{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T10:51:25.677Z","years_from_j2000":26.686,"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-162734","name":"HD 162734","class":"k0iii_orange_giant","category":"star","object_type":"K0III orange giant","mag":6.43,"mag_band":"V","abs_mag":-0.418,"abs_mag_band":"V","distance_ly":763.8321441023958,"distance_method":"parallax","ra_deg":267.993585,"dec_deg":15.326372,"epoch_ra_deg":268.296877,"epoch_dec_deg":15.319517,"epoch_moved_arcsec":1.089,"pm_ra_mas_yr":-6.88,"pm_dec_mas_yr":40.23,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hercules","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-162734","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17520+1520","companions":[{"measured":2024,"magnitude":7.38,"components":"AB","discoverer_code":"STT 338","separation_arcsec":0.8,"position_angle_deg":161},{"measured":2015,"magnitude":13.1,"components":"AC","discoverer_code":"STT 338","separation_arcsec":32.6,"position_angle_deg":202},{"measured":2015,"magnitude":11.6,"components":"AD","discoverer_code":"STT 338","separation_arcsec":96.3,"position_angle_deg":247}],"spectral_type":"K0III","color_index_bv":0.997,"luminosity_solar":127.99706167051806,"radial_velocity_km_s":-43,"spectral_type_source":"SIMBAD (quality C)","proper_motion_ra_mas_yr":-6.88,"proper_motion_dec_mas_yr":40.23},"designations":[{"catalog":"HD","designation":"HD 162734"},{"catalog":"HIP","designation":"HIP 87427"},{"catalog":"HR","designation":"HR 6665"}],"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."}