# Transit O-4
**Wikidata**: [Q9361195](https://www.wikidata.org/wiki/Q9361195)  
**Source**: https://4ort.xyz/entity/transit-o-4

## Summary
Transit O-4 was a geodetic satellite launched on June 24, 1965. It was designed for the research and application of geodesy, contributing to the study of Earth's shape, gravity field, and precise positioning.

## Key Facts
*   Transit O-4 is classified as a geodetic satellite.
*   It was launched on June 24, 1965.
*   The launch vehicle used was the Thor-Ablestar expendable launch system.
*   Transit O-4 was launched from Vandenberg Space Launch Complex 2.
*   Its COSPAR ID is 1965-048A.
*   Its SCN (Space Catalog Number) is 01420.

## FAQs
### Q: What is Transit O-4?
A: Transit O-4 is an artificial satellite specifically designed for the research and application of geodesy. It was launched in 1965.

### Q: When was Transit O-4 launched?
A: Transit O-4 was launched on June 24, 1965.

### Q: What type of satellite is Transit O-4?
A: Transit O-4 is a geodetic satellite, meaning it is used for studying the Earth's shape, gravity field, and precise positioning.

### Q: From where was Transit O-4 launched?
A: Transit O-4 was launched from Vandenberg Space Launch Complex 2.

### Q: What launch vehicle was used for Transit O-4?
A: The launch vehicle used for Transit O-4 was the Thor-Ablestar, an American expendable launch system.

## Why It Matters
Transit O-4 holds significance as a geodetic satellite, playing a role in the research and application of geodesy. Geodesy is the scientific discipline concerned with measuring and understanding Earth's geometric shape, orientation in space, and gravity field. Satellites like Transit O-4 contribute crucial data for these studies, enabling more accurate mapping, navigation systems, and a deeper comprehension of global geophysical phenomena. By providing precise measurements, geodetic satellites help scientists track changes in sea level, ice sheets, and tectonic plate movements, which are vital for climate monitoring and hazard prediction. The data gathered by such satellites supports various scientific and practical applications, from improving global positioning systems to informing our understanding of Earth's dynamic processes. Its contribution as a geodetic satellite underscores its importance in advancing our knowledge of the planet.

## Notable For
*   Its classification as a geodetic satellite, dedicated to the research and application of geodesy.
*   Being launched by the Thor-Ablestar expendable launch system.
*   Its launch from Vandenberg Space Launch Complex 2.

## Body
### Overview
Transit O-4 is identified as an artificial satellite. Its primary classification is a geodetic satellite, which is an artificial satellite used in the research and application of geodesy.

### Launch Details
*   **Launch Date:** June 24, 1965
*   **Launch Site:** Vandenberg Space Launch Complex 2
*   **Launch Vehicle:** Thor-Ablestar
    *   The Thor-Ablestar is an American expendable launch system.

### Identifiers
*   **SCN (Space Catalog Number):** 01420
*   **COSPAR ID:** 1965-048A

## References

1. Jonathan's Space Report