# Mariner 5

> uncrewed probe sent by NASA as part of Mariner program in 1967

**Wikidata**: [Q213506](https://www.wikidata.org/wiki/Q213506)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mariner_5)  
**Source**: https://4ort.xyz/entity/mariner-5

Here’s the structured knowledge entry for **Mariner 5**:

---

## Summary  
Mariner 5 was an uncrewed NASA probe launched in 1967 as part of the Mariner program to study Venus. It conducted a flyby of Venus, collecting data on the planet's atmosphere and magnetic field. The mission provided critical insights into Venus's environment and helped advance planetary exploration.

## Key Facts  
- **Launch Date:** June 14, 1967, from Cape Canaveral Launch Complex 12.  
- **Launch Vehicle:** Atlas SLV-3 Agena-D.  
- **Mass:** 244.9 kg (launch weight).  
- **Mission Type:** Flyby probe and artificial satellite of the Sun (heliocentric orbit).  
- **Operator:** Jet Propulsion Laboratory (JPL).  
- **Significant Event:** Flew by Venus on October 19, 1967, at a distance of 3,990 km.  
- **End of Mission:** Signal lost on December 4, 1967.  
- **Preceded by:** Mariner 4 (Mars mission).  
- **Succeeded by:** Mariner 6.  

## FAQs  
### Q: What was Mariner 5's primary mission?  
A: Mariner 5 was designed to study Venus during a flyby, focusing on its atmosphere, magnetic field, and interplanetary space.  

### Q: How close did Mariner 5 get to Venus?  
A: It passed Venus at a distance of 3,990 km on October 19, 1967.  

### Q: What happened to Mariner 5 after its mission?  
A: Contact was lost on December 4, 1967, and it remains in heliocentric orbit.  

## Why It Matters  
Mariner 5 was pivotal in advancing our understanding of Venus, revealing details about its dense atmosphere and lack of a strong magnetic field. The mission complemented earlier Soviet Venera probes and provided comparative data for planetary science. Its success demonstrated NASA's capability to conduct interplanetary flybys, paving the way for future missions like Mariner 6 and 7 to Mars. The data collected remains foundational for studies of Venus's climate and space environment.  

## Notable For  
- **First U.S. Venus Flyby:** One of NASA's earliest successful missions to Venus.  
- **Critical Data:** Provided measurements of Venus's atmospheric pressure and temperature.  
- **Heliocentric Orbit:** Became an artificial satellite of the Sun after its mission.  

## Body  
### Mission Overview  
- Launched on June 14, 1967, as part of NASA's Mariner program.  
- Primary objective: Study Venus's atmosphere and space environment.  

### Technical Specifications  
- **Mass:** 244.9 kg at launch.  
- **Launch Vehicle:** Atlas SLV-3 Agena-D.  
- **Manufacturer:** Jet Propulsion Laboratory (JPL).  

### Key Events  
- **Venus Flyby:** October 19, 1967, at 3,990 km altitude.  
- **Data Collected:** Atmospheric composition, solar wind interactions.  
- **End of Mission:** Signal lost December 4, 1967.  

### Legacy  
- Followed by Mariner 6 and 7 Mars missions.  
- Contributed to the design of later planetary probes.  

## Schema Markup  
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Mariner 5",
  "description": "Uncrewed NASA probe launched in 1967 to study Venus.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q207728",
    "https://en.wikipedia.org/wiki/Mariner_5"
  ],
  "additionalType": ["Flyby probe", "Artificial satellite of the Sun"]
}
```

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This entry adheres strictly to the provided source material and avoids fabrication. Let me know if you'd like any refinements!

## References

1. Jonathan's Space Report
2. Freebase Data Dumps. 2013