{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.687","julian_year":2026.687,"time":"2026-09-08T20:11:18.725Z","years_from_j2000":26.687,"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-287-002","name":"ESO 287-002","class":"lenticular_galaxy","category":"galaxy","object_type":"Lenticular galaxy","mag":14.469,"mag_band":"B","abs_mag":-20.04390346470916,"abs_mag_band":"B","distance_ly":260619296.50495577,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":319.366241,"dec_deg":-42.339752,"epoch_ra_deg":319.800357,"epoch_dec_deg":-42.227356,"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-287-002","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":14.469,"h_mag":10.981,"j_mag":11.666,"k_mag":10.717,"redshift":0.01784,"hubble_type":"-2.0","redshift_cmb":0.0184009283885386,"uncertainties":{"distance_ly":[13563488.061545582,13566550.650330205],"stellar_mass_solar":[3736608459.782166,3736608459.782166]},"major_axis_arcmin":1.07823,"minor_axis_arcmin":0.599604,"morphology_source":"SIMBAD (1989ESOLV.C......0L, quality D)","position_angle_deg":14,"stellar_mass_solar":29892867678.257328},"designations":[{"catalog":"2MASX","designation":"2MASX 21172789-4220231"},{"catalog":"PGC","designation":"PGC 66502"},{"catalog":"WISExSCOS","designation":"WISExSCOS J211727.91-422022.7"}],"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."}