{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.664","julian_year":2026.664,"time":"2026-08-31T09:04:56.561Z","years_from_j2000":26.664,"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":"almach","name":"Almach","class":"k2_iib_orange_star","category":"star","object_type":"K2+IIb orange star","mag":2.1,"mag_band":"V","abs_mag":-3.305,"abs_mag_band":"V","distance_ly":392.9594008443091,"distance_method":"parallax","ra_deg":30.97476,"dec_deg":42.329725,"epoch_ra_deg":31.387985,"epoch_dec_deg":42.458415,"epoch_moved_arcsec":1.777,"pm_ra_mas_yr":43.08,"pm_dec_mas_yr":-50.85,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Andromeda","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/almach","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02039+4220","companions":[{"measured":2024,"magnitude":5.02,"components":"A,BC","discoverer_code":"STF 205","separation_arcsec":9.5,"position_angle_deg":63},{"measured":1898,"magnitude":15,"components":"AD","discoverer_code":"BAR  22","separation_arcsec":27.9,"position_angle_deg":245}],"spectral_type":"K2+IIb","uncertainties":{"metallicity_fe_h":[0.165,0.165]},"color_index_bv":1.37,"luminosity_solar":1828.1002161427427,"metallicity_fe_h":0,"radial_velocity_km_s":-12,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","surface_gravity_log_g":1.03,"surface_temperature_k":4277,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 7 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":43.08,"proper_motion_dec_mas_yr":-50.85,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"57 Gamma1 And"},{"catalog":"Common name","designation":"Almach"},{"catalog":"HD","designation":"HD 12533"},{"catalog":"HIP","designation":"HIP 9640"},{"catalog":"HR","designation":"HR 603"}],"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."}