{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T08:33:59.399Z","years_from_j2000":26.677,"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":"wasp-170-b","name":"WASP-170 b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":996.7436749936994,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":135.4163028,"dec_deg":-20.7203686,"epoch_ra_deg":135.720119,"epoch_dec_deg":-20.825545,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"WASP-170","semi_major_axis_km":5041448.24259,"periapsis_km":null,"mass_kg":3.037014581472215e+27,"mass_msun":0.00152736,"constellation":"Pyxis","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/wasp-170-b","radius_km":78355.3666984,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"WASP-170","host_v_mag":12.613,"uncertainties":{"mass_kg":[3.7962682268402685e+26,3.7962682268402685e+26],"radius_km":[6076.8304465,6076.8304465],"distance_ly":[11.816645564677614,12.100401613291181],"host_mass_solar":[0.15,0.15],"inclination_deg":[0.28,0.28],"host_radius_solar":[0.061,0.056],"host_temperature_k":[150,150],"semi_major_axis_km":[269276.16725999996,269276.16725999996],"orbital_period_days":[0.0000036,0.0000036]},"host_mass_solar":0.93,"inclination_deg":84.87,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.938,"planets_in_system":1,"discovery_facility":"SuperWASP-South","host_temperature_k":5600,"orbital_period_days":2.34478022,"transit_midpoint_bjd":2457802.3915,"equilibrium_temperature_k":1422},"designations":[{"catalog":"Exoplanet","designation":"WASP-170 b"},{"catalog":"Host star","designation":"WASP-170"}],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"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."}