Memorial Star Map — the Sky on a Day You Want to Remember
A star map is a quiet, non-religious way to mark a life: the real sky over a place that mattered, on a date that mattered, with a name and a line beneath it. No symbols it doesn't earn — just the stars that were actually there.
Make a memorial star map
Free, in your browser — no account, nothing uploaded. Both downloads are the complete chart: a vector SVG and a 300 dpi PNG, with nothing held back and nothing to buy.
The hardest choice with a memorial print is usually the date, and there is no correct answer — only the one that feels right to you.
Choosing the date and place
- A happy date often ages better on a wall than the date of the loss: a birthday, a wedding anniversary, a day you spent together. If the date of passing is the one you want, that is right too. You can make several and decide later — the generator is free and unlimited.
- Place carries the memory. Use the city they were from, the city they lived in, or a place you shared — a coastline, a hometown. The chart is a portrait of the sky over that spot, so choose by meaning, not by where the frame will hang.
- Time can be the evening. The evening of the chosen date gives a full night sky; exact minutes rarely matter here, because the point is the day, not a single instant.
For the caption, most people use the name as the title and one short line underneath — the years (1948 – 2025), a place, or a few words that were theirs. The tool prints only what you type; it adds no religious imagery or sentiment on its own, which is what makes it feel honest rather than generic. The ink-on-paper theme — dark marks on warm white — tends to suit a memorial better than the bright navy poster.
Printing: download the artwork and take it to any print shop or online poster service. The tool makes the file, not the paper. A modest size in a plain frame usually reads as more considered than a large glossy poster.
How the map is computed
You give it three things: a date, a time, and a place. For the place, type a town or city name and pick it from the list — 29,919 towns and cities of 18,000 people or more, from GeoNames — or enter an exact latitude and longitude instead. Accents are optional (“malmo” finds Malmö), but type the name on its own: “Roskilde Denmark” finds nothing, and a typo finds nothing rather than the wrong sky.
Your date, time and place are converted to a Julian Date and then to local sidereal time — the astronomer’s clock for “which way is the sky facing.” Each of the 1,630 stars in the Yale Bright Star Catalogue (every star brighter than magnitude 5.0, i.e. every star a good naked eye can see) is transformed to its altitude and azimuth at that exact moment, and every one of those stars above the horizon is projected onto the circular chart: zenith at the centre, horizon at the rim, north at the top — and east on the left, because a star map is read looking up, which mirrors east and west compared to a ground map.
The 89 constellation figures are drawn with the same math and clipped at the horizon. Star dots are scaled by real brightness (magnitude) and tinted by star colour. The Moon is drawn at its real altitude, azimuth and phase for your moment, and left off entirely when it was below your horizon. It does not show the planets, comets or satellites — those wander against the fixed stars and need ephemerides, which this version does not compute. Everything runs in your browser — nothing is uploaded, there is no account, and the page works offline once loaded.
Common questions
Which date should a memorial map use — a birthday or the day they died?
Many people find a birthday, a wedding anniversary, or a shared happy date gentler to live with on a wall than the date of a loss. There is no rule; choose the day you would want to look up at. You can make more than one — the tool is free and unlimited.
What place makes sense?
The city where they lived, where they were from, or a place you shared. The chart shows the stars that stood over that place on that date, so pick the location that carries the memory rather than where the frame will hang.
What can I write beneath the chart?
Usually the name as the title and one quiet line as the subtitle — the years (“1948 – 2025”), a place, or a few words that were theirs. The tool adds only the text you type; it makes no religious or sentimental claims on its own.