PyRank
brandon-rhodes

ephem

Scientific-grade astronomy routines for Python
PyPI GitHub
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

ephem has 1.9M monthly downloads and 892 GitHub stars. Version 4.2.1, first published in 2008.

It is stably maintained under a permissive license, last released in Feb 2026.

It is used by 98 tracked packages, including lunarcalendar, sqlalchemy-celery-beat and katpoint.

Downloads
Day
44.8K
Week
311.0K
Month
1.9M
Stars
892
Forks
130
Issues
3
Version
4.2.1

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
70
Popularity
62
Adoption
60
Community
50
Provenance
0
How the maintenance status was determined
Last commit
67 days ago
Monthly downloads
1,855,763
Active
Activity within 30 days
• Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
1,855,763
Stars
892
Stars per 1k downloads
0.48
Industry Standard
> 10,000,000 monthly downloads
• Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
44,424
Month daily avg
61,859
Momentum
-28.2%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
Not specified
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
• Unknown
No requires_python specified or unparseable
Package does not declare a minimum Python version.
License categories
License
MIT
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
128 days ago
Total releases
19
Releases/year
1.1
Rapid
Last release within 365 days and > 12 releases/year
• Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
33
Monthly downloads
1,855,763
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
58
 
Issue Burden
3.4
per 1k stars
Discussions
13.5
per 1k stars
Fork Ratio
25.4%
contrib / forks
Stale Release
61d
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 29.5K
Windows 717
macOS 329

Python Versions

3.12
40.9% 11.1K
3.11
28.0% 7.6K
3.10
18.1% 4.9K
3.13
7.7% 2.1K
3.14
5.3% 1.4K

Top Countries

1. US US
20.8K
2. NL NL
2.4K
3. FI FI
1.0K
4. CN CN
914
5. ES ES
914
6. DE DE
875
7. IE IE
663
8. SG SG
623
9. BR BR
430
10. IN IN
327

Package Information

License
MIT
First Release
December 13, 2008
Last Release
4 months ago
Last Commit
2 months ago
Latest Version
4.2.1
Total Releases
19
Contributors
33
Open PRs
1
Archived
No
Author
Brandon Rhodes
Python Versions
2 2.6 2.7 3 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14
Wheels
cp27 cp310 cp311 cp312 cp313 cp314 cp36 cp37 cp38 cp39
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links