{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T15:55:42.466Z","years_from_j2000":26.678,"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-7123","name":"NGC 7123","class":"spiral_galaxy_sa","category":"galaxy","object_type":"Spiral galaxy Sa","mag":13.3,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":172134124.0690913,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":327.69429166666663,"dec_deg":-70.33413888888889,"epoch_ra_deg":328.264959,"epoch_dec_deg":-70.208564,"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":"Indus","discovered":"1835","featured":false,"url":"https://spacecatalog.org/object/ngc-7123","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.3,"h_mag":8.81,"j_mag":9.61,"k_mag":8.47,"redshift":0.012459,"hubble_type":"Sa","wikidata_id":"Q1149740","redshift_cmb":0.012209745137347738,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[15720033.31922712,15720033.31922712]},"major_axis_arcmin":2.63,"minor_axis_arcmin":1.12,"position_angle_deg":145,"surface_brightness":23.78,"radial_velocity_km_s":3712},"designations":[{"catalog":"2MASX","designation":"2MASX J21504657-7020030"},{"catalog":"ESO","designation":"ESO 075-027"},{"catalog":"ESO","designation":"ESO 75-27"},{"catalog":"ESO-LV","designation":"ESO-LV 75-0270"},{"catalog":"LEDA","designation":"LEDA 67466"},{"catalog":"NGC","designation":"NGC 7123"},{"catalog":"PGC","designation":"PGC 67466"}],"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."}