{"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":"2026-09-01T23:30:02.169Z","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-949","name":"IC 949","class":"spiral_galaxy_sd","category":"galaxy","object_type":"Spiral galaxy Sd","mag":15.24,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":409051022.0010595,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":208.06983333333332,"dec_deg":22.521583333333332,"epoch_ra_deg":208.385452,"epoch_dec_deg":22.388799,"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":"Boötes","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-949","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.24,"h_mag":11.21,"j_mag":11.98,"k_mag":10.88,"redshift":0.027833,"hubble_type":"Sd","wikidata_id":"Q3711180","redshift_cmb":0.028663239431983678,"ngc_type_code":"G","uncertainties":{"distance_ly":[21805871.246893626,21805871.246893626]},"major_axis_arcmin":1.27,"minor_axis_arcmin":0.44,"position_angle_deg":137,"surface_brightness":23.49,"radial_velocity_km_s":8228},"designations":[{"catalog":"2MASX","designation":"2MASX J13521678+2231171"},{"catalog":"IC","designation":"IC 949"},{"catalog":"IRAS","designation":"IRAS 13499+2246"},{"catalog":"IRAS","designation":"IRAS F13499+2245"},{"catalog":"LEDA","designation":"LEDA 49265"},{"catalog":"MCG","designation":"MCG +04-33-015"},{"catalog":"PGC","designation":"PGC 49265"},{"catalog":"SDSS","designation":"SDSS J135216.76+223117.6"},{"catalog":"SDSS","designation":"SDSS J135216.76+223117.7"},{"catalog":"UGC","designation":"UGC 8777"}],"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."}