{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.670","julian_year":2026.67,"time":"2026-09-02T16:14:01.273Z","years_from_j2000":26.67,"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-50635","name":"38 Gem","class":"ka8mf0vp_white_main_sequence_star","category":"star","object_type":"kA8mF0Vp white main-sequence star","mag":4.73,"mag_band":"V","abs_mag":2.686,"abs_mag_band":"V","distance_ly":83.58703032486929,"distance_method":"parallax","ra_deg":103.66098000000001,"dec_deg":13.177827,"epoch_ra_deg":104.039594,"epoch_dec_deg":13.143704,"epoch_moved_arcsec":2.794,"pm_ra_mas_yr":70.19,"pm_dec_mas_yr":-77.79,"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/hd-50635","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06546+1311","companions":[{"measured":2023,"magnitude":7.8,"components":"AB","discoverer_code":"STF 982","separation_arcsec":7.4,"position_angle_deg":142},{"measured":2015,"magnitude":11.32,"components":"AC","discoverer_code":"STF 982","separation_arcsec":120.8,"position_angle_deg":328},{"measured":2015,"magnitude":15.5,"components":"AD","discoverer_code":"TOK 261","separation_arcsec":151.6,"position_angle_deg":104}],"spectral_type":"kA8mF0Vp","color_index_bv":0.321,"luminosity_solar":7.338376673335376,"radial_velocity_km_s":14.8,"spectral_type_source":"SIMBAD (1955ApJ...121..653S, quality C)","proper_motion_ra_mas_yr":70.19,"proper_motion_dec_mas_yr":-77.79},"designations":[{"catalog":"Bayer/Flamsteed","designation":"38 Gem"},{"catalog":"Gliese","designation":"GJ 9220A"},{"catalog":"HD","designation":"HD 50635"},{"catalog":"HIP","designation":"HIP 33202"},{"catalog":"HR","designation":"HR 2564"}],"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."}