{"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":"2026-09-04T17:01:25.054Z","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-2775","name":"NGC 2775","class":"spiral_galaxy_sab","category":"galaxy","object_type":"Spiral galaxy Sab","mag":10.24,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":77825298.69432892,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":137.58383333333333,"dec_deg":7.037944444444444,"epoch_ra_deg":137.940461,"epoch_dec_deg":6.928787,"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":"Cancer","discovered":"1783","featured":false,"url":"https://spacecatalog.org/object/ngc-2775","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.14,"h_mag":7.41,"j_mag":7.92,"k_mag":7.04,"v_mag":10.24,"redshift":0.004513,"hubble_type":"Sab","wikidata_id":"Q249820","redshift_cmb":0.005548047834535552,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14383093.000676084,14383093.000676084]},"major_axis_arcmin":4.25,"minor_axis_arcmin":3.36,"wikipedia_article":"NGC 2775","position_angle_deg":159,"surface_brightness":22.88,"radial_velocity_km_s":1350},"designations":[{"catalog":"2MASX","designation":"2MASX J09102011+0702165"},{"catalog":"Caldwell","designation":"C 48"},{"catalog":"IRAS","designation":"IRAS 09076+0714"},{"catalog":"IRAS","designation":"IRAS F09076+0714"},{"catalog":"LEDA","designation":"LEDA 25861"},{"catalog":"MCG","designation":"MCG +01-24-005"},{"catalog":"NGC","designation":"NGC 2775"},{"catalog":"PGC","designation":"PGC 25861"},{"catalog":"SDSS","designation":"SDSS J091020.13+070216.8"},{"catalog":"UGC","designation":"UGC 4820"}],"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."}