{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T13:34:34.288Z","years_from_j2000":26.672,"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-196787","name":"75 Dra","class":"g9iii_yellow_giant","category":"star","object_type":"G9III yellow giant","mag":5.38,"mag_band":"V","abs_mag":-0.345,"abs_mag_band":"V","distance_ly":455.5256526253343,"distance_method":"parallax","ra_deg":307.060305,"dec_deg":81.422708,"epoch_ra_deg":306.599397,"epoch_dec_deg":81.510606,"epoch_moved_arcsec":0.998,"pm_ra_mas_yr":33.72,"pm_dec_mas_yr":16.19,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-196787","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20282+8125","age_years":250409070,"companions":[{"measured":2016,"magnitude":11.34,"components":"AB","discoverer_code":"BUP 211","separation_arcsec":109.5,"position_angle_deg":11},{"measured":2015,"magnitude":6.66,"components":"AC","discoverer_code":"STH   7","separation_arcsec":196.6,"position_angle_deg":282}],"mass_solar":3.501,"radius_solar":15.807,"spectral_type":"G9III","color_index_bv":1.01,"luminosity_solar":119.6740531307243,"metallicity_fe_h":-0.17,"radial_velocity_km_s":-6,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":2.49,"surface_temperature_k":4972,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":33.72,"proper_motion_dec_mas_yr":16.19,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":138.454},"designations":[{"catalog":"Bayer/Flamsteed","designation":"75 Dra"},{"catalog":"HD","designation":"HD 196787"},{"catalog":"HIP","designation":"HIP 100965"},{"catalog":"HR","designation":"HR 7901"}],"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."}