{"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":"2026-09-04T00:09:27.477Z","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-4096","name":"NGC 4096","class":"intermediate_spiral_galaxy_sabc","category":"galaxy","object_type":"Intermediate spiral galaxy SABc","mag":10.57,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":35631464.73168787,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":181.50470833333333,"dec_deg":47.47844444444445,"epoch_ra_deg":181.846519,"epoch_dec_deg":47.328941,"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":"Ursa Major","discovered":"1788","featured":false,"url":"https://spacecatalog.org/object/ngc-4096","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.1,"h_mag":8.08,"j_mag":8.77,"k_mag":7.81,"v_mag":10.57,"redshift":0.00185,"hubble_type":"SABc","wikidata_id":"Q1108935","redshift_cmb":0.0025459070320470456,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14078645.33553755,14078645.33553755]},"major_axis_arcmin":5.65,"minor_axis_arcmin":1.43,"wikipedia_article":"NGC 4096","position_angle_deg":20,"surface_brightness":22.48,"radial_velocity_km_s":554},"designations":[{"catalog":"2MASX","designation":"2MASX J12060116+4728420"},{"catalog":"IRAS","designation":"IRAS 12034+4745"},{"catalog":"IRAS","designation":"IRAS F12034+4745"},{"catalog":"LEDA","designation":"LEDA 38361"},{"catalog":"MCG","designation":"MCG +08-22-067"},{"catalog":"NGC","designation":"NGC 4096"},{"catalog":"PGC","designation":"PGC 38361"},{"catalog":"SDSS","designation":"SDSS J120601.13+472842.3"},{"catalog":"SDSS","designation":"SDSS J120601.13+472842.4"},{"catalog":"UGC","designation":"UGC 7090"}],"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."}