{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T19:56:15.609Z","years_from_j2000":26.673,"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-85228","name":"HD 85228","class":"k2vcn_0_5_orange_dwarf","category":"star","object_type":"K2VCN+0.5 orange dwarf","mag":7.91,"mag_band":"V","abs_mag":5.834,"abs_mag_band":"V","distance_ly":84.8260984038152,"distance_method":"parallax","ra_deg":147.19515,"dec_deg":-52.615711,"epoch_ra_deg":147.42798,"epoch_dec_deg":-52.73856,"epoch_moved_arcsec":8.741,"pm_ra_mas_yr":-229.9,"pm_dec_mas_yr":233.52,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-85228","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"09488-5237","companions":[{"measured":2025,"magnitude":11.75,"components":null,"discoverer_code":"B  1663","separation_arcsec":1.3,"position_angle_deg":324}],"radius_solar":0.945,"spectral_type":"K2VCN+0.5","uncertainties":{"metallicity_fe_h":[0.08,0.08]},"color_index_bv":0.894,"luminosity_solar":0.40401733537300044,"metallicity_fe_h":0.12,"radial_velocity_km_s":4.4,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.407,"surface_temperature_k":4931,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-229.9,"proper_motion_dec_mas_yr":233.52,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.4651},"designations":[{"catalog":"Gliese","designation":"Gl 368.1A"},{"catalog":"HD","designation":"HD 85228"},{"catalog":"HIP","designation":"HIP 48133"}],"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."}