Why the Place of Death Matters as Much as the Time
Half of the answer to “which star” lives in the time; the other half lives in the place. A hospital, a hometown, a city on a journey — each corresponds to a different point in the sky.
Because the zenith belongs to the observer: latitude sets its declination, and longitude together with the time sets its right ascension. Move the place by a city and the zenith moves to another point of the sky; the nearest star can change with it. The place is not supplementary detail — it is one of the two inputs.
What each coordinate does
Picture the celestial sphere as a vast dome over the Earth: where you stand decides which part of the dome you face. Latitude sets how high the zenith sits (declination equals latitude); longitude fixes where it sits east-to-west through the local sidereal time. Only together do they pin a single point onto the sky.
How much difference does a city make
At one instant, two places a few hundred kilometers apart have zeniths differing by fractions of a degree to a few degrees. Whether that changes the selected star depends on how crowded that patch of sky is: in dense fields a small shift can change the pick; in sparse ones a whole region may contain a single candidate. We do not assume “close enough” — the coordinates used are the coordinates recorded.
When the place itself is fuzzy
Places can be uncertain too: an old record says only a county, a hospital’s official name no longer exists, or a death happened while traveling, at sea, or far from home. Our approach matches the rule for time: state the uncertainty. The less precisely a place can be located, the more the page should explain what was used and how fuzzy it is — never quietly substitute a convenient coordinate.
Place is part of the memory too
For many people the place carries memory the way the hour does: which city, which room, which last journey. Making place a hard input of the calculation also makes the record more complete — the star ends up anchored to a specific coordinate instead of floating inside a vague story.
FAQ
Would an old place name and the modern city name give different results?
If they refer to the same spot, the result is identical: the calculation uses coordinates, not names. A place name only helps locate the coordinates; the name itself never enters the math.
I know only the city, not the exact address — how big is the error?
Differences within one city are usually smaller than differences between cities and rarely change the selected star. If the field is crowded, mark the place as approximate and say so on the page.