{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T07:37:17.207Z","years_from_j2000":26.666,"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":"hip-102401","name":"HIP 102401","class":"m2v_red_dwarf","category":"star","object_type":"M2V red dwarf","mag":10.79,"mag_band":"V","abs_mag":10.337,"abs_mag_band":"V","distance_ly":40.18181342194736,"distance_method":"parallax","ra_deg":311.26665,"dec_deg":44.499073,"epoch_ra_deg":311.50324,"epoch_dec_deg":44.598171,"epoch_moved_arcsec":13.661,"pm_ra_mas_yr":433.52,"pm_dec_mas_yr":272.98,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-102401","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"radius_solar":0.432,"spectral_type":"M2V","color_index_bv":1.491,"luminosity_solar":0.006385574850788391,"variable_mag_max":10.721,"variable_mag_min":10.841,"radial_velocity_km_s":-24.4,"spectral_type_source":"SIMBAD (1991ApJS...77..417K, quality B)","surface_gravity_log_g":4.817,"surface_temperature_k":3527,"proper_motion_ra_mas_yr":433.52,"proper_motion_dec_mas_yr":272.98,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":0.0261},"designations":[{"catalog":"Exoplanet host","designation":"GJ 806"},{"catalog":"Gliese","designation":"Gl 806"},{"catalog":"HIP","designation":"HIP 102401"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}