{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T13:02:04.704Z","years_from_j2000":26.675,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, and the result is referred to the true equator and equinox of this instant. Those are separate things: the motion moves the object, and the rotation turns the grid under it by about fifty arcseconds a year, with nutation adding up to another seventeen.","excluded":"Parallax, the radial-velocity perspective term, aberration and refraction; each is below the accuracy of the catalogued positions themselves. An object with no published proper motion comes back where the catalogue has it rather than at a fabricated zero, and says so with a null pm_ra_mas_yr. A body with no fixed position is not propagated at all — its place comes from an ephemeris, which is what /api/v1/visible answers with."},"slug":"ngc-1554","name":"NGC 1554","class":"star","category":"star","object_type":"Star","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":65.43145833333334,"dec_deg":19.52058333333333,"epoch_ra_deg":65.82359,"epoch_dec_deg":19.584368,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":"1868","featured":false,"url":"https://spacecatalog.org/object/ngc-1554","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"h_mag":9.58,"j_mag":10.51,"k_mag":9.27,"wikidata_id":"Q1044002","discovered_by":"Otto Struve","ngc_type_code":"*","wikipedia_article":"NGC 1554"},"designations":[{"catalog":"2MASS","designation":"2MASS J04214353+1931144"},{"catalog":"Cederblad","designation":"Ced 32"},{"catalog":"Lynds","designation":"LBN 176.18-20.82"},{"catalog":"Lynds","designation":"LBN 817"},{"catalog":"NGC","designation":"NGC 1554"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}