{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.677","julian_year":2026.677,"time":"2026-09-05T02:35:45.896Z","years_from_j2000":26.677,"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-179767","name":"HD 179767","class":"f2v_yellow_white_main_sequence_star","category":"star","object_type":"F2V yellow-white main-sequence star","mag":8.27,"mag_band":"V","abs_mag":3.089,"abs_mag_band":"V","distance_ly":354.51795785385826,"distance_method":"parallax","ra_deg":288.63735,"dec_deg":-18.05977,"epoch_ra_deg":289.027912,"epoch_dec_deg":-18.013764,"epoch_moved_arcsec":0.504,"pm_ra_mas_yr":13.76,"pm_dec_mas_yr":-12.97,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Sagittarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-179767","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"19145-1804","age_years":1644910600,"companions":[{"measured":2015,"magnitude":12.1,"components":null,"discoverer_code":"BU  422","separation_arcsec":12.2,"position_angle_deg":31}],"mass_solar":1.466,"radius_solar":1.736,"spectral_type":"F2V","color_index_bv":0.377,"luminosity_solar":5.062907583460217,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1988MSS...C04....0H, quality C)","surface_gravity_log_g":4.044,"surface_temperature_k":6842,"proper_motion_ra_mas_yr":13.76,"proper_motion_dec_mas_yr":-12.97,"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":5.979},"designations":[{"catalog":"HD","designation":"HD 179767"},{"catalog":"HIP","designation":"HIP 94544"}],"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."}