{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-02T22:53:51.922Z","years_from_j2000":26.671,"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":"ngc-6345","name":"NGC 6345","class":"barred_spiral_galaxy_sba","category":"galaxy","object_type":"Barred spiral galaxy SBa","mag":15.12,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":490761844.59696764,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":258.85116666666664,"dec_deg":57.35030555555556,"epoch_ra_deg":258.967087,"epoch_dec_deg":57.319293,"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":"Draco","discovered":"1887","featured":false,"url":"https://spacecatalog.org/object/ngc-6345","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.12,"h_mag":11.2,"j_mag":11.88,"k_mag":10.9,"redshift":0.03439,"hubble_type":"SBa","wikidata_id":"Q1145223","redshift_cmb":0.03424925917027055,"discovered_by":"Lewis A. Swift","ngc_type_code":"G","uncertainties":{"distance_ly":[24423111.759357978,24423111.759357978]},"major_axis_arcmin":0.95,"minor_axis_arcmin":0.39,"position_angle_deg":35,"surface_brightness":23.32,"radial_velocity_km_s":10133},"designations":[{"catalog":"2MASX","designation":"2MASX J17152430+5721015"},{"catalog":"LEDA","designation":"LEDA 59945"},{"catalog":"MCG","designation":"MCG +10-24-115"},{"catalog":"NGC","designation":"NGC 6345"},{"catalog":"PGC","designation":"PGC 59945"},{"catalog":"SDSS","designation":"SDSS J171524.26+572101.3"},{"catalog":"SDSS","designation":"SDSS J171524.27+572101.0"},{"catalog":"SDSS","designation":"SDSS J171524.28+572101.0"},{"catalog":"SDSS","designation":"SDSS J171524.28+572101.1"}],"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."}