{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T21:34:11.487Z","years_from_j2000":26.665,"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-49705","name":"HD 49705","class":"g6iii_yellow_giant","category":"star","object_type":"G6III yellow giant","mag":6.45,"mag_band":"V","abs_mag":0.927,"abs_mag_band":"V","distance_ly":414.9573438957926,"distance_method":"parallax","ra_deg":101.67362999999999,"dec_deg":-54.695028,"epoch_ra_deg":101.809653,"epoch_dec_deg":-54.723065,"epoch_moved_arcsec":1.195,"pm_ra_mas_yr":-42.54,"pm_dec_mas_yr":14.08,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Carina","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-49705","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"06467-5442","companions":[{"measured":2016,"magnitude":9.34,"components":null,"discoverer_code":"I   157","separation_arcsec":2,"position_angle_deg":349}],"spectral_type":"G6III","color_index_bv":0.858,"luminosity_solar":37.08514658756861,"radial_velocity_km_s":3,"spectral_type_source":"SIMBAD (1975MSS...C01....0H, quality C)","proper_motion_ra_mas_yr":-42.54,"proper_motion_dec_mas_yr":14.08},"designations":[{"catalog":"HD","designation":"HD 49705"},{"catalog":"HIP","designation":"HIP 32477"},{"catalog":"HR","designation":"HR 2524"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}