{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:56:31.142Z","years_from_j2000":26.665,"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-1555","name":"Hind's Nebula","class":"reflection_nebula","category":"nebula","object_type":"Reflection nebula","mag":9.98,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":65.497625,"dec_deg":19.53516666666667,"epoch_ra_deg":65.889672,"epoch_dec_deg":19.598801,"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":"1852","featured":false,"url":"https://spacecatalog.org/object/ngc-1555","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":9.98,"wikidata_id":"Q835928","also_known_as":["Hind's Variable Nebula"],"discovered_by":"John Russell Hind","ngc_type_code":"RfN","major_axis_arcmin":1.82,"minor_axis_arcmin":1.35,"wikipedia_article":"NGC 1555","position_angle_deg":74},"designations":[{"catalog":"BD","designation":"BD +19 0706"},{"catalog":"Cederblad","designation":"Ced 32b"},{"catalog":"Common name","designation":"Hind's Nebula"},{"catalog":"Common name","designation":"Hind's Variable Nebula"},{"catalog":"HIP","designation":"HIP 20390"},{"catalog":"IRAS","designation":"IRAS 04190+1924"},{"catalog":"NGC","designation":"NGC 1555"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}