{"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":"2026-09-04T10:58:51.220Z","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-7811","name":"NGC 7811","class":"irregular_galaxy_i","category":"galaxy","object_type":"Irregular galaxy I","mag":14.68,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":345268764.651505,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":0.6102916666666667,"dec_deg":3.351916666666667,"epoch_ra_deg":0.954373,"epoch_dec_deg":3.501444,"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":"Pisces","discovered":"1864","featured":false,"url":"https://spacecatalog.org/object/ngc-7811","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.87,"h_mag":11.32,"j_mag":12.02,"k_mag":10.92,"v_mag":14.68,"redshift":0.025504,"hubble_type":"I","wikidata_id":"Q1169473","redshift_cmb":0.02427195603547405,"discovered_by":"Albert Marth","ngc_type_code":"G","uncertainties":{"distance_ly":[19902323.708464567,19902323.708464567]},"major_axis_arcmin":0.39,"minor_axis_arcmin":0.37,"wikipedia_article":"NGC 7811","position_angle_deg":130,"surface_brightness":21.53,"radial_velocity_km_s":7548},"designations":[{"catalog":"2MASX","designation":"2MASX J00022640+0321070"},{"catalog":"IRAS","designation":"IRAS F23598+0304"},{"catalog":"LEDA","designation":"LEDA 168"},{"catalog":"MCG","designation":"MCG +00-01-020"},{"catalog":"NGC","designation":"NGC 7811"},{"catalog":"PGC","designation":"PGC 168"}],"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."}