{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T00:44:12.290Z","years_from_j2000":26.682,"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-94890-c","name":"HD 94890 c","class":"gas_giant","category":"exoplanet","object_type":"Gas giant","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":201.24239892776328,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":164.1797804,"dec_deg":-37.1383035,"epoch_ra_deg":164.49167,"epoch_dec_deg":-37.281698,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 94890","semi_major_axis_km":647758780.1309999,"periapsis_km":null,"mass_kg":1.691229018383238e+28,"mass_msun":0.00850543,"constellation":"Antlia","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/hd-94890-c","radius_km":79726.25,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 94890","host_v_mag":4.6,"eccentricity":0.05,"uncertainties":{"mass_kg":[4.745311499391802e+26,4.5554990394161295e+26],"distance_ly":[2.355175203492604,2.355175203492604],"eccentricity":[0.03,0.03],"host_mass_solar":[0.196,0.196],"host_radius_solar":[0.23,0.23],"host_temperature_k":[38,38],"semi_major_axis_km":[2991957.414,2991957.414],"orbital_period_days":[13.94,14.72],"argument_of_periastron_deg":[1.4,1.44]},"host_mass_solar":1.74,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":10.71,"planets_in_system":2,"discovery_facility":"La Silla Observatory","host_spectral_type":"K0 III","host_temperature_k":4867,"orbital_period_days":2492.19,"equilibrium_temperature_k":369.1,"argument_of_periastron_deg":232.65},"designations":[{"catalog":"Exoplanet","designation":"HD 94890 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."}