The International Meteor Organization (IMO) publishes an annual shower calendar with peak dates, ZHR, radiant coordinates, and activity period. The American Meteor Society (AMS) and IAU Meteor Data Center provide complementary data. Most sites combine IMO base data with editorial viewing notes per shower in a sheet.

As a second page group: /meteor-showers/{shower}/{city}/. The source joins the shower row with a city list, computing local radiant rise time and dark-sky window per city. This page group catches the high-volume 'Perseids viewing Chicago' style queries that a single shower page can't rank for.

ZHR is a technical metric (theoretical rate at the zenith under ideal conditions); most visitors search for 'how many will I see'. The base page can render the ZHR badge alongside a 'realistic rate' computation that accounts for radiant elevation and visitor sky brightness. Both numbers serve different audiences.

Major showers vary year to year based on moon phase at peak. Add a year-keyed activity field (forecast2026, forecast2027) carrying the moon-phase note and adjusted recommendation. Editors update one cell per year and the page rerenders on next cache refresh. Forecast notes often link to a moonrise reference page group.

Yes. Add an outburstHistory column listing years of notable outbursts (Leonids 1833, 1966, 2001; Draconids 1933, 1946, 2011). A list mapping renders the history as repeated items with year, ZHR, and notes. Outburst forecasting is genuinely valuable editorial content that pays off in evergreen traffic.

The IMO calendar lists dozens of minor showers (Eta Aquariids, Delta Aquariids, Lyrids, Ursids, etc.) alongside the major five. The same template handles them. Many sites omit very minor showers to avoid diluting authority across thin pages, keeping only IMO 'established' designations.

Event schema with eventSchedule covering the peak night window, location (worldwide or hemisphere-specific), and image (a radiant chart or a peak-night sky map). The event-series pattern with annual recurrence (subEvent of the parent shower series) is valid and helps SERP enhancement.

Yes. SleekRank registers every generated URL with the sitemap and noindexes the base template page. The shower roster is stable year-over-year so URLs are persistent. For per-city sub-pages, the sitemap grows linearly with city count, which is the desired outcome.