{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T03:36:59.341Z","years_from_j2000":26.668,"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":"m107","name":"M107","class":"globular_cluster","category":"cluster","object_type":"Globular cluster","mag":8.85,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":20547.851796154835,"distance_method":"Globular-cluster distance scale (Harris 2010)","ra_deg":248.133,"dec_deg":-13.053638888888889,"epoch_ra_deg":248.509079,"epoch_dec_deg":-13.110999,"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":"Ophiuchus","discovered":"1782","featured":false,"url":"https://spacecatalog.org/object/m107","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":9.96,"v_mag":8.85,"redshift":-0.000116,"wikidata_id":"Q4755","discovered_by":"Pierre Méchain","ngc_type_code":"GCl","major_axis_arcmin":7.8,"wikipedia_article":"Messier 107","distance_reference":"NGC 6171","radial_velocity_km_s":-35},"designations":[{"catalog":"IAU cluster","designation":"C 1629-129"},{"catalog":"Messier","designation":"M 107"},{"catalog":"MWSC","designation":"MWSC 2422"},{"catalog":"NGC","designation":"NGC 6171"}],"source":{"id":"openngc","name":"OpenNGC","url":"https://github.com/mattiaverga/OpenNGC","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}