{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T09:09:56.796Z","years_from_j2000":26.675,"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-197076","name":"HD 197076","class":"g5v_yellow_main_sequence_star","category":"star","object_type":"G5V yellow main-sequence star","mag":6.43,"mag_band":"V","abs_mag":4.824,"abs_mag_band":"V","distance_ly":68.31932412757081,"distance_method":"parallax","ra_deg":310.18807499999997,"dec_deg":19.935536,"epoch_ra_deg":310.491123,"epoch_dec_deg":20.032884,"epoch_moved_arcsec":8.914,"pm_ra_mas_yr":119.13,"pm_dec_mas_yr":312.24,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Delphinus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-197076","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20408+1956","age_years":5449143400,"companions":[{"measured":1997,"magnitude":11.9,"components":"AB","discoverer_code":"BUP 215","separation_arcsec":69.4,"position_angle_deg":25},{"measured":2010,"magnitude":11.95,"components":"AC","discoverer_code":"LDS1045","separation_arcsec":125.2,"position_angle_deg":184}],"mass_solar":0.987,"radius_solar":1.007,"spectral_type":"G5V","uncertainties":{"metallicity_fe_h":[0.037,0.037]},"color_index_bv":0.611,"luminosity_solar":1.0242359141215682,"metallicity_fe_h":-0.085,"radial_velocity_km_s":-35.8,"spectral_type_source":"SIMBAD (2007AJ....133.2524W, quality C)","surface_gravity_log_g":4.351,"surface_temperature_k":5747,"metallicity_fe_h_source":"Median of 20 spectroscopic determinations in 27 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":119.13,"proper_motion_dec_mas_yr":312.24,"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":0.993},"designations":[{"catalog":"Gliese","designation":"Gl 797A"},{"catalog":"HD","designation":"HD 197076"},{"catalog":"HIP","designation":"HIP 102040"},{"catalog":"HR","designation":"HR 7914"}],"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."}