Science Centre Observatory, Jurong · session Fri 7:30–10:00 pm
Countdown to chosen time—
🗺️ Sky map — looking up · N top, E left
Gold = Moon · ☀ = Sun · dots = planets · cyan squares = deep-sky. Hover a marker for its name. Hover the map (or click) to reveal constellation lines & names — then click a gold name for its myth & 3D depth view.
🏙️ Sky brightness — trims deep-sky verdicts to what a city sky really shows
✨ Double & carbon stars — moon-proof showpieces
Tight star pairs and vivid red carbon stars punch straight through moonlight and Jurong's light pollution — ideal when the faint fuzzies are washed out. Best in the 40 cm and 6" apo at high power.
📅 Conjunctions & special events — next 3 weeks from the chosen date
🛰️ Satellite passes — ISS · Tiangong · Hubble · 7–11 pm on the chosen night
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📋 Session run-sheet — suggested per-instrument plan
Gold = Moon · ☀ = Sun · dots = planets · cyan squares = deep-sky. Tap a marker for its name. Tap the map to reveal constellation lines & names — then tap a gold name for its myth & 3D depth view.
🔭 Best deep-sky targets
🏙️ Sky brightness — trims deep-sky verdicts to what a city sky really shows
✨ Double & carbon stars — moon-proof
Star pairs and red carbon stars punch through moonlight and light pollution — ideal when faint fuzzies are washed out.
Main dome: 40 cm (16") Cassegrain + 15 cm (6") apo. 2nd dome: 11" + 7". Deck: Celestron CPC (8"–11", GoTo) + C6 (6"). Your Seestar S30 Pro: 30 mm f/5, dual-band Hα/OIII filter, EQ mode — 2 h of 30 s subs. Globulars/doubles → 40 cm + 6" apo · Moon & planets → CPC/C6 · emission nebulae → Seestar dual-band even under Moon.
Tip: add this page to your home screen (Share → Add to Home Screen) to open it like an app. Pick any date & time to plan — everything is computed on-device and works offline.
Moon, planet positions & target altitudes computed on your phone for the date & time you pick. Weather notes are seasonal guidance — use the Nowcast for the live call.
Sources: deep-sky catalogue — AstroPixels Messier & Caldwell catalogs (F. Espenak) · planetary elements — P. Schlyter · weather — MSS Weather.gov.sg & Open-Meteo · seeing/transparency — 7Timer! · light-pollution realism — Bortle scale · haze — NEA via data.gov.sg · sky events — Sea & Sky astronomy calendar · ISS/Tiangong/Hubble orbits — CelesTrak TLEs via satellite.js · Jupiter/Saturn detail — J. Meeus series, GRS longitude per JUPOS trend · rain radar — MSS · SCOB.
▶ Live session mode
📣 Tonight in one line
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