{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.674","julian_year":2026.674,"time":"2026-09-04T06:39:17.312Z","years_from_j2000":26.674,"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-3015","name":"IC 3015","class":"spiral_galaxy_sbc","category":"galaxy","object_type":"Spiral galaxy Sbc","mag":13.15,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":110899411.40205795,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":182.25116666666668,"dec_deg":-31.51988888888889,"epoch_ra_deg":182.597736,"epoch_dec_deg":-31.669358,"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":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ic-3015","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.15,"h_mag":9.12,"j_mag":9.78,"k_mag":8.81,"redshift":0.006795,"hubble_type":"Sbc","wikidata_id":"Q3688142","redshift_cmb":0.007891857662119639,"ngc_type_code":"G","uncertainties":{"distance_ly":[14754761.75954874,14754761.75954874]},"major_axis_arcmin":0.72,"minor_axis_arcmin":0.23,"position_angle_deg":164,"surface_brightness":20.64,"radial_velocity_km_s":2030},"designations":[{"catalog":"2MASX","designation":"2MASX J12090026-3131114"},{"catalog":"ESO","designation":"ESO 441-009"},{"catalog":"ESO","designation":"ESO 441-9"},{"catalog":"ESO-LV","designation":"ESO-LV 441-0090"},{"catalog":"IC","designation":"IC 3015"},{"catalog":"IRAS","designation":"IRAS 12064-3114"},{"catalog":"LEDA","designation":"LEDA 38588"},{"catalog":"MCG","designation":"MCG -05-29-023"},{"catalog":"PGC","designation":"PGC 38588"}],"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."}