{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-08T00:05:34.923Z","years_from_j2000":26.684,"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":"eso-387-027","name":"ESO 387-027","class":"lenticular_galaxy","category":"galaxy","object_type":"Lenticular galaxy","mag":14.983,"mag_band":"B","abs_mag":-19.47096345498279,"abs_mag_band":"B","distance_ly":253640479.89052117,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":230.312897,"dec_deg":-37.033504,"epoch_ra_deg":230.743339,"epoch_dec_deg":-37.130378,"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":null,"featured":false,"url":"https://spacecatalog.org/object/eso-387-027","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.983,"h_mag":11.433,"j_mag":12.157,"k_mag":11.136,"redshift":0.0173,"hubble_type":"-1.0","redshift_cmb":0.0179146634577537,"uncertainties":{"distance_ly":[13545555.517360711,13548351.609769238],"stellar_mass_solar":[7473239863.366939,7473239863.366939]},"major_axis_arcmin":0.543,"minor_axis_arcmin":0.239,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":10,"stellar_mass_solar":15880634709.654743},"designations":[{"catalog":"2MASX","designation":"2MASX 15211509-3702006"},{"catalog":"PGC","designation":"PGC 54786"},{"catalog":"WISExSCOS","designation":"WISExSCOS J152115.10-370200.3"}],"source":{"id":"glade_plus","name":"GLADE+ (Galaxy List for the Advanced Detector Era)","url":"https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/291","license":"VizieR terms; cite Dalya+ 2022 (2022MNRAS.514.1403D)"},"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."}