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. See the Chula Vista constellation table
A latitude-based guide with transit altitude, season and circumpolar status
Not every constellation rises from every latitude. This guide compares the representative declination of well-known constellations with the latitude of Chula Vista. It shows which patterns can clear a practical horizon, how high they culminate and which northern or southern groups stay circumpolar.
From Chula Vista, latitude decides how high each familiar pattern can climb above an ideal horizon. Its verifiable starting point is GeoNames 5336899, 32.6401° N, 117.0842° W, in timezone America/Los_Angeles.
Each entry below gives an approximate maximum altitude at meridian transit and a practical season; an asterisk means circumpolar in this simplified centroid model: Cassiopeia: 62.6°, all year *; Draco: 57.6°, all year *; Cepheus: 52.6°, all year *; Ursa Minor: 45.6°, all year *; Boötes: 87.4°, spring; Lyra: 86.6°, summer; Andromeda: 84.6°, autumn; Cygnus: 82.6°, summer; Auriga: 80.6°, winter; Gemini: 79.4°, winter; Perseus: 77.6°, winter; Taurus: 75.4°, winter; Leo: 72.4°, spring; Ursa Major: 66.6°, 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.
Calculation identity: GeoNames 5336899 · city Chula Vista · region California · country United States · national selection rank 74 · reference population 265,757 · source elevation 21 m. Spatial fingerprint: latitude 32.64005 · longitude -117.08420 · north hemisphere · timezone America/Los_Angeles · celestial-pole altitude 32.6°. Seasonal signature: longest night in December, 14 h 08 · shortest night in June, 9 h 52 · range 4.28 hours. Meridian star markers: Cassiopeia 62.6° * · Draco 57.6° * · Cepheus 52.6° * · Ursa Minor 45.6° * · Boötes 87.4° · Lyra 86.6°. Nearby catalogue cities: San Diego 11 km · Santa Ana 143 km · Riverside 149 km. First regional eclipse shortlist: 2027-02-20 Penumbral lunar eclipse 23:14 UTC · 2027-08-17 Penumbral lunar eclipse 07:14 UTC · 2028-01-12 Partial lunar eclipse 04:14 UTC. Together these values form the local evidence record for the “constellations” page; they change with place and remain separate from real weather.
1. Chula Vista → San Diego: 11.3 km · Δlat +0.076° · Δlon -0.081° · Δpole +0.1° · timezone America/Los_Angeles = America/Los_Angeles · longest night December 14 h 08 | 2. Chula Vista → Santa Ana: 142.9 km · Δlat +1.106° · Δlon -0.784° · Δpole +1.1° · timezone America/Los_Angeles = America/Los_Angeles · longest night December 14 h 14 | 3. Chula Vista → Riverside: 148.9 km · Δlat +1.313° · Δlon -0.312° · Δpole +1.4° · timezone America/Los_Angeles = America/Los_Angeles · longest night December 14 h 15. Monthly night comparison with the nearest catalogue reference — January: Chula Vista 13 h 55 / San Diego 13 h 56 / Δ -0.01 h · February: Chula Vista 13 h 10 / San Diego 13 h 10 / Δ +0.00 h · March: Chula Vista 12 h 14 / San Diego 12 h 14 / Δ +0.00 h · April: Chula Vista 11 h 11 / San Diego 11 h 11 / Δ +0.00 h · May: Chula Vista 10 h 19 / San Diego 10 h 19 / Δ +0.00 h · June: Chula Vista 9 h 52 / San Diego 9 h 52 / Δ +0.00 h · July: Chula Vista 10 h 03 / San Diego 10 h 02 / Δ +0.01 h · August: Chula Vista 10 h 48 / San Diego 10 h 47 / Δ +0.01 h · September: Chula Vista 11 h 49 / San Diego 11 h 49 / Δ +0.00 h · October: Chula Vista 12 h 50 / San Diego 12 h 50 / Δ +0.00 h · November: Chula Vista 13 h 43 / San Diego 13 h 43 / Δ -0.01 h · December: Chula Vista 14 h 08 / San Diego 14 h 08 / Δ +0.00 h. For constellation screening, latitude difference becomes a meridian-altitude difference; a small change is reported as small rather than exaggerated for local copy.
Chula Vista is represented by 32.6401° N, 117.0842° W, in California, using the IANA zone America/Los_Angeles. This is a mid-latitude viewpoint: the relevant celestial pole stands about 32.6° above its horizon. GeoNames record 5336899 supplies the geographic reference; its population field is 265,757 and is used for catalogue selection, not presented as a live census. The source elevation is 21 metres; terrain can hide a low object even when the geometric calculation says it rises.
The following pairs are approximate daylight / night duration around the 15th of each month: January: 10 h 05 / 13 h 55; February: 10 h 50 / 13 h 10; March: 11 h 46 / 12 h 14; April: 12 h 49 / 11 h 11; May: 13 h 41 / 10 h 19; June: 14 h 08 / 9 h 52; July: 13 h 57 / 10 h 03; August: 13 h 12 / 10 h 48; September: 12 h 11 / 11 h 49; October: 11 h 10 / 12 h 50; November: 10 h 17 / 13 h 43; December: 9 h 52 / 14 h 08. The longest estimated night in this model is December at 14 h 08; the shortest is June at 9 h 52. “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.
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.
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. Checkout is in euros; the card issuer shows the current conversion to US dollars (USD).
It removes patterns that only graze an ideal horizon. 20 catalogue groups pass that screen here, but local hills and buildings can require a higher threshold.
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See the Chula Vista constellation table
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