{"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":"2026-09-09T00:55:15.636Z","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":"toi-6954-b","name":"TOI-6954 b","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":619.8341033404536,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":168.3240591,"dec_deg":-2.7877643,"epoch_ra_deg":168.666765,"epoch_dec_deg":-2.933899,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-6954","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":7.644374870772965e+25,"mass_msun":0.0000384447,"constellation":"Leo","discovered":"2026","featured":false,"url":"https://spacecatalog.org/object/toi-6954-b","radius_km":23185.955241566,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-6954","host_v_mag":12.262,"uncertainties":{"radius_km":[1786.6202331140003,1993.513551162],"distance_ly":[5.316348956782917,5.404411178766439],"host_mass_solar":[0.081994,0.114115],"inclination_deg":[2.03511,1.08722],"orbital_period_days":[0.00001475762,0.00001460861]},"host_mass_solar":0.834,"inclination_deg":88.36018,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.947112,"planets_in_system":1,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_temperature_k":5170.87,"orbital_period_days":4.02074127419,"transit_midpoint_bjd":2459539.99302642,"equilibrium_temperature_k":930},"designations":[{"catalog":"Exoplanet","designation":"TOI-6954 b"},{"catalog":"Host star","designation":"TOI-6954"}],"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."}