Born from a passion for the stars
OwnStarMap is a French company creating catalogue-based personalized star maps for meaningful moments.
OwnStarMap (Own Star Map), founded by Théo in Dives-sur-Mer in 2021.
Last updated 2026-03-23
Our story
It all started with a simple question: what did the sky look like on the day that changed everything? The day of a birth, a wedding, a meeting that transformed a life.
As a developer passionate about astronomy, I wanted to create a tool that uses public stellar catalogue data rather than a random field of decorative dots.
OwnStarMap grew from that idea: turn a selected date, local time and place into transparent, catalogue-based commemorative artwork.
Theo, Founder of OwnStarMap
Dives-sur-Mer, Normandy, France
Published astronomy method
Every map is calculated, not drawn
8,921
catalogue records
The local HYG-derived export contains 8,921 entries, including the Sun, which is left out of the rendering. This total is not the number of stars shown on each map.
88
IAU sky regions
The IAU recognizes 88 constellation regions; connecting lines are conventional artwork rather than official boundaries.
GMST
sidereal rotation
The current method uses Greenwich mean sidereal time, coordinate conversion, horizon filtering and stereographic projection.
Each OwnStarMap preview is calculated from the selected date, local time and location using fixed stellar catalogue coordinates. The current core renderer does not model solar-system objects, atmosphere, terrain or epoch corrections.
Our commitments
French company
OwnStarMap is operated by the French company ROCKETDEV in Normandy (SIRET 890 214 380). Physical orders are prepared and shipped by external partners whose location can vary.
Accuracy first
We publish the catalogue method and its limits so buyers can compare the star layer with a planetarium using the same inputs.
No surprises
Preview your map free before buying. If a product has a confirmed defect, support will correct the issue or replace it without an additional product charge when necessary.