{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T23:41:34.046Z","years_from_j2000":26.668,"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-37889","name":"HD 37889","class":"b3ii_iii_blue_white_bright_giant","category":"star","object_type":"B3II/III blue-white bright giant","mag":7.64,"mag_band":"V","abs_mag":-0.495,"abs_mag_band":"V","distance_ly":1382.0185054226242,"distance_method":"parallax","ra_deg":85.343355,"dec_deg":-6.935198,"epoch_ra_deg":85.669288,"epoch_dec_deg":-6.921186,"epoch_moved_arcsec":0.077,"pm_ra_mas_yr":2.86,"pm_dec_mas_yr":-0.29,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Orion","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-37889","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"B3II/III","color_index_bv":-0.111,"luminosity_solar":137.4041975012515,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality D)","proper_motion_ra_mas_yr":2.86,"proper_motion_dec_mas_yr":-0.29},"designations":[{"catalog":"HD","designation":"HD 37889"},{"catalog":"HIP","designation":"HIP 26785"}],"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."}