{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.666","julian_year":2026.666,"time":"2026-09-01T05:15:14.749Z","years_from_j2000":26.666,"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":"sarin","name":"Sarin","class":"a1ivn_white_subgiant","category":"star","object_type":"A1IVn white subgiant","mag":3.12,"mag_band":"V","abs_mag":1.308,"abs_mag_band":"V","distance_ly":75.13403548358446,"distance_method":"parallax","ra_deg":258.75796499999996,"dec_deg":24.839204,"epoch_ra_deg":259.03414,"epoch_dec_deg":24.806977,"epoch_moved_arcsec":4.242,"pm_ra_mas_yr":-21.14,"pm_dec_mas_yr":-157.68,"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/sarin","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17150+2450","companions":[{"measured":1989,"magnitude":4.4,"components":"Aa,Ab","discoverer_code":"BNU   5","separation_arcsec":0.1,"position_angle_deg":7},{"measured":2025,"magnitude":8.3,"components":"AB","discoverer_code":"STF3127","separation_arcsec":15.2,"position_angle_deg":294},{"measured":2023,"magnitude":10.45,"components":"AC","discoverer_code":"STF3127","separation_arcsec":175.5,"position_angle_deg":353},{"measured":2023,"magnitude":10.59,"components":"AD","discoverer_code":"STF3127","separation_arcsec":191.6,"position_angle_deg":89}],"spectral_type":"A1IVn","color_index_bv":0.08,"luminosity_solar":26.109586865859324,"radial_velocity_km_s":-40,"spectral_type_source":"SIMBAD (2003AJ....126.2048G, quality C)","surface_temperature_k":8507,"proper_motion_ra_mas_yr":-21.14,"proper_motion_dec_mas_yr":-157.68,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"65 Delta Her"},{"catalog":"Common name","designation":"Sarin"},{"catalog":"Gliese","designation":"GJ 3995A"},{"catalog":"HD","designation":"HD 156164"},{"catalog":"HIP","designation":"HIP 84379"},{"catalog":"HR","designation":"HR 6410"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}