{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T17:18:07.168Z","years_from_j2000":26.686,"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":"hd-93963-a-b","name":"HD 93963 A b","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":268.56759841605344,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":162.7766969,"dec_deg":25.641065,"epoch_ra_deg":163.143034,"epoch_dec_deg":25.498712,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 93963 A","semi_major_axis_km":3083212.1151269996,"periapsis_km":null,"mass_kg":1.6722070029815862e+25,"mass_msun":0.00000840977,"constellation":"Leo Minor","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/hd-93963-a-b","radius_km":9372.896545408,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 93963 A","host_v_mag":9.182,"eccentricity":0,"uncertainties":{"mass_kg":[1.3735986095920172e+25,1.3735986095920172e+25],"radius_km":[420.70483360400004,468.61374041100004],"distance_ly":[1.2707052475844323,1.282446877182235],"host_mass_solar":[0.0314,0.0252],"inclination_deg":[1.14,1.69],"host_radius_solar":[0.0169,0.0176],"host_temperature_k":[72,66],"semi_major_axis_km":[59839.14828,59839.14828],"orbital_period_days":[0.0000085,0.0000085]},"host_mass_solar":1.0844,"inclination_deg":86.21,"stars_in_system":2,"discovery_method":"Transit","host_radius_solar":1.0311,"planets_in_system":2,"discovery_facility":"Transiting Exoplanet Survey Satellite (TESS)","host_spectral_type":"G0 V","host_temperature_k":5908,"orbital_period_days":1.0376109,"transit_midpoint_bjd":2459635.926,"equilibrium_temperature_k":1842.23,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"HD 93963 A b"},{"catalog":"Host star","designation":"HD 93963 A"}],"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."}