{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.680","julian_year":2026.68,"time":"2026-09-06T12:20:54.916Z","years_from_j2000":26.68,"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-115680","name":"HIP 115680","class":"m0_5v_red_dwarf","category":"star","object_type":"M0.5V red dwarf","mag":10.56,"mag_band":"V","abs_mag":8.726,"abs_mag_band":"V","distance_ly":75.88549977784382,"distance_method":"parallax","ra_deg":351.551505,"dec_deg":8.893831,"epoch_ra_deg":351.895852,"epoch_dec_deg":9.043071,"epoch_moved_arcsec":14.959,"pm_ra_mas_yr":519.2,"pm_dec_mas_yr":211.67,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-115680","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":9080304000,"mass_solar":0.596,"radius_solar":0.674,"spectral_type":"M0.5V","color_index_bv":1.461,"luminosity_solar":0.02815788299710311,"variable_mag_max":10.496,"variable_mag_min":10.606,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1991ApJS...77..417K, quality B)","surface_gravity_log_g":4.263,"surface_temperature_k":3634,"proper_motion_ra_mas_yr":519.2,"proper_motion_dec_mas_yr":211.67,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.0732},"designations":[{"catalog":"Gliese","designation":"GJ 2155"},{"catalog":"HIP","designation":"HIP 115680"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"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."}