{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T14:38:51.154Z","years_from_j2000":26.675,"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":"7-cma-b","name":"7 CMa b","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":64.61190458206458,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":99.171276,"dec_deg":-19.2561808,"epoch_ra_deg":99.463677,"epoch_dec_deg":-19.278129,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"7 CMa","semi_major_axis_km":262993056.69059998,"periapsis_km":null,"mass_kg":3.511548109827248e+27,"mass_msun":0.00176601,"constellation":"Canis Major","discovered":"2011","featured":false,"url":"https://spacecatalog.org/object/7-cma-b","radius_km":85466.54000000001,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"7 CMa","host_v_mag":3.95,"eccentricity":0.06,"uncertainties":{"mass_kg":[1.1388804680520805e+26,1.1388804680520805e+26],"distance_ly":[0.5375057104771932,0.5375057104771932],"eccentricity":[0.03,0.03],"host_mass_solar":[0.12,0.11],"host_radius_solar":[0.14,0.17],"host_temperature_k":[55,45],"semi_major_axis_km":[149597.8707,3590348.8967999998],"orbital_period_days":[1,14.8],"argument_of_periastron_deg":[70.8,5.1]},"host_mass_solar":1.34,"inclination_deg":90,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":4.87,"planets_in_system":2,"discovery_facility":"Anglo-Australian Telescope","host_spectral_type":"K1III(+M)","host_temperature_k":4826,"orbital_period_days":735.1,"periastron_epoch_bjd":2454093,"equilibrium_temperature_k":387.33,"argument_of_periastron_deg":165.3},"designations":[{"catalog":"Exoplanet","designation":"7 CMa b"},{"catalog":"Host star","designation":"7 CMa"}],"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."}