catalogue
    • Satellite
    • Stars
    • Star
    • Published
    • Reference
    • Space
    • Esa
    • Scientific
    • Tycho
    • Astrometric
    • Data
  • hipparcos
    • Catalogue
    • Satellite
    • Stars
    • Star
    • Published
    • Reference
    • Space
    • Esa
    • Scientific
    • Tycho
    • Astrometric
    • Data
  • satellite
    • Observations
    • Space
    • Data
    • Catalogue
    • Stars
    • Multiple
    • Parallax
    • Mission
    • Scientific
    • Astrometric
    • Published
    • System
  • absolute positions
    • Proper
    • Precision
    • Resulting
    • Measurements
    • Motion
    • Stars
    • Sky
    • Motions
    • Observations
    • Star
    • Satellite
    • Distance
  • proper motions
    • Motions
    • Proper
    • Motion
    • Stars
    • Stellar
    • Resulting
    • Velocity
    • Radial
    • Space
    • Reference
    • Parallax
    • Star
  • radial velocity
    • Motion
    • Radial
    • Velocity
    • Proper
    • Distance
    • Resulting
    • Space
    • Multiple
    • Parallax
    • Stellar
    • Astrometric
    • Motions
  • tycho-2 catalogue
    • Hipparcos
    • Stars
    • Published
    • Tycho
    • Frame
    • Data
    • Reference
    • Astrometric
    • Satellite
    • Observations
    • Multiple
    • Resulting
  • astrometric
    • Photometric
    • Magnitude
    • Multiple
    • Observations
    • Mission
    • Data
    • Sky
    • Catalogue
    • Reference
    • Hipparcos
    • Measurements
    • Period

Connections between topic areas Semantic bridges

For Hipparcos, one of the stronger structural bridges in this analysis connects Hipparcos with Scientific results. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
Hipparcos — Scientific results · splits 141 ⟂ 43
Hipparcos — Development, launch and operations · splits 148 ⟂ 36
Hipparcos — Satellite and payload · splits 167 ⟂ 17
Hipparcos — Overview · splits 168 ⟂ 16
Hipparcos — Reference frame · splits 169 ⟂ 15
Hipparcos — Background · splits 171 ⟂ 13
Hipparcos — Photometric observations · splits 174 ⟂ 10
Hipparcos — Principles · splits 175 ⟂ 9
Hipparcos — People · splits 176 ⟂ 8
Hipparcos — Data reductions · splits 179 ⟂ 5
Hipparcos — Published catalogues · splits 180 ⟂ 4
Hipparcos — Radial velocities · splits 181 ⟂ 3

Map overview Semantic statistics

Hipparcos

Nodes184
Edges183
Triples218
Avg. degree1.99
Density0.01087
Components1

Source & methodology

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

Source: Wikipedia — Hipparcos · EN edition · Analysis: TopicsToTalkAbout

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