{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T21:18:31.490Z","years_from_j2000":26.668,"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-145","name":"NGC 145","class":"spiral_galaxy_sd","category":"galaxy","object_type":"Spiral galaxy Sd","mag":12.75,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":179490735.69853264,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":7.9405833333333335,"dec_deg":-5.152638888888889,"epoch_ra_deg":8.282905,"epoch_dec_deg":-5.004343,"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":"Cetus","discovered":"1828","featured":false,"url":"https://spacecatalog.org/object/ngc-145","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.18,"h_mag":10.57,"j_mag":11.2,"k_mag":10.32,"v_mag":12.75,"redshift":0.013875,"hubble_type":"Sd","wikidata_id":"Q907337","redshift_cmb":0.01272663059445267,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[15857864.372087946,15857864.372087946]},"major_axis_arcmin":1.76,"minor_axis_arcmin":1.43,"wikipedia_article":"NGC 145","position_angle_deg":116,"surface_brightness":22.97,"radial_velocity_km_s":4131},"designations":[{"catalog":"2MASX","designation":"2MASX J00314572-0509095"},{"catalog":"IRAS","designation":"IRAS 00292-0525"},{"catalog":"IRAS","designation":"IRAS F00292-0525"},{"catalog":"LEDA","designation":"LEDA 1941"},{"catalog":"MCG","designation":"MCG -01-02-027"},{"catalog":"NGC","designation":"NGC 145"},{"catalog":"PGC","designation":"PGC 1941"}],"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."}