Starry Memory

A personalised star map gift for Oulu

Use the free local tool

This page provides a result prefilled with the place and coordinates. The calculations and phone gyroscope work without an order; the HD poster remains optional. Explore the Oulu sky free

The exact sky of a meaningful Oulu moment, calculated before you buy

A place is not a decorative caption on a star map. For a memory in Oulu, the selected coordinates, local time and timezone determine the celestial orientation. This guide starts with a free, location-aware sky and phone gyroscope; the watermark-free HD poster is an optional keepsake after you have checked the result.

Why choose Starry Memory

  • A place-driven gift — Oulu starts at 65.0124° N, 25.4682° E; choosing a venue or address replaces that centre point before the poster is calculated.
  • GPS · IANA reference — Exact reference: North Ostrobothnia, 65.0124° N, 25.4682° E, Europe/Helsinki.
  • Free tool — The city-specific tool works free in the browser and does not create an order.
  • Transparent limits — Weather, light pollution and local obstructions are stated as limits instead of being hidden.

In Oulu, the keepsake begins with a real point on Earth before it becomes an image of the sky. Its verifiable starting point is GeoNames 643492, 65.0124° N, 25.4682° E, in timezone Europe/Helsinki.

The astronomical fingerprint of Oulu

Oulu is represented by 65.0124° N, 25.4682° E, in North Ostrobothnia, using the IANA zone Europe/Helsinki. This is a high-latitude viewpoint: the relevant celestial pole stands about 65.0° above its horizon. GeoNames record 643492 supplies the geographic reference; its population field is 216,066 and is used for catalogue selection, not presented as a live census. No source elevation is used, so a flat horizon remains the transparent default. The following pairs are approximate daylight / night duration around the 15th of each month: January: 4 h 27 / 19 h 33; February: 7 h 56 / 16 h 04; March: 11 h 11 / 12 h 49; April: 14 h 47 / 9 h 13; May: 18 h 15 / 5 h 45; June: 21 h 01 / 2 h 59; July: 19 h 42 / 4 h 18; August: 16 h 14 / 7 h 46; September: 12 h 38 / 11 h 22; October: 9 h 10 / 14 h 50; November: 5 h 35 / 18 h 25; December: 2 h 58 / 21 h 02. The longest estimated night in this model is December at 21 h 02; the shortest is June at 2 h 59. “Night” here is the complement of daylight on a flat horizon. Civil, nautical and astronomical twilight are not interchangeable, and weather is not predicted by this table.

Oulu's verifiable local record

Calculation identity: GeoNames 643492 · city Oulu · region North Ostrobothnia · country Finland · national selection rank 5 · reference population 216,066 · source elevation —. Spatial fingerprint: latitude 65.01236 · longitude 25.46816 · north hemisphere · timezone Europe/Helsinki · celestial-pole altitude 65.0°. Seasonal signature: longest night in December, 21 h 02 · shortest night in June, 2 h 59 · range 18.04 hours. Meridian star markers: Draco 90.0° * · Cepheus 85.0° * · Cassiopeia 85.0° * · Ursa Major 81.0° * · Ursa Minor 78.0° * · Perseus 70.0° *. Nearby catalogue cities: Rovaniemi 166 km · Jyväskylä 308 km · Tampere 400 km. First regional eclipse shortlist: 2027-02-20 Penumbral lunar eclipse 23:14 UTC · 2027-08-02 Total solar eclipse 10:07 UTC · 2028-01-12 Partial lunar eclipse 04:14 UTC. Together these values form the local evidence record for the “gift” page; they change with place and remain separate from real weather.

