{"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":"2026-09-01T21:06:45.301Z","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-4371","name":"IC 4371","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":15.13,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":395510458.66901046,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":211.04529166666666,"dec_deg":33.307805555555554,"epoch_ra_deg":211.339841,"epoch_dec_deg":33.178751,"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":"Canes Venatici","discovered":"1896","featured":false,"url":"https://spacecatalog.org/object/ic-4371","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.13,"h_mag":11.27,"j_mag":11.91,"k_mag":10.94,"redshift":0.02705,"hubble_type":"SBa","wikidata_id":"Q2592976","redshift_cmb":0.027733291507874736,"discovered_by":"Stéphane Javelle","ngc_type_code":"G","uncertainties":{"distance_ly":[21390135.342800442,21390135.342800442]},"major_axis_arcmin":0.81,"minor_axis_arcmin":0.54,"position_angle_deg":50,"surface_brightness":23.23,"radial_velocity_km_s":8000},"designations":[{"catalog":"2MASX","designation":"2MASX J14041088+3318280"},{"catalog":"IC","designation":"IC 4371"},{"catalog":"LEDA","designation":"LEDA 50140"},{"catalog":"MCG","designation":"MCG +06-31-061"},{"catalog":"PGC","designation":"PGC 50139"},{"catalog":"PGC","designation":"PGC 50140"},{"catalog":"PGC","designation":"PGC 50159"},{"catalog":"SDSS","designation":"SDSS J140410.86+331828.0"},{"catalog":"SDSS","designation":"SDSS J140410.87+331828.0"},{"catalog":"UGC","designation":"UGC 08990 NOTES06"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}