{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.682","julian_year":2026.682,"time":"2026-09-07T02:36:56.320Z","years_from_j2000":26.682,"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-31294","name":"HD 31294","class":"k2iii_orange_giant","category":"star","object_type":"K2III orange giant","mag":7.33,"mag_band":"V","abs_mag":1.464,"abs_mag_band":"V","distance_ly":486.075089744173,"distance_method":"parallax","ra_deg":73.89411,"dec_deg":27.202421,"epoch_ra_deg":74.311728,"epoch_dec_deg":27.245401,"epoch_moved_arcsec":1.199,"pm_ra_mas_yr":-35.99,"pm_dec_mas_yr":-26.88,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-31294","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04556+2712","age_years":555854140,"companions":[{"measured":1988,"magnitude":10.1,"components":null,"discoverer_code":"OCC 753","separation_arcsec":0.1,"position_angle_deg":-1}],"mass_solar":2.603,"radius_solar":11.341,"spectral_type":"K2III","color_index_bv":1.281,"luminosity_solar":22.615177461083626,"radial_velocity_km_s":-2,"spectral_type_source":"SIMBAD (1954ArA.....1..425A, quality E)","surface_gravity_log_g":2.587,"surface_temperature_k":4825,"proper_motion_ra_mas_yr":-35.99,"proper_motion_dec_mas_yr":-26.88,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":65.0945},"designations":[{"catalog":"HD","designation":"HD 31294"},{"catalog":"HIP","designation":"HIP 22903"}],"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."}