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Explorer 49: Spacecraft, Launch & Experiments

Explorer 49 (also called Radio Astronomy Explorer-2, RAE-B) was a NASA 328 kg (723 lb) satellite launched on 10 June 1973, for long wave radio astronomy research. It had four 230 m (750 ft) X-shaped antenna elements, which made it one of the largest spacecraft ever built.

Language: English [EN]
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Explorer 49 topic overview

The analysis highlights Spacecraft, Launch and Experiments as prominent areas in the source structure around Explorer 49.

Related topics
32
Source areas
6
Connected nodes
38
Extracted relationships
62
Concept neighborhoods
16
Bridge connections
38

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.

Spacecraft · 11 topics
Experiments · 6 topics
Launch · 6 topics
Orbit · 5 topics
Overview · 3 topics
Mission · 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.

Aposelene altitude
1,064 km (661 mi)
Bus
RAE
Contractor
Douglas Aircraft Company
COSPAR ID
1973-039A
Destroyed
September 1977
Dimensions
92 cm (36 in) diameter and 79 cm (31 in) high

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

Mission

Spacecraft

Launch

Orbit

Experiments

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 Explorer 49 connects Entity context

The extracted context around Explorer 49 shows recurring relationship patterns in the source. For example, Explorer 49 → Astronautix, Delta-95, Explorer, Launch/Trajectory, Lunar Mission Launch Opportunities, Page, Proposed, Radio Astronomy ExplorersNational Space, Radio-Astronomy-Explorer-2 Satellite, RAE-B, RAE-B Camera, RAE-B Operations SummaryOn Obtaining, Report, Science Data Center Page Another extracted example is Explorer 49 → American, Apollo, Cape Canaveral, Clementine, Delta, Explorer, It, June, LC-17B, Moon, UTC. Use these groups to spot repeated connection types before inspecting the individual relationships.

Explorer 49

Top relations

related to External links · 14
Explorer 49 → Astronautix, Delta-95, Explorer, Launch/Trajectory, Lunar Mission Launch Opportunities, Page, Proposed, Radio Astronomy ExplorersNational Space, Radio-Astronomy-Explorer-2 Satellite, RAE-B, RAE-B Camera, RAE-B Operations SummaryOn Obtaining, Report, Science Data Center Page
related to Launch · 11
Explorer 49 → American, Apollo, Cape Canaveral, Clementine, Delta, Explorer, It, June, LC-17B, Moon, UTC
related to Orbit · 11
Explorer 49 → After, Earth, Explorer, Initially, June, Moon, November, Sun, The, UTC, V-antenna
Aposelene altitude · 1
Explorer 49 → 1,064 km (661 mi)
Bus · 1
Explorer 49 → RAE
Contractor · 1
Explorer 49 → Douglas Aircraft Company
COSPAR ID · 1
Explorer 49 → 1973-039A
Destroyed · 1
Explorer 49 → September 1977
Dimensions · 1
Explorer 49 → 92 cm (36 in) diameter and 79 cm (31 in) high
Entered service · 1
Explorer 49 → 10 June 1973

Important terminology

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

Important terminology

spacecraft orbit frequency lunar receiver radio receivers burst antenna explorer launch v-antenna mission system data time astronomy also 49 ft

