SLL.IT   Autonomous systems · payments · photometry

Operator

Simonluca Landi

Simonluca Landi.

Co-founder & CTO, CryptoRefills

I build systems that transact without a human in the loop, and I build them with an army of AI agents. Pointed at sky-survey data, the same habit turns up rotation periods for asteroids nobody had measured.

Amsterdam · Varedo (MB), Italy

Company

CryptoRefills

Digital goods bought with crypto: gift cards, mobile top-ups, travel eSIMs. Stablecoin-first checkout, 20+ assets across Ethereum, Solana, Base, Polygon, Arbitrum, Optimism and Tron. 6,600+ gift cards in catalogue.

Est. 2018 · Amsterdam

180+countries served

Agentic commerce

Protocols, in production

  • ACP
  • AP2
  • x402
  • L402
  • UCP

CryptoRefills publishes the merchant-operations layer the protocol specs skip: catalogue discovery, pricing drift, delivery semantics, refunds, fraud signals, jurisdictional metadata, multi-chain settlement. Written from what we run. Agents reach it over MCP, which carries the conversation, and pay over x402, which carries the money.

IC 405, the Flaming Star Nebula, imaged in Sloan g' and i' only. Without the hydrogen emission, what remains is blue-grey carbon dust reflecting the light of AE Aurigae.

Observatory

TESS-FFI Asteroid Rotation Catalog

141 confirmed · 67 candidate · 1 marginal

209rotation periods

  • TESS full-frame images
  • moving-target photometry
  • ALCDEF v2.3
  • sectors 22 · 72 · 91
Phase-folded light curve of asteroid 1053 Vigdis: 15,479 TESS points from three sectors scattered across two rotations, with the binned median drawn over them showing two maxima and two minima per rotation.
1053 Vigdis · folded at the adopted 3.6640 h · 15,479 TESS points from sectors 22, 72 and 91 · binned median in amber · two rotations shown

Periods derived from TESS full-frame-image moving-target photometry, targeting objects with no reliable prior determination. The catalogue publishes its rejects alongside its results, fifteen of them, with the reason each one failed. Alongside the asteroid work, variable-star photometry filed to the AAVSO International Database under observer code LSIC, including multi-band Sloan photometry of the recurrent nova T CrB. The image behind this panel is IC 405 in Sloan g′ and i′ with the hydrogen line left out, so what shows is light reflected off the dust. Narrowband has crowded that view out lately.

IC 405 · Sloan g′ + i′, no Hα · Bortle 8 backyard

Archive

Written 2012 – 2019

Eight entries, mostly a series on continuous deployment from 2012 and 2013. Kept at their original addresses.

Elsewhere

Elsewhere