{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T00:23:03.926Z","years_from_j2000":26.679,"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-23079-c","name":"HD 23079 c","class":"neptune_like_planet","category":"exoplanet","object_type":"Neptune-like planet","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":109.12898857662289,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":54.9281897,"dec_deg":-52.9162344,"epoch_ra_deg":55.11225,"epoch_dec_deg":-52.828625,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 23079","semi_major_axis_km":null,"periapsis_km":null,"mass_kg":4.933010658795679e+25,"mass_msun":0.0000248088,"constellation":"Reticulum","discovered":"2025","featured":false,"url":"https://spacecatalog.org/object/hd-23079-c","radius_km":17858.68,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 23079","host_v_mag":7.12,"eccentricity":0.097,"uncertainties":{"mass_kg":[4.7180126155551896e+24,4.7180126155551896e+24],"distance_ly":[0.1135024194454267,0.11382857582314346],"eccentricity":[0.124,0.124],"host_mass_solar":[0.03,0.02],"host_radius_solar":[0.03,0.02],"host_temperature_k":[64,55],"orbital_period_days":[0.000204,0.000204],"argument_of_periastron_deg":[47.2,47.2]},"host_mass_solar":1.16,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.08,"planets_in_system":2,"discovery_facility":"La Silla Observatory","host_spectral_type":"F9.5 V","host_temperature_k":5994,"orbital_period_days":5.748913,"argument_of_periastron_deg":283.4},"designations":[{"catalog":"Exoplanet","designation":"HD 23079 c"},{"catalog":"Host star","designation":"HD 23079"}],"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."}