{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.663","julian_year":2026.663,"time":"2026-08-31T05:38:21.121Z","years_from_j2000":26.663,"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":"m89","name":"M89","class":"elliptical_galaxy_e","category":"galaxy","object_type":"Elliptical galaxy E","mag":10.08,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":188.915875,"dec_deg":12.556333333333335,"epoch_ra_deg":189.255124,"epoch_dec_deg":12.408388,"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":"Virgo","discovered":"1781","featured":false,"url":"https://spacecatalog.org/object/m89","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.68,"h_mag":6.94,"j_mag":7.62,"k_mag":6.73,"v_mag":10.08,"redshift":0.000914,"hubble_type":"E","wikidata_id":"Q14337","redshift_cmb":0.001998622709512121,"discovered_by":"Charles Messier","ngc_type_code":"G","major_axis_arcmin":8.13,"minor_axis_arcmin":8,"wikipedia_article":"Messier 89","position_angle_deg":150,"surface_brightness":24.11,"radial_velocity_km_s":274},"designations":[{"catalog":"2MASX","designation":"2MASX J12353988+1233217"},{"catalog":"LEDA","designation":"LEDA 41968"},{"catalog":"MCG","designation":"MCG +02-32-149"},{"catalog":"Messier","designation":"M 89"},{"catalog":"NGC","designation":"NGC 4552"},{"catalog":"PGC","designation":"PGC 41968"},{"catalog":"SDSS","designation":"SDSS J123539.80+123322.8"},{"catalog":"UGC","designation":"UGC 7760"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}