# Lockheed Delta
*launch services*

## Specifications
- **merge suggestions**: [{"slug":"lockheed-atlas-ii","name":"Lockheed Atlas Ii","score":0.5882352941176471,"matchedOn":"slug","matchedValue":"lockheed-atlas-ii"}]
- **entity type**: launch_service
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **attributes**: {"merge_suggestions":"[{\"slug\":\"lockheed-atlas-ii\",\"name\":\"Lockheed Atlas Ii\",\"score\":0.5882352941176471,\"matchedOn\":\"slug\",\"matchedValue\":\"lockheed-atlas-ii\"}]"}

## Editorial
Delta 2913 was a retired three-stage member of the legacy Delta launch-vehicle family used for NASA's LAGEOS-1 mission.[^nasa-lageos-presskit][^satcat-lageos1][^nasa-lageos-2026] For that LAGEOS-1 launch, NASA listed McDonnell Douglas Corp. as the launch-vehicle contractor; the documented vehicle identity is Delta 2913 rather than a broader "Lockheed Delta" service.[^nasa-lageos-presskit][^satcat-lageos1] The variant's operating window is 1975-1976, and LAGEOS-1 launched on Delta 2913 on 1976-05-04.[^nextspaceflight-lageos1][^satcat-lageos1][^nasa-lageos-2026] For the LAGEOS-1 launch, the configuration used RS-27 first-stage propulsion, TR-201 second-stage propulsion, and a TE-364-4 solid third stage.[^nasa-lageos-presskit] The payload was NASA's laser geodynamics satellite for precision laser ranging and geodetic science, so the service is historical rather than current manifest capacity.[^nasa-lageos-2026][^ilrs-lageos1]

## Sources
- [nasa-lageos-presskit] | LAGEOS Press Kit, NASA | https://earth.gsfc.nasa.gov/sites/default/files/geo/lageos/NASA_LAGEOS_presskit_e000045273.pdf | tier=agency-doc | accessed=2026-06-16
- [nasa-lageos-2026] | LAGEOS: An Earth Science Mission Built for Enduring Precision, NASA | https://www.nasa.gov/missions/lageos/lageos-an-earth-science-mission-built-for-enduring-precision/ | tier=agency-doc | accessed=2026-06-16 | published=2026-05-04
- [ilrs-lageos1] | LAGEOS-1, International Laser Ranging Service / NASA GSFC | https://ilrs.gsfc.nasa.gov/missions/satellite_missions/current_missions/lag1_general.html | tier=agency-doc | accessed=2026-06-16
- [satcat-lageos1] | LAGEOS 1 satellite record, Satcat | https://www.satcat.com/sats/8820 | tier=community | accessed=2026-06-16
- [nextspaceflight-lageos1] | LAGEOS-1 / Delta 2913, Next Spaceflight | https://nextspaceflight.com/launches/details/6516/ | tier=community | accessed=2026-06-16

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Source: https://eo-atlas.org/launch_services/lockheed-delta
Maintainer: SpectraWorks B.V. (CC-BY 4.0)