{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T08:43:02.564Z","years_from_j2000":26.669,"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":"syrma","name":"Syrma","class":"f7iii_yellow_white_giant","category":"star","object_type":"F7III yellow-white giant","mag":4.07,"mag_band":"V","abs_mag":2.335,"abs_mag_band":"V","distance_ly":72.52739371287223,"distance_method":"parallax","ra_deg":214.00362,"dec_deg":-6.000547,"epoch_ra_deg":214.356155,"epoch_dec_deg":-6.128608,"epoch_moved_arcsec":11.218,"pm_ra_mas_yr":-25.84,"pm_dec_mas_yr":-419.84,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Virgo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/syrma","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"F7III","uncertainties":{"metallicity_fe_h":[0.093,0.093]},"color_index_bv":0.511,"luminosity_solar":10.139113857366794,"metallicity_fe_h":-0.075,"radial_velocity_km_s":14.6,"spectral_type_source":"SIMBAD (2001AJ....121.2148G, quality C)","surface_gravity_log_g":3.8,"surface_temperature_k":6172,"metallicity_fe_h_source":"Median of 10 spectroscopic determinations in 12 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-25.84,"proper_motion_dec_mas_yr":-419.84,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"99 Iota Vir"},{"catalog":"Common name","designation":"Syrma"},{"catalog":"Gliese","designation":"GJ 9473"},{"catalog":"HD","designation":"HD 124850"},{"catalog":"HIP","designation":"HIP 69701"},{"catalog":"HR","designation":"HR 5338"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}