{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T18:24:57.670Z","years_from_j2000":26.678,"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-3077","name":"NGC 3077","class":"spiral_galaxy_s","category":"galaxy","object_type":"Spiral galaxy S?","mag":9.88,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":150.82945833333332,"dec_deg":68.73391666666667,"epoch_ra_deg":151.363844,"epoch_dec_deg":68.604109,"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":"1801","featured":false,"url":"https://spacecatalog.org/object/ngc-3077","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.63,"h_mag":7.55,"j_mag":8.12,"k_mag":7.3,"v_mag":9.88,"redshift":0.00004,"hubble_type":"S?","wikidata_id":"Q744997","redshift_cmb":0.00032549887225186147,"discovered_by":"William Herschel","ngc_type_code":"G","major_axis_arcmin":5.21,"minor_axis_arcmin":4.32,"wikipedia_article":"NGC 3077","position_angle_deg":49,"surface_brightness":22.8,"radial_velocity_km_s":12},"designations":[{"catalog":"2MASX","designation":"2MASX J10031907+6844022"},{"catalog":"IRAS","designation":"IRAS 09592+6858"},{"catalog":"IRAS","designation":"IRAS F09593+6858"},{"catalog":"LEDA","designation":"LEDA 29146"},{"catalog":"MCG","designation":"MCG +12-10-017"},{"catalog":"NGC","designation":"NGC 3077"},{"catalog":"PGC","designation":"PGC 29146"},{"catalog":"SDSS","designation":"SDSS J100318.96+684403.9"},{"catalog":"UGC","designation":"UGC 5398"}],"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."}