{"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":"2026-09-03T20:18:19.129Z","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-25842","name":"HD 25842","class":"g5v_yellow_main_sequence_star","category":"star","object_type":"G5V yellow main-sequence star","mag":8.48,"mag_band":"V","abs_mag":4.285,"abs_mag_band":"V","distance_ly":225.09062711003384,"distance_method":"parallax","ra_deg":60.938010000000006,"dec_deg":-44.481679,"epoch_ra_deg":61.154155,"epoch_dec_deg":-44.407927,"epoch_moved_arcsec":2.901,"pm_ra_mas_yr":-68.22,"pm_dec_mas_yr":-84.7,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Horologium","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-25842","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04038-4429","companions":[{"measured":2021,"magnitude":11.22,"components":"Aa,Ab","discoverer_code":"HDS 514","separation_arcsec":0.4,"position_angle_deg":106},{"measured":2015,"magnitude":9.58,"components":"AB","discoverer_code":"LCL 120","separation_arcsec":80.2,"position_angle_deg":1},{"measured":2015,"magnitude":8.18,"components":"AC","discoverer_code":"SHY 458","separation_arcsec":594.7,"position_angle_deg":303}],"spectral_type":"G5V","color_index_bv":0.723,"luminosity_solar":1.6826740610704667,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1978MSS...C02....0H, quality C)","surface_temperature_k":5496,"proper_motion_ra_mas_yr":-68.22,"proper_motion_dec_mas_yr":-84.7,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"HD","designation":"HD 25842"},{"catalog":"HIP","designation":"HIP 18958"}],"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."}