{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.681","julian_year":2026.681,"time":"2026-09-06T17:22:21.586Z","years_from_j2000":26.681,"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-88986-b","name":"HD 88986 b","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":108.50342064416218,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":154.1166869,"dec_deg":28.6820708,"epoch_ra_deg":154.497408,"epoch_dec_deg":28.548289,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"HD 88986","semi_major_axis_km":86766765.00599998,"periapsis_km":null,"mass_kg":1.0272128732601171e+26,"mass_msun":0.00005166,"constellation":"Leo Minor","discovered":"2023","featured":false,"url":"https://spacecatalog.org/object/hd-88986-b","radius_km":15881.469000000003,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"HD 88986","host_v_mag":6.46974,"eccentricity":0.24,"uncertainties":{"mass_kg":[2.269423789760724e+25,2.3888671471165517e+25],"radius_km":[1148.058,1148.058],"distance_ly":[0.14970577737198523,0.14970577737198523],"eccentricity":[0.05,0.05],"host_mass_solar":[0.05,0.05],"inclination_deg":[0.1,0.1],"host_radius_solar":[0.01,0.01],"host_temperature_k":[17,17],"semi_major_axis_km":[5983914.828,5983914.828],"orbital_period_days":[0.4,0.43],"argument_of_periastron_deg":[11,10]},"host_mass_solar":1.25,"inclination_deg":89.9,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":1.543,"planets_in_system":1,"discovery_facility":"Haute-Provence Observatory","host_spectral_type":"G2 V","host_temperature_k":5861,"orbital_period_days":146.05,"transit_midpoint_bjd":2458891.69,"equilibrium_temperature_k":460,"argument_of_periastron_deg":306},"designations":[{"catalog":"Exoplanet","designation":"HD 88986 b"},{"catalog":"Host star","designation":"HD 88986"}],"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."}