Update spacecraft database: 8,874 spacecraft

README.md

@@ -3,12 +3,7 @@ license: cc0-1.0
 pretty_name: "Spacecraft Database"
 language:
   - en
-description: >-
-  Comprehensive database of spacecraft sourced from Wikidata.
-  8,840 spacecraft including satellites, probes, and space stations,
-  with launch dates, operators, manufacturers, and orbital parameters.
-size_categories:
-  - 1K<n<10K
+description: "Comprehensive database of spacecraft sourced from Wikidata — satellites, probes, space stations, and more — spanning the entire history of the Space Age.  From the earliest Sputnik satellites to moder"
 task_categories:
   - tabular-classification
 tags:
@@ -19,59 +14,75 @@ tags:
   - open-data
   - tabular-data
   - parquet
+size_categories:
+  - 1K<n<10K
 configs:
   - config_name: default
-    default: true
     data_files:
       - split: train
         path: data/spacecraft.parquet
+    default: true
 ---
 
 # Spacecraft Database
 
-*Part of the [Orbital Mechanics Datasets](https://huggingface.co/collections/juliensimon/orbital-mechanics-datasets-69c24caca4ab3934c9856994) collection on Hugging Face.*
 
-Comprehensive database of **8,840** spacecraft — satellites, probes, space stations, and more — sourced from [Wikidata](https://www.wikidata.org/).
+<div align="center">
+  <img src="banner.jpg" alt="Voyager spacecraft artist concept" width="400">
+  <p><em>Credit: NASA/JPL-Caltech</em></p>
+</div>
+
+
+*Part of a [dataset collection](https://huggingface.co/collections/juliensimon/orbital-mechanics-datasets-69c24caca4ab3934c9856994) on Hugging Face.*
 
 ## Dataset description
 
-From the earliest Sputnik satellites to modern mega-constellations and deep space probes, this dataset catalogs spacecraft across the entire history of the Space Age. Each record includes launch and decommission dates, operating agency, manufacturer, orbital regime, mass, and associated mission where available.
+Comprehensive database of spacecraft sourced from Wikidata — satellites, probes, space stations, and more — spanning the entire history of the Space Age.
+
+From the earliest Sputnik satellites to modern mega-constellations and deep space probes, this dataset catalogs spacecraft across seven decades of spaceflight. Each record includes launch and decommission dates, operating agency, manufacturer, orbital regime, mass, and associated mission where available.
 
 The dataset draws on Wikidata's structured knowledge base using the spacecraft class (Q40218) and all its subclasses. It is maintained by the WikiProject Spaceflight community and updated as new spacecraft are launched and documented.
 
-Records span from **1957-10-04** to **2039-01-01**, with **7,373** spacecraft having a known launch date and **1,799** with a recorded mass.
+
+This dataset is suitable for **tabular classification** tasks.
 
 ## Schema
 
-| Column | Type | Description |
-|--------|------|-------------|
-| `wikidata_id` | string | Wikidata entity ID (e.g. Q48371) |
-| `name` | string | Spacecraft name |
-| `launch_date` | string | Launch date (YYYY-MM-DD) |
-| `decommissioned_date` | string | Decommissioning date (YYYY-MM-DD) |
-| `operator` | string | Operating agency or organization |
-| `manufacturer` | string | Manufacturer name |
-| `orbit_type` | string | Orbital regime (e.g. LEO, GEO, heliocentric) |
-| `mass_kg` | float | Spacecraft mass in kilograms |
-| `mission` | string | Associated mission name |
-| `launch_year` | int | Launch year (derived from launch_date) |
+| Column | Type | Description | Sample | Null % |
+|--------|------|-------------|--------|--------|
+| `wikidata_id` | str | Wikidata entity ID (e.g. 'Q48371'); stable URI used for cross-referencing enrichment sources | Q80811 | 0.0% |
+| `name` | string | Spacecraft name as recorded in Wikidata (e.g. 'Hubble Space Telescope', 'Sputnik 1', 'Starlink-1234') | Sputnik 1 | 0.0% |
+| `launch_date` | str | ISO 8601 UTC launch date in YYYY-MM-DD format; null if the spacecraft has not yet launched or date is unknown | 1957-10-04 | 16.1% |
+| `operator` | string | Agency or organization operating the spacecraft (e.g. 'NASA', 'ESA', 'SpaceX', 'Roscosmos'); null if not recorded in Wikidata | Soviet Union | 68.8% |
+| `manufacturer` | string | Organization that built the spacecraft bus (e.g. 'Boeing', 'Lockheed Martin', 'Airbus'); null if not recorded | S.P. Korolev Rocket and Space Corpora... | 73.3% |
+| `orbit_type` | string | Orbital regime (e.g. 'LEO', 'GEO', 'heliocentric', 'lunar orbit', 'deep space'); null if orbital data not available in Wikidata | low Earth orbit | 82.8% |
+| `mass_kg` | Float64 | Total spacecraft mass in kilograms at launch; null for ~90% of entries where Wikidata has no mass recorded | 83.6 | 79.6% |
+| `mission` | string | Associated mission name linked in Wikidata (e.g. 'Apollo program', 'Mars Science Laboratory'); null if no mission link recorded | Sputnik programme | 80.1% |
+| `launch_year` | float64 | Year of launch derived from launch_date; null if launch_date is null; useful for time-series aggregation | 1957.0 | 16.1% |
 
