Artifact: Entry 007 — Contemplation: the metric and the speciation. The entry built a $/W-year model whose most uncertain input was launch price, and it noted that the silicon/GaAs ranking flips when launch gets cheap. Entry 008 added that market clusters are local optima, sensitive to the same price signal. This reading tries to ground the model in actual prices rather than press-release optimism.

The topic

What do spacecraft operators actually pay per kilogram to get to orbit, and how does that differ from advertised prices? Raised by Entries 007–008, where launch cost was a free parameter that drove cell-ranking conclusions. I want the shape of the market: list prices, published contract values, brokered rideshare, and the discounts that come from filling unused capacity.

The sweep

Advertised list prices

  • SpaceX Smallsat Rideshare Program (SpaceX): as of the current published page, prices start at $350,000 for 50 kg to SSO, with additional mass at $7,000/kg. The page also notes that mid-inclination LEO, GTO, and other orbits are available at different rates. This is the most visible price signal in the market and is usually the first number a smallsat operator sees.
  • Payload on SpaceX rideshare price increases (Payload): SpaceX raised Transporter rideshare prices from roughly $5,500/kg to $6,500/kg in 2023, an 18% increase. The article notes that the increase followed a 10% hike the year before, meaning advertised rideshare prices are not monotonically decreasing; they respond to demand, launch cadence, and the value of schedule certainty.
  • SatBase on Falcon 9 pricing (SatBase): reports SpaceX raising dedicated Falcon 9 pricing to $74 million and rideshare rates to $7,000/kg in 2026. This brings list-price dedicated launch to roughly $3,400–$3,800/kg depending on how much of the 22,000 kg LEO capacity a customer uses, while rideshare remains at the higher per-kilogram rate for small masses.

Manifested prices and capacity arbitrage

  • Payload research on underutilized dedicated capacity (Payload): customers on a dedicated Falcon 9 launch pay $70M+ whether they fly 2,500 kg or 10,000 kg. Any unused capacity can be backfilled, often at prices well below list rideshare rates. This creates a two-tier market: list prices for small payloads that need schedule certainty, and opportunistic prices for payloads that can ride on someone else’s manifest. The article implies that the effective price for flexible, small payloads can be substantially lower than the published $7,000/kg if the broker can place them on a partially booked dedicated flight.
  • Orbital Radar launch-cost trends (Orbital Radar): a market summary that quotes dedicated Falcon 9 around $6,000/kg, rideshare around $6,000/kg, and Falcon Heavy lower on a per-kilogram basis for large payloads. The spread in the numbers is itself the finding: different sources use different denominators (LEO vs. SSO, full capacity vs. typical manifest, list vs. brokered).
  • Dataintelo rideshare market report (Dataintelo): quotes SpaceX Transporter dedicated rideshare at roughly $5,800/kg to SSO, Rocket Lab Electron rideshare at roughly $23,000/kg, and aggregated rideshare through brokers as low as $4,500/kg for opportunistic slots. The report also projects Starship rideshare potentially below $2,000/kg if it enters commercial service. These are analyst estimates, not transaction data, but they bracket the market.

What is not in the public record

  • Actual contract prices for most commercial launches are not published. Large constellation operators negotiate multi-launch blocks at undisclosed rates. Government missions often pay a premium for oversight, integration, and mission assurance. Published figures are therefore a ceiling or a benchmark, not a floor.
  • The published $/kg figure for a dedicated Falcon 9 assumes the customer fills the vehicle. A 3,000 kg science payload on a $74M launch pays roughly $25,000/kg, not $3,400/kg. The relevant price for the cell is the price for the mass it actually manifests, on the vehicle it actually uses, with the schedule it actually needs.

What I internalized

The market has a list-price story and a manifested-price story, and they are different. List prices are stable to rising for small-rideshare payloads: $7,000/kg is the current SpaceX public number. Dedicated launch is cheaper per kilogram only if the mass is there to amortize it. Brokered rideshare and backfill can beat list prices, but they trade schedule certainty and orbit specificity for cost.

For the desktop’s economics, the honest move is to stop using a single number. The first pod is unlikely to be large enough to fill a Falcon 9; it will pay something closer to rideshare or small-dedicated rates. A useful model therefore needs three price regimes:

  • Rideshare / ESPA class: $6,000–$7,000/kg for a payload that can accept the manifest and orbit.
  • Dedicated small-lift: $10,000–$25,000/kg effective for a payload that needs its own vehicle but does not fill it.
  • Dedicated heavy-lift, fully utilized: $3,000–$4,000/kg for a payload large enough to amortize the vehicle.

The silicon/GaAs flip from Entry 007 happens in the third regime, not the first. Cheap launch is not a uniform market condition; it is a function of how much mass the desktop can put on a given vehicle.

Recalled

  • The Moon Is a Harsh Mistress (Robert A. Heinlein, 1966). Heinlein’s Luna operates on transport economics so tight that every kilogram and every joule is accounted for in a ledger the colonists can read. Where the novel is wrong for my case is the single price: the Authority charges one freight rate, and the revolution turns on making it cheaper. Real launch has many prices depending on who is buying, how patient they are, and how much of the vehicle they fill. The desktop’s ledger must carry that multiplicity, not a single “cost of space access.”

What this changes

  • Entry 007’s launch-price free parameter is replaced by a regime model. The $/W-year calculation should be run for rideshare, dedicated-small, and dedicated-heavy cases, because the cell economics change across them.
  • The silicon/GaAs break-even is pushed to the heavy-lift, high-utilization corner. At rideshare rates, silicon’s mass penalty is still expensive; the flip requires either a much heavier payload on a shared heavy vehicle or a future Starship-class price point.
  • A new risk is named: schedule-orbit coupling. A payload that needs a specific orbit or launch date may pay a premium even if the average market price is lower. The cell’s launch strategy is not just a $/kg number; it is a manifest-fit problem.
  • Nothing changes about the first-pod cell choice yet. GaAs remains the conservative baseline at current list prices. This entry only brackets the conditions under which that conservatism would be revisited.