Explorer 49 relationships Subject–Predicate–Object triples

TTTA extracted 62 structured relationships around Explorer 49. Examples in this analysis include Explorer 49 → Aposelene altitude → 1,064 km (661 mi) and Explorer 49 → Bus → RAE. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
Explorer 49Aposelene altitude1,064 km (661 mi)1.00infobox
Explorer 49BusRAE1.00infobox
Explorer 49ContractorDouglas Aircraft Company1.00infobox
Explorer 49COSPAR ID1973-039A1.00infobox
Explorer 49DestroyedSeptember 19771.00infobox
Explorer 49Dimensions92 cm (36 in) diameter and 79 cm (31 in) high1.00infobox
Explorer 49Entered service10 June 19731.00infobox
Explorer 49Inclination55.70°1.00infobox
Explorer 49Last contactAugust 19771.00infobox
Explorer 49Launch date10 June 1973, 14:13:00 UTC1.00infobox
Explorer 49Launch mass330.2 kg1.00infobox
Explorer 49Launch siteCape Canaveral, LC-17B1.00infobox
Explorer 49ManufacturerGoddard Space Flight Center1.00infobox
Explorer 49Mission duration4 years and 2 months (achieved)1.00infobox
Explorer 49Mission typeRadio astronomy1.00infobox
Explorer 49NamesRAE-B RAE-2 Radio Astronomy Explorer-21.00infobox
Explorer 49OperatorNASA1.00infobox
Explorer 49Orbital insertion15 June 1973, 07:21 UTC1.00infobox
Explorer 49Period221.17 minutes1.00infobox
Explorer 49Periselene altitude1,053 km (654 mi)1.00infobox
Explorer 49Power25 watts1.00infobox
Explorer 49Reference systemSelenocentric orbit1.00infobox
Explorer 49RocketThor-Delta 1913 (Thor 581 / Delta 095)1.00infobox
Explorer 49SATCAT no.066861.00infobox
Explorer 49SpacecraftExplorer XLIX1.00infobox
Explorer 49Spacecraft typeRadio Astronomy Explorer1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Explorer 49 bring nearby vocabulary together. In this analysis, examples include Astronomy, Mission and Rae-b. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • Explorer 49
    • Astronomy
    • Mission
    • Rae-b
    • Radio
    • Launch
    • Orbit
    • Nasa
    • Impedance
    • Kg
    • Probe
    • Spacecraft
    • Step
  • explorer 49
    • Astronomy
    • Mission
    • Rae-b
    • Radio
    • Launch
    • Orbit
    • Nasa
    • Impedance
    • Kg
    • Probe
    • Spacecraft
    • Step
  • radio astronomy
    • Rae-b
    • Explorer
    • Mission
    • Orbit
    • Nasa
    • Radio
    • Impedance
    • Kg
    • Probe
    • Step
    • Launch
    • Radiometers
  • lunar orbit
    • Radio
    • Lunar
    • Orbit
    • Moon
    • Spacecraft
    • Rae-b
    • Probe
    • Step
    • Utc
    • V-antenna
    • Radiometers
    • Mission
  • ultra high frequency
    • Radio
    • High
    • Receivers
    • Orbit
    • Impedance
    • Probe
    • Step
    • Kg
    • Mission
    • Radiometers
    • Rae-b
    • Utc
  • very high frequency
    • Radio
    • High
    • Receivers
    • Orbit
    • Impedance
    • Probe
    • Step
    • Kg
    • Mission
    • Radiometers
    • Rae-b
    • Utc
  • explorer 38
    • Astronomy
    • Mission
    • Rae-b
    • Radio
    • Launch
    • Orbit
    • Nasa
    • Impedance
    • Kg
    • Probe
    • Spacecraft
    • Step
  • radio frequency amplifiers
    • Orbit
    • Rae-b
    • Mission
    • Frequency
    • Radio
    • High
    • Lunar
    • Launch
    • Nasa
    • Impedance
    • Kg
    • Probe

Connections between topic areas Semantic bridges

For Explorer 49, one of the stronger structural bridges in this analysis connects Explorer 49 with Spacecraft. 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
Explorer 49 — Spacecraft · splits 27 ⟂ 12
Explorer 49 — Launch · splits 32 ⟂ 7
Explorer 49 — Experiments · splits 32 ⟂ 7
Explorer 49 — Orbit · splits 33 ⟂ 6
Explorer 49 — Overview · splits 35 ⟂ 4

Map overview Semantic statistics

Explorer 49

Nodes39
Edges38
Triples62
Avg. degree1.95
Density0.051282
Components1

Source & methodology

TTTA analyzes the structure around Explorer 49 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Spacecraft, Launch & Experiments, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Explorer 49 · EN edition · Analysis: TopicsToTalkAbout

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