spacecost 0.5.2

Data contract 1.17.1 → 1.17.2: twenty-one notes cells now say what their
sources actually hold. No value moved. Only notes cells, one code comment
and the pipeline_version stamp changed; every number in every table is the
one 0.5.0 shipped. economicspace repins to this tag only to carry the
corrected notes.

All of it comes from the General_Research evidence registry, which read the
cited documents and found the attribution, not the number, wrong. Each item
names its revision candidate.

A figure attributed to a document that does not contain it

• NASA DRA 5.0, four times (delta_v_segments.csv). The 2.65 km/s Mars
  arrival v-infinity on the MOI row (rc-017) and the 2,100 m/s LMO
  trans-Earth injection (rc-073) are two-body derivations this table already
  shows its working for; DRA carries neither, and its only TEI is 1.563 km/s
  from the 1-sol orbit. The 4,100 m/s Mars ascent (rc-074) appears nowhere in
  DRA, which sizes its ascent vehicle by mass and engines, so that row is now
  labelled an unsourced estimate. And the TMI note's "3.6-4.3 km/s" swing
  (rc-071) is DRA's Fig 4-2 read wrongly: 3.545-4.103 km/s over 2028-2046,
  departing a 407-km orbit rather than the row's 200 km. The 3,600 cell is the
  low end and stays.
• NASA SP-125 (rc-060) is an engine-design handbook with no ascent
  delta-v in it; the 9,400 m/s surface-to-LEO note now cites Curtis alone.
• arXiv:1406.5027 (rc-015) is a 13-object targeted survey with no
  population statistic, so "median NEA Δv" pointed at nothing. The 6,500 m/s
  row now cites the 6.65 km/s peak of the Benner compilation in Elvis et
  al. 2011, and says the population median runs higher (8.88 km/s, ssoBFT).
• ITU-R S.1003 (rc-079) is a disposal-orbit recommendation that never
  says "eclipse". The GEO row's 72-minute maximum now cites ECSS-E-HB-31-01
  Part 15A, and the ~45-day season is stated as geometry.
• NASA ISS Facts and Figures (rc-069) says ~90 minutes and 16 sunrises a
  day, not 92.7 min and ~36 min of shadow. Those are now attributed to orbital
  mechanics for a 400-km circular orbit, which is what the cells encode.
• The ESA Ariane 6 overview (rc-080) states payloads and no price. Both
  Ariane 6 rows now say their prices are estimates with no institutional
  source, since Arianespace publishes no list price.

A note whose own fact was off

• Launch insurance (rc-031): the 2023 rate reset followed the Viasat-3
  and Inmarsat 6-F2 losses, not Intelsat 33e (Plane Talking Q4-2023).
• RTG specific power (rc-041, rc-043): the MMRTG is 110 We at 44 kg,
  2.5 W/kg (NASA OIG IG-23-010 Table 1), in both operational_costs.csv and
  storage_systems.csv; and 1.5 kg/yr of Pu-238 is DOE's goal for 2026,
  where actual output 2018-2021 was 0.77 kg against 1.5 kg planned. The
  row's allocation-not-cost argument gets stronger.
• Electric propulsion efficiency (rc-040): Hall thrusters run ~0.51-0.69,
  the AEPS ETU-2 measurement across its throttle range. The 0.60 value and its
  0.45-0.72 band already contain it.
• Mission operations (rc-047): OSIRIS-REx operations obligated $210.0M
  over FY2017-FY2023 ($30.0M/yr) per the Planetary Society budget dataset;
  the $283M over 9 years the row was set from was the pre-return plan. 31.4 is
  within 5% of the prime-mission rate and stays.
• Nuclear thermal (rc-042): NERVA reactor tests through early 1968
  demonstrated ~800 s; 825 s was the engine rating, and the XE engine tests had
  not yet run.
• ALICE (rc-044): 210 s is near the ideal value; static motors delivered
  56-133 s, 27-64% of ideal. The row is gated out of runs either way.
• Aerobraked LEO return (rc-053): Mars Global Surveyor flew it first, and
  "~6 months" matched no campaign (Odyssey ~2.5, MRO ~5, MGS ~10).
• MARS_LANDED_MASS_FRACTION's comment (rc-039): on JPL's
  best-estimated entry masses, MSL is 28.5% and Perseverance 30.5%, not 27.6%
  and 29.8%. The constant, 0.30, is unaffected; README and CITATIONS.md quote
  the new pair.

A citation that named no document

• Space Shuttle (rc-021): "Pielke & Byerly" now names its venue, Nature
  472:38 (2011), with NASA OIG IG-24-001's ~$1.45B a launch as a cross-check.
• Drilling / excavation energy (rc-026): "Zacny et al." now names
  Metzger, Zacny & Morrison 2020 and Zeng et al. 2007.
• In-space propellant transfer loss (rc-028): the 1% low end now cites a
  ground LH2 transfer study, flagged as a preprint that assumes space-rated
  pumps.

The summary hash was re-recorded on the reference platform (Windows AMD64,
Python 3.13, numpy 2.2.6, pandas 2.3.3, AVX512 off), which reproduced the
1.17.1 hash first. A column-by-column comparison of all seven committed files
against 0.5.1 differs in notes (21 cells) and pipeline_version only.