{"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":"2026-09-03T17:28:12.113Z","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-63023","name":"HD 63023","class":"g8_k0_iii_b_a_yellow_giant","category":"star","object_type":"G8/K0(III)+B/A yellow giant","mag":8.14,"mag_band":"V","abs_mag":2.164,"abs_mag_band":"V","distance_ly":511.2168541204682,"distance_method":"parallax","ra_deg":116.68704000000001,"dec_deg":-3.887591,"epoch_ra_deg":117.021881,"epoch_dec_deg":-3.953108,"epoch_moved_arcsec":0.123,"pm_ra_mas_yr":-1.07,"pm_dec_mas_yr":-4.48,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Monoceros","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-63023","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07467-0353","companions":[{"measured":1991,"magnitude":11.08,"components":null,"discoverer_code":"HDS1100","separation_arcsec":2.8,"position_angle_deg":70}],"spectral_type":"G8/K0(III)+B/A","color_index_bv":0.697,"luminosity_solar":11.868613846449191,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality E)","surface_temperature_k":6574,"proper_motion_ra_mas_yr":-1.07,"proper_motion_dec_mas_yr":-4.48,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 63023"},{"catalog":"HIP","designation":"HIP 37952"}],"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."}