{"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":"2026-09-02T16:41:29.642Z","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":"tegmine","name":"Tegmine","class":"f8v_g0v_yellow_white_main_sequence_star","category":"star","object_type":"F8V+G0V yellow-white main-sequence star","mag":4.67,"mag_band":"V","abs_mag":2.673,"abs_mag_band":"V","distance_ly":81.80491187702499,"distance_method":"parallax","ra_deg":123.053025,"dec_deg":17.647771,"epoch_ra_deg":123.437335,"epoch_dec_deg":17.566633,"epoch_moved_arcsec":4.096,"pm_ra_mas_yr":28.29,"pm_dec_mas_yr":-150.94,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/tegmine","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08122+1739","companions":[{"measured":2025,"magnitude":6.25,"components":"AB","discoverer_code":"STF1196","separation_arcsec":1.1,"position_angle_deg":346},{"measured":2022,"magnitude":5.85,"components":"AC","discoverer_code":"STF1196","separation_arcsec":6.2,"position_angle_deg":61},{"measured":2025,"magnitude":5.85,"components":"AB,C","discoverer_code":"STF1196","separation_arcsec":6.3,"position_angle_deg":57},{"measured":2017,"magnitude":8.89,"components":"AB,D","discoverer_code":"STF1196","separation_arcsec":275.9,"position_angle_deg":107},{"measured":2007,"magnitude":10.08,"components":"AB,E","discoverer_code":"ENH   1","separation_arcsec":562.2,"position_angle_deg":26},{"measured":2007,"magnitude":10.26,"components":"AB,F","discoverer_code":"ENH   1","separation_arcsec":638.1,"position_angle_deg":46},{"measured":2007,"magnitude":10.15,"components":"AB,G","discoverer_code":"ENH   1","separation_arcsec":672.3,"position_angle_deg":332}],"spectral_type":"F8V+G0V","color_index_bv":0.531,"luminosity_solar":7.426770437146974,"radial_velocity_km_s":-11,"spectral_type_source":"SIMBAD (1981ApJS...45..437A, quality C)","proper_motion_ra_mas_yr":28.29,"proper_motion_dec_mas_yr":-150.94},"designations":[{"catalog":"Bayer/Flamsteed","designation":"16 Zeta2 Cnc"},{"catalog":"Common name","designation":"Tegmine"},{"catalog":"HD","designation":"HD 68255"},{"catalog":"HIP","designation":"HIP 40167"},{"catalog":"HR","designation":"HR 3210"}],"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."}