{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T09:56:45.059Z","years_from_j2000":26.672,"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-3377a","name":"NGC 3377A","class":"intermediate_spiral_galaxy_sabm","category":"galaxy","object_type":"Intermediate spiral galaxy SABm","mag":13.71,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":42632687.24620993,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":161.84291666666667,"dec_deg":14.069444444444445,"epoch_ra_deg":162.199011,"epoch_dec_deg":13.927964,"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":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/ngc-3377a","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.4,"v_mag":13.71,"redshift":0.001898,"hubble_type":"SABm","wikidata_id":"Q1104457","redshift_cmb":0.0030449963138834413,"discovered_by":"William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[14115468.691136187,14115468.691136187]},"major_axis_arcmin":1.43,"minor_axis_arcmin":1.37,"position_angle_deg":0,"surface_brightness":23.88,"radial_velocity_km_s":568},"designations":[{"catalog":"LEDA","designation":"LEDA 32226"},{"catalog":"MCG","designation":"MCG +02-28-007"},{"catalog":"NGC","designation":"NGC 3377A"},{"catalog":"PGC","designation":"PGC 32226"},{"catalog":"UGC","designation":"UGC 5889"}],"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."}