Oulu compared with nearby catalogue cities

1. Oulu → Rovaniemi: 165.6 km · Δlat +1.487° · Δlon +0.221° · Δpole +1.5° · timezone Europe/Helsinki = Europe/Helsinki · longest night December 23 h 01 | 2. Oulu → Jyväskylä: 308.4 km · Δlat -2.771° · Δlon +0.253° · Δpole -2.8° · timezone Europe/Helsinki = Europe/Helsinki · longest night December 19 h 20 | 3. Oulu → Tampere: 399.6 km · Δlat -3.513° · Δlon -1.681° · Δpole -3.5° · timezone Europe/Helsinki = Europe/Helsinki · longest night December 19 h 01. Monthly night comparison with the nearest catalogue reference — January: Oulu 19 h 33 / Rovaniemi 20 h 28 / Δ -0.91 h · February: Oulu 16 h 04 / Rovaniemi 16 h 23 / Δ -0.32 h · March: Oulu 12 h 49 / Rovaniemi 12 h 52 / Δ -0.06 h · April: Oulu 9 h 13 / Rovaniemi 9 h 01 / Δ +0.21 h · May: Oulu 5 h 45 / Rovaniemi 5 h 08 / Δ +0.61 h · June: Oulu 2 h 59 / Rovaniemi 1 h 03 / Δ +1.94 h · July: Oulu 4 h 18 / Rovaniemi 3 h 20 / Δ +0.97 h · August: Oulu 7 h 46 / Rovaniemi 7 h 25 / Δ +0.35 h · September: Oulu 11 h 22 / Rovaniemi 11 h 19 / Δ +0.04 h · October: Oulu 14 h 50 / Rovaniemi 15 h 03 / Δ -0.21 h · November: Oulu 18 h 25 / Rovaniemi 19 h 04 / Δ -0.64 h · December: Oulu 21 h 02 / Rovaniemi 23 h 01 / Δ -1.98 h. For a gift, the comparison explains why the confirmed place matters: a Oulu memory should not silently become its neighbour even when both share a timezone.

Latitude-screened constellations for Oulu

Each entry below gives an approximate maximum altitude at meridian transit and a practical season; an asterisk means circumpolar in this simplified centroid model: Draco: 90.0°, all year *; Cepheus: 85.0°, all year *; Cassiopeia: 85.0°, all year *; Ursa Major: 81.0°, all year *; Ursa Minor: 78.0°, all year *; Perseus: 70.0°, all year *; Auriga: 67.0°, all year *; Cygnus: 65.0°, all year *; Andromeda: 63.0°, all year *; Lyra: 61.0°, all year *; Boötes: 55.0°, all year *; Gemini: 47.0°, winter; Taurus: 43.0°, winter; Leo: 40.0°, spring. This is a planning guide, not a promise that every star will be visible from a bright street. Date, hour, local obstructions and light pollution still matter. The live sky tool performs the date-specific projection that a static latitude table cannot.

Eclipse dates connected to the wider Finland region

20 February 2027: Penumbral lunar eclipse, 23:14 UTC; 2 August 2027: Total solar eclipse, 10:07 UTC; 12 January 2028: Partial lunar eclipse, 04:14 UTC; 26 January 2028: Annular solar eclipse, 15:08 UTC; 6 July 2028: Partial lunar eclipse, 18:20 UTC; 31 December 2028: Total lunar eclipse, 16:53 UTC. This is deliberately a regional shortlist. Solar-eclipse paths are narrow, lunar eclipses require the Moon to be above the local horizon, and both can be lost to cloud. Open the NASA source attached to each event before planning travel or observation; never look at the Sun without certified eclipse viewers.

What the calculation does — and does not claim

Coordinates, date and local time feed the same astronomical workflow used by the poster. The HYG catalogue provides star entries, while Astronomy Engine calculates moving bodies. The page does not claim that city-centre coordinates equal a hospital, venue or home: selecting an autocomplete suggestion replaces the shortcut with that location. It also separates astronomical geometry from weather and light pollution, so a correct map never becomes a claim that the ground-level sky was cloudless.

Free gyroscope first, optional poster second

On a compatible phone, the gyroscope turns the calculated sky into a movable window: tilt and rotate to explore, with star names shown beside key points. That experience is free. If a date deserves a keepsake, the same place can continue into the editor. The protected preview remains watermarked before payment; the €3.99 purchase unlocks the 4960 × 7016 px, 300 DPI file. Physical formats appear only when availability, delivery supplement and timing can be checked for the destination. The HD file is charged once at €3.99.

Frequently asked questions

What makes a Oulu star map personal?

The confirmed date, local time and coordinates determine the map. The city shortcut is 65.0124° N, 25.4682° E, but an exact selected venue can replace it.

Can I replace the centre of Oulu with an exact address?

Yes. Choose the intended autocomplete suggestion; its coordinates replace the city shortcut. Unselected free text is never silently sent to a default city.

Is the Oulu tool free?

Yes. The local calculation, tables and gyroscope exploration can be used without payment. Only the unlocked HD poster is paid.

Does this guarantee clear-sky visibility?

No. The calculations describe geometry. Cloud, terrain, buildings and light pollution can change what a person sees from the ground.

Do I have to buy a poster?

No. The tool stands on its own. If wanted, the watermark-free 4960 × 7016 px, 300 DPI file costs €3.99. The HD file is charged once at €3.99.

Create the optional €3.99 HD poster

See also

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