Soranagi

Plan Milky Way views and Sun/Moon alignments with your place, time and gear. YOUR CAMERA, YOUR FRAME Use Sony, Canon, Nikon or OM SYSTEM presets, or enter sensor size and actual focal length. Try 14/24/35 mm, wide-to-telephoto views, portrait orientation and supported converters. Compare gear A/B at one place/time/aim; share it with sky, full-screen, AR and planner views. The 15 mm diagonal fisheye preview is approximate. STAR MOTION AND FOREGROUND FOCUS For a fixed tripod without tracking, choose pixel or sensor-mm motion limits across the frame or its central region. Estimate shutter times from recorded image dimensions or megapixels. Enter working aperture, foreground distance and a blur circle for thin-lens infinity, hyperfocal or manual-focus guidance. PANORAMAS AND SCOUTING PHOTOS Plan one rectilinear panorama row: azimuth, elevation, sweep, shared spherical area and exposure/setup/rest times. Inspect directions, timing, sampled centerline gaps and twilight. Stitch with your own software. Overlay future sky positions on a photo from the same viewpoint. Manually set its original FOV, direction, roll and crop; move time with a slider. HEIC/HEIF support depends on the device decoder, without external conversion. Photos/calibration stay local; undisplayable saved originals remain. COMPARE PLACES AND FIND AN ARCH Compare three candidates at one UTC instant or their selected local nights. Inspect Moon, darkness, Galactic Center and terrain. Search sampled arch times by centerline height, direction and Moon criteria. Darkness information works where the Galactic Center never rises. SUN, MOON AND BACKGROUND TERRAIN Search alignments using subject dimensions or a summit point, from a fixed viewpoint or within 20 km of a subject. Check selected candidates against coarse terrain out to 100 km, including mountains beyond the subject. Inspect partial/whole-disc exposure, changes within ±30 minutes and 0.1–20 m viewpoint shifts. Conservative bands show user-assumed position/height/width errors, not measured GPS accuracy or guaranteed shooting times. Check access and footing on site. OFFICIAL WEATHER AND AURORA Manually load NOAA Kp/short-range OVATION, ECCC nearby-city reports or JMA regional forecasts. Retain original English/French or Japanese text, region/city, issue/target times and missing/stale labels. Japan offers automatic region lookup or manual selection. Automatic lookup stops near map boundaries; manual viewpoint membership is unverified. These are regional references. Out-of-period selected times remain unknown: current reports are not forecasts for later travel dates. NOAA colors are model values, not local visibility probabilities or shooting-success forecasts. TAKE YOUR PLAN WITH YOU Keep sky charts, AR, sunrise/sunset, lunar phase, twilight and existing Milky Way tools. Japan, Banff/Lake Louise and Yellowknife terrain and bilingual guides are bundled. Calculations and local records work offline; Web users explicitly save terrain regions and test offline before travel. Save plans, notes and photos; export JSON backups/calendar events and schedule local iOS reminders. The online guide is free. Version/content IDs distinguish loaded, published Web and offline information, including manual-only updates; no automatic update or full-file verification. No automatic cloud sync. Weather/maps need connectivity: ECCC receives a coordinate-derived search area, JMA receives region codes, and external maps receive chosen coordinates. Photos are not sent to weather services. Finite samples and idealized optics/terrain cannot guarantee pinpoint stars, every alignment or visibility. Brightness, lens rendering, nearby trees/buildings and clouds are not simulated. Fisheye excludes motion/focus/panorama calculations. No automatic photo calibration, occlusion, stitching or camera control. Never view the Sun directly. Use a purpose-built solar filter over the lens front and follow the manufacturer's instructions.