{"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":"2026-09-01T21:38:47.056Z","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":"pgc-26317","name":"PGC 26317","class":"spiral_galaxy","category":"galaxy","object_type":"Spiral galaxy","mag":15.382,"mag_band":"B","abs_mag":-18.682677352928565,"abs_mag_band":"B","distance_ly":212012440.75236747,"distance_method":"luminosity distance from a spectroscopic redshift (GLADE+), flat ΛCDM with H0 = 70 km/s/Mpc","ra_deg":139.731613,"dec_deg":14.304857,"epoch_ra_deg":140.100495,"epoch_dec_deg":14.191989,"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":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/pgc-26317","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"b_mag":15.382,"h_mag":13.608,"j_mag":14.278,"k_mag":13.434,"redshift":0.01446,"hubble_type":"3","redshift_cmb":0.0150069401834617,"uncertainties":{"distance_ly":[11060956.079242231,11062953.644499414],"stellar_mass_solar":[467086031.8122199,467086031.8122199]},"major_axis_arcmin":0.78991,"minor_axis_arcmin":0.253561,"morphology_source":"SIMBAD (2005ApJS..160..149S, quality D)","position_angle_deg":113,"stellar_mass_solar":934172063.6244398},"designations":[{"catalog":"2MASX","designation":"2MASX 09185558+1418174"},{"catalog":"PGC","designation":"PGC 26317"},{"catalog":"WISExSCOS","designation":"WISExSCOS J091855.49+141817.7"}],"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":"2026-08-30T09:56:50.739Z","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."}