{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T16:27:14.130Z","years_from_j2000":26.678,"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":"zavijava","name":"Zavijava","class":"f9v_yellow_white_main_sequence_star","category":"star","object_type":"F9V yellow-white main-sequence star","mag":3.59,"mag_band":"V","abs_mag":3.397,"abs_mag_band":"V","distance_ly":35.64563052066289,"distance_method":"parallax","ra_deg":177.67383,"dec_deg":1.764718,"epoch_ra_deg":178.023719,"epoch_dec_deg":1.61336,"epoch_moved_arcsec":21.05,"pm_ra_mas_yr":740.96,"pm_dec_mas_yr":-271.18,"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/zavijava","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"11507+0146","companions":[{"measured":2011,"magnitude":11.64,"components":"AB","discoverer_code":"STT 576","separation_arcsec":326.6,"position_angle_deg":286},{"measured":2012,"magnitude":9.56,"components":"AC","discoverer_code":"STT 576","separation_arcsec":415.7,"position_angle_deg":79}],"spectral_type":"F9V","uncertainties":{"metallicity_fe_h":[0.073,0.073]},"color_index_bv":0.518,"luminosity_solar":3.8124135110429895,"metallicity_fe_h":0.14,"radial_velocity_km_s":4.3,"spectral_type_source":"SIMBAD (1973ARA&A..11...29M, quality B)","surface_gravity_log_g":4.14,"surface_temperature_k":6107,"metallicity_fe_h_source":"Median of 34 spectroscopic determinations in 45 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":740.96,"proper_motion_dec_mas_yr":-271.18,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"5 Beta Vir"},{"catalog":"Common name","designation":"Zavijava"},{"catalog":"Gliese","designation":"Gl 449"},{"catalog":"HD","designation":"HD 102870"},{"catalog":"HIP","designation":"HIP 57757"},{"catalog":"HR","designation":"HR 4540"}],"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."}