{"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":"2026-09-01T23:59:53.495Z","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":"ic-2629","name":"IC 2629","class":"spiral_galaxy_sa","category":"galaxy","object_type":"Spiral galaxy Sa","mag":16.2,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":687742910.4833145,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":168.15391666666665,"dec_deg":12.104944444444444,"epoch_ra_deg":168.504839,"epoch_dec_deg":11.959035,"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":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-2629","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":16.2,"h_mag":13.56,"j_mag":14.25,"k_mag":13.12,"redshift":0.04632,"hubble_type":"Sa","redshift_cmb":0.047540035925063284,"ngc_type_code":"G","uncertainties":{"distance_ly":[31260307.68626009,31260307.68626009]},"major_axis_arcmin":0.7,"minor_axis_arcmin":0.34,"position_angle_deg":28,"surface_brightness":23.84,"radial_velocity_km_s":13565},"designations":[{"catalog":"2MASX","designation":"2MASX J11123698+1206176"},{"catalog":"IC","designation":"IC 2629"},{"catalog":"SDSS","designation":"SDSS J111236.93+120617.7"},{"catalog":"SDSS","designation":"SDSS J111236.94+120617.8"}],"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."}