{"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":"2026-09-02T13:40:38.688Z","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-1102","name":"NGC 1102","class":"intermediate_spiral_galaxy_saba","category":"galaxy","object_type":"Intermediate spiral galaxy SABa","mag":15.33,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":531054173.9595387,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":41.803749999999994,"dec_deg":-22.20883333333333,"epoch_ra_deg":42.107776,"epoch_dec_deg":-22.096134,"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":"Eridanus","discovered":"1886","featured":false,"url":"https://spacecatalog.org/object/ngc-1102","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.33,"h_mag":11.34,"j_mag":12.17,"k_mag":11.2,"redshift":0.037623,"hubble_type":"SABa","wikidata_id":"Q1041553","redshift_cmb":0.03698776455349129,"discovered_by":"Francis Preserved Leavenworth","ngc_type_code":"G","uncertainties":{"distance_ly":[25770602.57417808,25770602.57417808]},"major_axis_arcmin":0.89,"minor_axis_arcmin":0.58,"position_angle_deg":90,"surface_brightness":23.48,"radial_velocity_km_s":11067},"designations":[{"catalog":"2MASX","designation":"2MASX J02471288-2212317"},{"catalog":"ESO","designation":"ESO 546-019"},{"catalog":"ESO","designation":"ESO 546-19"},{"catalog":"ESO-LV","designation":"ESO-LV 546-0190"},{"catalog":"LEDA","designation":"LEDA 10545"},{"catalog":"MCG","designation":"MCG -04-07-041"},{"catalog":"NGC","designation":"NGC 1102"},{"catalog":"PGC","designation":"PGC 10545"}],"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."}