{"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":"2026-09-01T23:04:16.367Z","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-101396","name":"HD 101396","class":"k1v_orange_dwarf","category":"star","object_type":"K1V orange dwarf","mag":8.13,"mag_band":"V","abs_mag":3.152,"abs_mag_band":"V","distance_ly":322.92710342096996,"distance_method":"parallax","ra_deg":175.052685,"dec_deg":26.153491,"epoch_ra_deg":175.404426,"epoch_dec_deg":26.004576,"epoch_moved_arcsec":1.818,"pm_ra_mas_yr":64.72,"pm_dec_mas_yr":-21.4,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Leo","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-101396","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"11402+2609","companions":[{"measured":2018,"magnitude":11.24,"components":null,"discoverer_code":"HDS1652","separation_arcsec":0.5,"position_angle_deg":264}],"spectral_type":"K1V","color_index_bv":0.929,"luminosity_solar":4.7774923465909405,"variable_mag_max":8.1,"variable_mag_min":8.26,"radial_velocity_km_s":-9.7,"spectral_type_source":"SIMBAD (2018MNRAS.481.3244G, quality C)","proper_motion_ra_mas_yr":64.72,"proper_motion_dec_mas_yr":-21.4},"designations":[{"catalog":"HD","designation":"HD 101396"},{"catalog":"HIP","designation":"HIP 56921"}],"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."}