{"id":2129966,"slug":"ldn-1721","name":"LDN 1721","domain":"deep-sky","class":"nebula","otype":"DNe","otype_label":"DarkNeb","ra":243.61708333333337,"dec":-18.91222222222222,"coo_err_mas":null,"coo_bibcode":"1989ApJS...71...89B","plx_mas":null,"pmra":null,"pmdec":null,"rv_kms":null,"redshift":null,"dist_pc":null,"vmag":null,"bmag":null,"gmag":null,"jmag":null,"kmag":null,"sp_type":null,"morph_type":null,"size_maj":5.0,"size_min":5.0,"size_angle":90.0,"nbref":27,"simbad_oid":2529606,"gaia_dr3":null,"jpl_spkid":null,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":0,"deep_at":null,"views":7,"first_seen":"2026-08-14T16:50:56.835646+00:00","updated_at":"2026-08-14T16:50:56.835646+00:00","identifiers":["Barnard 40","[BM89] 1-63","[DB2002b] G355.47+22.63","LDN 1721","MLB 3-42","TGU H2178","TGU H2178 P1"],"measurements":[],"orbit":null,"exoplanet":null,"sources":[]}