{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T17:14:02.907Z","years_from_j2000":26.67,"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-698","name":"NGC 698","class":"spiral_galaxy_sab","category":"galaxy","object_type":"Spiral galaxy Sab","mag":14.8,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":386536061.79177207,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":27.432083333333335,"dec_deg":-34.83108333333334,"epoch_ra_deg":27.729482,"epoch_dec_deg":-34.697527,"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":"Fornax","discovered":"1837","featured":false,"url":"https://spacecatalog.org/object/ngc-698","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.8,"h_mag":11.77,"j_mag":12.32,"k_mag":11.37,"redshift":0.027826,"hubble_type":"Sab","wikidata_id":"Q1038353","redshift_cmb":0.027116264175527816,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[21117844.27355097,21117844.27355097]},"major_axis_arcmin":0.93,"minor_axis_arcmin":0.79,"position_angle_deg":170,"surface_brightness":23.25,"radial_velocity_km_s":8226},"designations":[{"catalog":"2MASX","designation":"2MASX J01494371-3449517"},{"catalog":"ESO","designation":"ESO 353-051"},{"catalog":"ESO","designation":"ESO 353-51"},{"catalog":"ESO-LV","designation":"ESO-LV 353-0510"},{"catalog":"IRAS","designation":"IRAS F01475-3504"},{"catalog":"LEDA","designation":"LEDA 6710"},{"catalog":"MCG","designation":"MCG -06-05-005"},{"catalog":"NGC","designation":"NGC 698"},{"catalog":"PGC","designation":"PGC 6710"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}