{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T13:37:36.412Z","years_from_j2000":26.678,"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-285-050","name":"ESO 285-050","class":"spiral_galaxy","category":"galaxy","object_type":"Spiral galaxy","mag":14.855,"mag_band":"B","abs_mag":-19.67968954050455,"abs_mag_band":"B","distance_ly":263247213.7919991,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":311.380463,"dec_deg":-43.530064,"epoch_ra_deg":311.832096,"epoch_dec_deg":-43.432482,"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":"Microscopium","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/eso-285-050","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.855,"h_mag":11.557,"j_mag":12.355,"k_mag":11.304,"redshift":0.01801,"hubble_type":"0.8","redshift_cmb":0.0185839453240601,"uncertainties":{"distance_ly":[13583792.023393264,13586938.470855255],"stellar_mass_solar":[5604906255.066203,5604906255.066203]},"major_axis_arcmin":0.889467,"minor_axis_arcmin":0.439308,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":26,"stellar_mass_solar":13078114595.154474},"designations":[{"catalog":"2MASX","designation":"2MASX 20453131-4331482"},{"catalog":"PGC","designation":"PGC 65323"},{"catalog":"WISExSCOS","designation":"WISExSCOS J204531.36-433147.6"}],"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."}