{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T14:53:40.054Z","years_from_j2000":26.681,"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-6826","name":"Blinking Planetary","class":"planetary_nebula","category":"nebula","object_type":"Planetary nebula","mag":9.44,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":5185.88640569622,"distance_method":"Statistical distance scale for planetary nebulae (Stanghellini+ 2008)","ra_deg":296.20045833333336,"dec_deg":50.52502777777778,"epoch_ra_deg":296.380441,"epoch_dec_deg":50.589216,"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":"Cygnus","discovered":"1793","featured":false,"url":"https://spacecatalog.org/object/ngc-6826","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":10.02,"h_mag":9.6,"j_mag":9.57,"k_mag":8.9,"v_mag":9.44,"redshift":-0.000021,"wikidata_id":"Q725474","discovered_by":"William Herschel","ngc_type_code":"PN","major_axis_arcmin":0.42,"wikipedia_article":"NGC 6826","distance_reference":"NGC 6826","radial_velocity_km_s":-6},"designations":[{"catalog":"2MASX","designation":"2MASX J19444814+5031304"},{"catalog":"Caldwell","designation":"C 15"},{"catalog":"Common name","designation":"Blinking Planetary"},{"catalog":"HD","designation":"HD 186924"},{"catalog":"IRAS","designation":"IRAS 19434+5024"},{"catalog":"NGC","designation":"NGC 6826"},{"catalog":"PN","designation":"PN G083.5+12.7"}],"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."}