{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T09:02:48.381Z","years_from_j2000":26.683,"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-1288-c","name":"TOI-1288 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":374.6395232643373,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":313.1670294,"dec_deg":65.6087833,"epoch_ra_deg":313.266833,"epoch_dec_deg":65.709532,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"TOI-1288","semi_major_axis_km":160069721.649,"periapsis_km":null,"mass_kg":5.1181478626972124e+26,"mass_msun":0.000257399,"constellation":"Cepheus","discovered":"2022","featured":false,"url":"https://spacecatalog.org/object/toi-1288-c","radius_km":70796.91,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"TOI-1288","host_v_mag":10.445,"eccentricity":0,"uncertainties":{"mass_kg":[6.9874364053159135e+25,7.226323120027569e+25],"distance_ly":[1.0469619724707464,1.0502235362479138],"host_mass_solar":[0.0304,0.0319],"host_radius_solar":[0.0167,0.0166],"host_temperature_k":[66,68],"semi_major_axis_km":[4487936.120999999,4487936.120999999],"orbital_period_days":[12,12]},"host_mass_solar":0.9552,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.9583,"planets_in_system":2,"discovery_facility":"Multiple Observatories","host_spectral_type":"G V","host_temperature_k":5388,"orbital_period_days":416,"periastron_epoch_bjd":2458883,"transit_midpoint_bjd":2458894.4,"equilibrium_temperature_k":245.88,"argument_of_periastron_deg":90},"designations":[{"catalog":"Exoplanet","designation":"TOI-1288 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."}