{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.685","julian_year":2026.685,"time":"2026-09-08T08:25:16.531Z","years_from_j2000":26.685,"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":"lspm-j2116-0234-b","name":"LSPM J2116+0234 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":57.50039092232871,"distance_method":"NASA Exoplanet Archive sy_dist (TICv8, 2019AJ....158..138S)","ra_deg":319.1147513,"dec_deg":2.5807711,"epoch_ra_deg":319.454466,"epoch_dec_deg":2.69265,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":"LSPM J2116+0234","semi_major_axis_km":13104773.473319998,"periapsis_km":null,"mass_kg":7.942983264162534e+25,"mass_msun":0.0000399464,"constellation":"Equuleus","discovered":"2019","featured":false,"url":"https://spacecatalog.org/object/lspm-j2116-0234-b","radius_km":23662.751,"radius_kind":null,"data_quality":null,"description":null,"properties":{"host_star":"LSPM J2116+0234","host_v_mag":11.961,"eccentricity":0.183,"uncertainties":{"mass_kg":[6.569384654570517e+24,5.972167867791379e+24],"distance_ly":[0.06082816444417265,0.06082816444417265],"eccentricity":[0.063,0.062],"host_mass_solar":[0.031,0.031],"host_radius_solar":[0.015,0.015],"host_temperature_k":[51,51],"semi_major_axis_km":[314155.52846999996,329115.31554],"orbital_period_days":[0.0087,0.0078]},"host_mass_solar":0.43,"stars_in_system":1,"discovery_method":"Radial Velocity","host_radius_solar":0.431,"planets_in_system":1,"discovery_facility":"Calar Alto Observatory","host_spectral_type":"M3.0 V","host_temperature_k":3475,"orbital_period_days":14.4399,"transit_midpoint_bjd":2457573.6,"equilibrium_temperature_k":371.68},"designations":[{"catalog":"Exoplanet","designation":"LSPM J2116+0234 b"},{"catalog":"Host star","designation":"LSPM J2116+0234"}],"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."}