{"id":25238,"slug":"c-1991-l4","name":"C/1991 L4","domain":"solar-system","class":"comet","otype":null,"otype_label":"Comet","ra":null,"dec":null,"coo_err_mas":null,"coo_bibcode":null,"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":null,"size_min":null,"size_angle":null,"nbref":0,"simbad_oid":null,"gaia_dr3":null,"jpl_spkid":1001251,"ned_name":null,"exo_name":null,"host_object_id":null,"depth":0,"deep_at":null,"views":1,"first_seen":"2026-08-14T16:44:22.482451+00:00","updated_at":"2026-10-18T03:31:03.825325+00:00","identifiers":["1991 L4","C/1991 L4","C/1991 L4 (Helin-Alu)","Helin-Alu"],"measurements":[],"orbit":{"object_id":25238,"epoch_jd":2448783.5,"a_au":-27130.0,"e":1.0002,"i_deg":49.29,"om_deg":253.65,"w_deg":30.79,"ma_deg":0.0,"q_au":4.85,"ad_au":null,"period_d":null,"moid_au":3.91,"orbit_class":"HYP","neo":false,"pha":false,"h_mag":null,"diameter_km":null,"albedo":null,"rot_period_h":null,"spec_b":null,"spec_t":null,"condition_code":null,"n_obs":80,"arc_days":534,"first_obs":"1991-06-13","last_obs":"1992-11-28","producer":"Otto Matic","source":"jpl-sbdb","updated_at":"2026-10-18T03:31:03.825325+00:00"},"exoplanet":null,"sources":[]}