{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T18:20:59.137Z","years_from_j2000":26.684,"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":"lhs-1140-c","name":"LHS 1140 c","class":"super_earth","category":"exoplanet","object_type":"Super-Earth","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":48.878120921008886,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":11.248632,"dec_deg":-15.2741085,"epoch_ra_deg":11.585467,"epoch_dec_deg":-15.127028,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"LHS 1140","semi_major_axis_km":4039142.5089,"periapsis_km":null,"mass_kg":1.1406840627481533e+25,"mass_msun":0.00000573666,"constellation":"Cetus","discovered":"2018","featured":false,"url":"https://spacecatalog.org/object/lhs-1140-c","radius_km":8112.943200000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"LHS 1140","host_v_mag":14.15,"uncertainties":{"mass_kg":[3.5833007206748275e+23,3.5833007206748275e+23],"radius_km":[165.8306,165.8306],"distance_ly":[0.049575769412944996,0.049901925790661744],"host_mass_solar":[0.0045,0.0045],"inclination_deg":[0.19,0.14],"host_radius_solar":[0.003,0.003],"host_temperature_k":[48,48],"semi_major_axis_km":[74798.93535,74798.93535],"orbital_period_days":[0.000002,0.000002]},"host_mass_solar":0.1844,"inclination_deg":89.8,"stars_in_system":1,"discovery_method":"Transit","host_radius_solar":0.2159,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"M4.5 V","host_temperature_k":3096,"orbital_period_days":3.77794,"transit_midpoint_bjd":2458389.2939,"eccentricity_upper_limit":0.05,"equilibrium_temperature_k":422},"designations":[{"catalog":"Exoplanet","designation":"LHS 1140 c"}],"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."}