{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-02T03:08:20.579Z","years_from_j2000":26.668,"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":"jishui","name":"Jishui","class":"f5_6iv_yellow_white_subgiant","category":"star","object_type":"F5-6IV yellow-white subgiant","mag":4.89,"mag_band":"V","abs_mag":1.352,"abs_mag_band":"V","distance_ly":166.321487878387,"distance_method":"parallax","ra_deg":114.7914,"dec_deg":34.584346,"epoch_ra_deg":115.229027,"epoch_dec_deg":34.522372,"epoch_moved_arcsec":3.291,"pm_ra_mas_yr":-35.97,"pm_dec_mas_yr":-118.03,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Gemini","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/jishui","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":1174685700,"mass_solar":1.955,"radius_solar":3.966,"spectral_type":"F5-6IV","color_index_bv":0.413,"luminosity_solar":25.07263624777119,"radial_velocity_km_s":7,"spectral_type_source":"SIMBAD (2020AJ....160...52M, quality D)","surface_gravity_log_g":3.484,"surface_temperature_k":6470,"proper_motion_ra_mas_yr":-35.97,"proper_motion_dec_mas_yr":-118.03,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":23.9878},"designations":[{"catalog":"Bayer/Flamsteed","designation":"71 Omicron Gem"},{"catalog":"Common name","designation":"Jishui"},{"catalog":"HD","designation":"HD 61110"},{"catalog":"HIP","designation":"HIP 37265"},{"catalog":"HR","designation":"HR 2930"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}