{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.667","julian_year":2026.667,"time":"2026-09-01T19:08:20.125Z","years_from_j2000":26.667,"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-1515","name":"IC 1515","class":"spiral_galaxy_sb","category":"galaxy","object_type":"Spiral galaxy Sb","mag":14.4,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":299219053.98776495,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":359.0162916666667,"dec_deg":-0.9885277777777777,"epoch_ra_deg":359.360353,"epoch_dec_deg":-0.839111,"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":null,"featured":false,"url":"https://spacecatalog.org/object/ic-1515","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.41,"h_mag":10.74,"j_mag":11.41,"k_mag":10.43,"v_mag":14.4,"redshift":0.02231,"hubble_type":"Sb","wikidata_id":"Q3679154","redshift_cmb":0.021084267749205132,"ngc_type_code":"G","uncertainties":{"distance_ly":[18627530.471083503,18627530.471083503]},"major_axis_arcmin":1.31,"minor_axis_arcmin":1.08,"position_angle_deg":4,"surface_brightness":23.58,"radial_velocity_km_s":6612},"designations":[{"catalog":"2MASX","designation":"2MASX J23560391-0059182"},{"catalog":"IC","designation":"IC 1515"},{"catalog":"IRAS","designation":"IRAS F23534-0116"},{"catalog":"LEDA","designation":"LEDA 72922"},{"catalog":"MCG","designation":"MCG +00-01-004"},{"catalog":"PGC","designation":"PGC 72922"},{"catalog":"SDSS","designation":"SDSS J235603.90-005918.6"},{"catalog":"UGC","designation":"UGC 12848"}],"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."}