{"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":"2026-09-04T07:29:02.387Z","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":"ngc-7129","name":"NGC 7129","class":"nebula_with_cluster","category":"nebula","object_type":"Nebula with cluster","mag":11.5,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":325.7459583333333,"dec_deg":66.11297222222221,"epoch_ra_deg":325.895556,"epoch_dec_deg":66.23537,"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":"Cepheus","discovered":"1794","featured":false,"url":"https://spacecatalog.org/object/ngc-7129","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.5,"v_mag":11.5,"wikidata_id":"Q1121278","discovered_by":"William Herschel","ngc_type_code":"Cl+N","major_axis_arcmin":2.1,"wikipedia_article":"NGC 7129"},"designations":[{"catalog":"2MASX","designation":"2MASX J21425712+6606350"},{"catalog":"IAU cluster","designation":"C 2140+658"},{"catalog":"LBN","designation":"LBN 497"},{"catalog":"Lynds","designation":"LBN 105.30+09.90"},{"catalog":"MWSC","designation":"MWSC 3549"},{"catalog":"NGC","designation":"NGC 7129"}],"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."}