{"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":"2026-09-05T20:26:24.998Z","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-1716","name":"NGC 1716","class":"spiral_galaxy_sbc","category":"galaxy","object_type":"Spiral galaxy Sbc","mag":13.94,"mag_band":"B","abs_mag":null,"abs_mag_band":null,"distance_ly":322905340.6463367,"distance_method":"redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":74.55550000000001,"dec_deg":-20.363583333333334,"epoch_ra_deg":74.846416,"epoch_dec_deg":-20.321917,"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":"Lepus","discovered":"1835","featured":false,"url":"https://spacecatalog.org/object/ngc-1716","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":13.94,"h_mag":10.54,"j_mag":11.18,"k_mag":10.12,"redshift":0.022742,"hubble_type":"Sbc","wikidata_id":"Q1044871","redshift_cmb":0.022725724780155554,"discovered_by":"John Frederick William Herschel","ngc_type_code":"G","uncertainties":{"distance_ly":[19271482.943338636,19271482.943338636]},"major_axis_arcmin":1.32,"minor_axis_arcmin":1.12,"wikipedia_article":"NGC 1716","position_angle_deg":20,"surface_brightness":23.15,"radial_velocity_km_s":6740},"designations":[{"catalog":"2MASX","designation":"2MASX J04581333-2021487"},{"catalog":"ESO","designation":"ESO 552-034"},{"catalog":"ESO","designation":"ESO 552-34"},{"catalog":"ESO-LV","designation":"ESO-LV 552-0340"},{"catalog":"IRAS","designation":"IRAS 04560-2026"},{"catalog":"IRAS","designation":"IRAS F04560-2026"},{"catalog":"LEDA","designation":"LEDA 16434"},{"catalog":"MCG","designation":"MCG -03-13-038"},{"catalog":"NGC","designation":"NGC 1716"},{"catalog":"PGC","designation":"PGC 16434"}],"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."}