{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T04:17:07.487Z","years_from_j2000":26.669,"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-772","name":"NGC 772","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":10.3,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":103976842.1518776,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":29.831583333333334,"dec_deg":19.007527777777778,"epoch_ra_deg":30.200745,"epoch_dec_deg":19.138106,"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":"Aries","discovered":"1785","featured":false,"url":"https://spacecatalog.org/object/ngc-772","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.71,"h_mag":7.44,"j_mag":8.17,"k_mag":7.2,"v_mag":10.3,"redshift":0.00832,"hubble_type":"Sb","wikidata_id":"Q747344","redshift_cmb":0.007401968250112967,"also_known_as":["Fiddlehead Galaxy"],"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14667743.272785384,14667743.272785384]},"major_axis_arcmin":4.57,"minor_axis_arcmin":2.52,"wikipedia_article":"NGC 772","position_angle_deg":131,"surface_brightness":22.32,"radial_velocity_km_s":2483},"designations":[{"catalog":"2MASX","designation":"2MASX J01591958+1900271"},{"catalog":"IRAS","designation":"IRAS 01565+1845"},{"catalog":"IRAS","designation":"IRAS F01565+1845"},{"catalog":"LEDA","designation":"LEDA 7525"},{"catalog":"MCG","designation":"MCG +03-06-011"},{"catalog":"NGC","designation":"NGC 772"},{"catalog":"PGC","designation":"PGC 7525"},{"catalog":"SDSS","designation":"SDSS J015919.55+190027.5"},{"catalog":"UGC","designation":"UGC 1466"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}