Sideris vs Deep Sky Scanner

Point your camera at the night sky and know exactly what you captured. Sideris is a plate-solving companion and interactive star map built for astrophotographers with simple gear: a camera, a lens, and a star tracker. No go-to mount required. Take a photo of the sky and Sideris solves it: it identifies the exact patch of sky in the frame and reports where the camera is pointing, in real celestial coordinates. The photograph is then overlaid on the star map, at the right angle and the right size, among the stars and deep-sky objects that surround it. STAR MAP AND PLATE SOLVING - Interactive star map: pan and zoom across a live map of stars, planets, and the Moon. - Messier catalog: all 110 Messier objects, each with a real NASA and ESA photograph and an altitude curve showing when it climbs highest and when the sky is dark enough to shoot it. - Plate solving: identify any night-sky photo and get its true celestial coordinates. - Photo on the sky map: the solved picture appears exactly where it points, with the surrounding sky in view. - Distance to target: pick the object you were aiming for and see how far the center of the frame sits from it. TOOLS FOR THE FIELD - Polar alignment scope: a built-in reticle for aligning your star tracker. - Night mode: a red-light theme that turns on automatically after dark and preserves night vision. - White screen: a dimmable white panel for shooting flat frames. - Moon phase calendar: phases, illumination and moonrise times for any night, whether the Moon is the problem or the subject. NO TELESCOPE REQUIRED Solving works fully offline. No signal needed at your dark site. Sideris is built for the DSLR and tracker setup that most beginning and traveling astrophotographers use, without a go-to mount or an observatory. TRY IT FREE Start with free plate solves to try it out. When you are ready for more, unlock unlimited solving with a single one-time purchase. No subscription, ever. Clear skies.

Point your phone at the sky and know instantly what’s worth imaging. Deep Sky Scanner turns your device into an aiming tool for the Seestar S50, scanning your field of view and ranking every galaxy, cluster, and nebula by altitude, brightness, and how well it’ll actually fit your frame. No more guessing what’s up, no star-hopping, no wasted setup time on a target that’s too big or too faint for tonight’s sky. FEATURES • Live sky scan — see every object in view as you move your phone, tracked with full 3D orientation for steady accuracy even near the zenith • Ranked target lists — sorted by altitude trajectory, brightness, or best overall fit for your Seestar S50 • Frame-fit scoring — know before you start whether an object will actually fit the frame, not spill past the edges • Ascending/descending badges — see whether a target is climbing toward better altitude or already past its peak • Planning mode — drag the time slider to preview the sky at any hour and plan your session in advance • Per-object imaging notes — integration-time guidance by magnitude, edge-on galaxy detection, and nearby-companion flags • Full OpenNGC catalog with offline fallback — works even without a signal • Additional catalogs are available and can be optionally selected on the settings page • Supports the Seestar family of telescopes Built by a Seestar owner, for Seestar owners.