Manual preview · optional phone pointer
Direct the sky before you set the tripod
Enter a location and UTC time yourself, then project the horizon, celestial poles and exposure, gap and full-sequence trail arcs across your camera frame. Nothing is guessed, uploaded or saved.
This deterministic planner adds low-precision Sun, Moon and geometric twilight facts. Manual planning needs no permission. An optional consent-first phone pointer can follow your phone after you enable it: with a compass it estimates true north from the typed location and date, and it can be calibrated on Polaris, the Moon or your target. It never requests your position or the camera and does not claim AR or device support.
1 · Describe the shot
Manual plan
Inputs are ready. Generate the plan when the values match your intended shot.
2 · Inspect the projection
Camera-frame sky map
No scene yet
Optional · object URL only
Use your photo as a local backdrop
Select one JPEG, PNG, WebP or AVIF up to 32 MiB. The page gives the browser a temporary object URL only: it does not inspect EXIF, decode pixels in application code, store the file, send it, or add it to analytics. Deterministic trails remain a separate SVG layer above it.
No photo selected. The numeric plan is unchanged.
Horizon
Full sequence
One exposure
Shutter gap
Celestial pole
Sun, when above horizon and in frame
Moon, when above horizon and in frame
Optional · phone sensors, only after you ask
Phone direction and compass
Manual planning requests nothing on load; orientation code loads only after the first explicit Enable activation, permission can be requested only after a second explicit activation, denial or unavailability leaves the manual planner unchanged, and location and camera access are never requested. Hold the phone upright like a camera: the pointer follows the direction its back, the rear camera, faces. Where the phone reports a compass heading, it is turned into a true-north estimate with the WMM2025 magnetic declination for the latitude, longitude and date typed into the generated plan, never from GPS. Calibrate reads this device's date and time once, at the moment you press it, to place Polaris, the Moon or your planned target in your sky, and assumes you stand at the typed location. Sensor values, the time and the calibration stay in this page's memory: nothing is stored or sent, and Stop clears them. Low confidence is shown in words when the compass is inaccurate, disagrees with the gyroscope or jitters, or the calibration is old. This is not a camera view, AR or a device-support claim.
Off. No orientation module, sensor listener or permission request has run.
Local file · privacy projection
Share a plan without sharing where you stood
Phone handoff QR
Same manual location and UTC
Sun, Moon and twilight
—
Geometric, low-precision directions only; the Moon is placed as seen from your location (lunar parallax). Terrain and atmospheric refraction are not included.
| Twilight level | UTC-day state | Crossings |
|---|
| Frame position | Exposure | Gap | Full sequence | Curvature | Horizon |
|---|
Private full plan backup
This is not the share file above. The strict SkyPlanV1 includes the exact latitude and longitude shown in the controls. Keep it private. It includes no image or sensor data.