 ## Quick stats
 
-- **8,840** total spacecraft in the database
-- **7,373** spacecraft with a known launch date
-- **1,799** spacecraft with a recorded mass
-- **462** distinct operators
-- **27** distinct orbital regimes
+- **8,874** total spacecraft in the database
+- **7,444** spacecraft with a known launch date
+- **1,812** spacecraft with a recorded mass
+- **463** distinct operators
+- **26** distinct orbital regimes
 - Date range: 1957-10-04 to 2039-01-01
-- Top operators: National Aeronautics and Space Administration (281), United States Air Force (155), Roscosmos State Corporation (126), Indian Space Research Organisation (115), European Space Agency (92)
-- Top orbital regimes: geostationary orbit (597), low Earth orbit (395), Sun-synchronous orbit (242), medium Earth orbit (69), geosynchronous orbit (35)
+- Top operators: National Aeronautics and Space Administration (301), United States Air Force (158), Roscosmos State Corporation (128), Indian Space Research Organisation (112), European Space Agency (89)
+- Top orbital regimes: geostationary orbit (598), low Earth orbit (401), Sun-synchronous orbit (255), medium Earth orbit (70), geosynchronous orbit (35)
 
 ## Usage
 
 ```python
 from datasets import load_dataset
 
+ds = load_dataset("juliensimon/spacecraft-database", split="train")
+df = ds.to_pandas()
+```
+
+```python
+from datasets import load_dataset
+
 ds = load_dataset("juliensimon/spacecraft-database", split="train")
 df = ds.to_pandas()
 
@@ -81,55 +92,50 @@ print(df["operator"].value_counts().head(10))
 # Spacecraft by orbital regime
 print(df["orbit_type"].value_counts().head(10))
 
-# Spacecraft launched per year
-print(df["launch_year"].value_counts().sort_index())
+# Launches per year
+import matplotlib.pyplot as plt
+df["launch_year"].dropna().astype(int).value_counts().sort_index().plot(kind="bar", figsize=(14, 4))
+plt.xlabel("Year")
+plt.ylabel("Spacecraft Launched")
+plt.title("Spacecraft Launches Per Year")
+plt.tight_layout()
+plt.show()
 
 # Heaviest spacecraft
 heaviest = df.nlargest(10, "mass_kg")[["name", "operator", "mass_kg", "orbit_type"]]
 print(heaviest)
-
-# Still operational (no decommission date)
-operational = df[df["decommissioned_date"].isna() & df["launch_date"].notna()]
-print(f"{len(operational):,} spacecraft with no recorded decommission date")
 ```
 
 ## Data source
 
-[Wikidata](https://www.wikidata.org/) SPARQL endpoint. Spacecraft identified via
-property P31 (instance of) = Q40218 (spacecraft) and all subclasses via P279*.
-Data is community-curated by [WikiProject Spaceflight](https://www.wikidata.org/wiki/Wikidata:WikiProject_Spaceflight).
-
-## Update schedule
-
-Quarterly (January, April, July, October).
+https://www.wikidata.org/
 
 ## Related datasets
 
-- [space-missions](https://huggingface.co/datasets/juliensimon/space-missions) -- Space missions database
-- [satcat](https://huggingface.co/datasets/juliensimon/satcat) -- Satellite catalog (SATCAT)
-- [launch-vehicles](https://huggingface.co/datasets/juliensimon/launch-vehicles) -- Launch vehicle catalog
+- [juliensimon/space-missions](https://huggingface.co/datasets/juliensimon/space-missions)
+
+- [juliensimon/space-track-satcat](https://huggingface.co/datasets/juliensimon/space-track-satcat)
 
-## Pipeline
+- [juliensimon/launch-vehicles](https://huggingface.co/datasets/juliensimon/launch-vehicles)
 
-Source code: [juliensimon/space-datasets](https://github.com/juliensimon/space-datasets)
+> If you find this dataset useful, please consider [giving it a like](https://huggingface.co/datasets/juliensimon/spacecraft-database) on Hugging Face. It helps others discover it.
 
-## Support
+## About the author
 
-If you find this dataset useful, please give it a ❤️ on the [dataset page](https://huggingface.co/datasets/juliensimon/spacecraft-database) and share feedback in the Community tab! Also consider giving a ⭐️ to the [space-datasets](https://github.com/juliensimon/space-datasets) repo.
+Created by [Julien Simon](https://julien.org) — AI Operating Partner at Fortino Capital. Part of the [Space Datasets](https://julien.org/datasets) collection.
 
 ## Citation
 
 ```bibtex
 @dataset{spacecraft_database,
-  author = {Simon, Julien},
   title = {Spacecraft Database},
+  author = {juliensimon},
   year = {2026},
-  publisher = {Hugging Face},
   url = {https://huggingface.co/datasets/juliensimon/spacecraft-database},
-  note = {Sourced from Wikidata (CC0)}
+  publisher = {Hugging Face}
 }
 ```
 
 ## License
 
-[CC0-1.0](https://creativecommons.org/publicdomain/zero/1.0/) (Wikidata content is public domain)
+[CC0-1.0](https://creativecommons.org/licenses/by/4.0/)

data/spacecraft.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
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-size 172256
+oid sha256:4c5c02ce21b8079990a1a4338629ffd23aa54328956171e739b592214f4e38ac
+size 172235