# Pixxel Firefly-4
*missions*

## Specifications
- **operator**: pixxel
- **platform**: pixxel-firefly-bus
- **actual launch**: "2025-08-26T00:00:00.000Z"
- **current status**: operational
- **orbit type**: Sun-synchronous, approximately 550 km, 97.65 degree inclination, 10:00-11:00 local solar time equator crossing
- **revisit days**: 17
- **tasking supported**: 1
- **last verified date**: 2026-05-24
- **verified by**: sw
- **claim status**: unclaimed

## Editorial
Pixxel Firefly-4 (FFLY-4) is the first satellite in the second launch batch of Pixxel's Firefly Phase 1 hyperspectral constellation. It was launched on 26 August 2025 alongside Firefly-5 and Firefly-6 aboard a SpaceX Falcon 9 (NAOS mission) from Vandenberg SFB.[^pixxel-launch2] The satellite operates in a Sun-synchronous orbit at approximately 550 km altitude, 97.65-degree inclination, with a 10:00-11:00 AM local solar time equator crossing.[^pixxel-firefly-page]

The Firefly hyperspectral imager covers a spectral range cited as 450-900 nm by the operator[^pixxel-firefly-page] and 470-850 nm by eoPortal[^eoportal-pixxel]; the operator-published figure is used here. Spatial resolution is 5 m, swath width 40 km, and single-satellite revisit is 17 days, consistent with the batch-1 specification per the operator press release.[^pixxel-launch2][^pixxel-firefly-page] With all six Phase 1 satellites operational, the constellation achieves approximately 24-hour global revisit.[^pixxel-firefly-page]

Firefly-4 has a mass of approximately 60 kg and is built on Pixxel's proprietary Firefly Bus. Orbital phasing configuration of the batch-2 satellites relative to batch-1 to achieve the full-constellation revisit cadence had not been publicly confirmed as of the research date (2026-05-24).[^pixxel-launch2] No per-satellite capability or orbital differences within the batch-2 group have been reported.

| Methodology | Evidence class | Source |
|---|---|---|
| Hyperspectral imaging | Demonstrated (in-orbit) | Pixxel batch-2 launch announcement[^pixxel-launch2] |

## Compositional position
- Pixxel Firefly-4 --[mission_payloads]--> pixxel-firefly-imager (products)
- Pixxel Firefly-4 --[mission_buses]--> pixxel-firefly-bus (products)
- Pixxel Firefly-4 --[data_products_from_missions]--> pixxel-firefly-imagery (data_products)
- Pixxel Firefly-4 --[brand-grouping]--> pixxel-firefly-5 (missions)
- pixxel-firefly-3 (missions) --[brand-grouping]--> Pixxel Firefly-4

---
Source: https://eo-atlas.org/missions/pixxel-firefly-4
Maintainer: SpectraWorks B.V. (CC-BY 4.0)