{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T01:49:46.732Z","years_from_j2000":26.679,"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-3006","name":"NGC 3006","class":"spiral_galaxy_sbc","category":"galaxy","object_type":"Spiral galaxy Sbc","mag":15.57,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":236830200.5618747,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":147.32225,"dec_deg":44.02580555555556,"epoch_ra_deg":147.745721,"epoch_dec_deg":43.900859,"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":"1851","featured":false,"url":"https://spacecatalog.org/object/ngc-3006","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.57,"h_mag":11.87,"j_mag":12.68,"k_mag":11.59,"redshift":0.01601,"hubble_type":"Sbc","wikidata_id":"Q1102399","redshift_cmb":0.016741951527451837,"discovered_by":"William Parsons, 3rd Earl of Rosse","ngc_type_code":"G","uncertainties":{"distance_ly":[17070802.66799879,17070802.66799879]},"major_axis_arcmin":0.82,"minor_axis_arcmin":0.29,"wikipedia_article":"NGC 3006","position_angle_deg":83,"surface_brightness":23.18,"radial_velocity_km_s":4761},"designations":[{"catalog":"2MASX","designation":"2MASX J09491734+4401328"},{"catalog":"IRAS","designation":"IRAS F09461+4415"},{"catalog":"LEDA","designation":"LEDA 28235"},{"catalog":"MCG","designation":"MCG +07-20-055"},{"catalog":"NGC","designation":"NGC 3006"},{"catalog":"PGC","designation":"PGC 28235"},{"catalog":"SDSS","designation":"SDSS J094917.34+440132.8"}],"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."}