oplanet
Lightweight Python wrapper around the NASA Exoplanet Archive and the SVO database with practical helpers for stellar aliases, photometry, and system/planet properties.
This package is built to make exoplanet metadata easier to use in notebooks and scripts by exposing a simple object API and automatically selecting the most reliable published values.
Installation
From pip (recommended)
pip install oplanet
From GitHub
pip install "git+https://github.com/ProfesseurShadoko/oplanet.git"
Quick examples
For a guided walkthrough with explanations and runnable cells, see examples.ipynb.
1. Resolve star names and aliases
from oplanet import parse_star_name, get_star_aliases
print(parse_star_name("TOI 1478"))
print(get_star_aliases("TOI 1478"))
2. Explore a system, its star, and its planets
from oplanet import NSystem
system = NSystem("LHS 1140")
print(system.star_name)
print(system.n_planets)
# Returns [value, err1, err2] when available,
# or [nan, upper_limit, lower_limit] when only limits exist
print(system.distance_pc)
print(system.star.age_myr)
print(system.b.mass_mjup)
print(system.b.orbital_period_yrs)
3. One-line import for common API
from oplanet import NSystem, get_star_aliases, get_photometry_jy, SFilter
4. Pretty-print helpers (display and print_column)
from oplanet import NSystem
system = NSystem("LHS 1140")
# Human-readable summary of system properties
system.display()
# Human-readable summary for star and a planet
system.star.display()
system.b.display()
Returned values
Most numeric property getters in the object API return a NumPy array with 3 entries:
value: best selected valueerr_pos: positive uncertaintyerr_neg: negative uncertainty
When no direct value is available and only limits are present, the returned array is:
nan, limit_upper, limit_lower
Examples:
system = NSystem("LHS 1140")
age = system.star.age_myr
distance = system.distance_pc
print(age) # e.g. [value, err_pos, err_neg] or [nan, upper, lower]
print(distance) # same convention
Data behavior
On import, the loader keeps a local CSV cache in oplanet/data, removes older archive snapshots, and refreshes stale files automatically. Filters retrieved from the SVO database are also stored locally.
Notes
- Internet access is needed for Simbad/Vizier queries and first-time archive download.
- The support for exoplanet.eu will be added once the database becomes more reliable and code friendly.
License
MIT
1 maintainer
Metadata
1 maintainer
Release files for oplanet 2.0.1
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | |
|---|---|---|---|---|
| oplanet-2.0.1.tar.gz | 38.4 kB | Without provenance | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| oplanet-2.0.1-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 78.1 kB
Release files / oplanet-2.0.1.tar.gz
| Download URL | oplanet-2.0.1.tar.gz |
|---|---|
| Size | 38.4 kB |
| Tags | Source |
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Release files / oplanet-2.0.1-py3-none-any.whl
| Download URL | oplanet-2.0.1-py3-none-any.whl |
|---|---|
| Size | 39.7 kB |
| Tags | Python 3 |
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