{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T22:30:13.890Z","years_from_j2000":26.654,"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-3115","name":"Spindle Galaxy","class":"elliptical_galaxy_e_s0","category":"galaxy","object_type":"Elliptical galaxy E-S0","mag":9.09,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":47718750.70114153,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":151.30825,"dec_deg":-7.718583333333333,"epoch_ra_deg":151.642163,"epoch_dec_deg":-7.848782,"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":"Sextans","discovered":"1787","featured":false,"url":"https://spacecatalog.org/object/ngc-3115","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.08,"h_mag":6.12,"j_mag":6.79,"k_mag":5.88,"v_mag":9.09,"redshift":0.002222,"hubble_type":"E-S0","wikidata_id":"Q671468","redshift_cmb":0.0034073250222548257,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14145683.6226121,14145683.6226121]},"major_axis_arcmin":7.1,"minor_axis_arcmin":3.01,"wikipedia_article":"NGC 3115","position_angle_deg":43,"surface_brightness":23.02,"radial_velocity_km_s":665},"designations":[{"catalog":"2MASX","designation":"2MASX J10051397-0743068"},{"catalog":"Caldwell","designation":"C 53"},{"catalog":"Common name","designation":"Spindle Galaxy"},{"catalog":"LEDA","designation":"LEDA 29265"},{"catalog":"MCG","designation":"MCG -01-26-018"},{"catalog":"NGC","designation":"NGC 3115"},{"catalog":"PGC","designation":"PGC 29265"},{"catalog":"UGCA","designation":"UGCA 199"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T19:16:43.430Z","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."}