{"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":"2026-09-06T19:42:00.272Z","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-5882","name":"NGC 5882","class":"planetary_nebula","category":"nebula","object_type":"Planetary nebula","mag":10.18,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":7703.81364166948,"distance_method":"Statistical distance scale for planetary nebulae (Stanghellini+ 2008)","ra_deg":229.20833333333334,"dec_deg":-45.64930555555556,"epoch_ra_deg":229.667458,"epoch_dec_deg":-45.748307,"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":"Lupus","discovered":"1834","featured":false,"url":"https://spacecatalog.org/object/ngc-5882","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":11.33,"v_mag":10.18,"redshift":0.000026,"wikidata_id":"Q645537","discovered_by":"John Frederick William Herschel","ngc_type_code":"PN","major_axis_arcmin":0.23,"wikipedia_article":"NGC 5882","distance_reference":"NGC 5882","radial_velocity_km_s":8},"designations":[{"catalog":"ESO","designation":"ESO 274-007"},{"catalog":"ESO","designation":"ESO 274-7"},{"catalog":"HD","designation":"HD 135456"},{"catalog":"IC","designation":"IC 1108"},{"catalog":"IRAS","designation":"IRAS 15134-4527"},{"catalog":"IRAS","designation":"IRAS F15134-4527"},{"catalog":"NGC","designation":"NGC 5882"},{"catalog":"PN","designation":"PN G327.8+10.0"}],"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."}