{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T17:05:57.173Z","years_from_j2000":26.654,"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-201092","name":"61 Cyg B","class":"k7v_orange_dwarf","category":"star","object_type":"K7V orange dwarf","mag":6.05,"mag_band":"V","abs_mag":8.331,"abs_mag_band":"V","distance_ly":11.408950092531686,"distance_method":"parallax","ra_deg":316.727445,"dec_deg":38.742055,"epoch_ra_deg":317.026872,"epoch_dec_deg":38.872857,"epoch_moved_arcsec":137.863,"pm_ra_mas_yr":4107.4,"pm_dec_mas_yr":3143.72,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cygnus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-201092","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"radius_solar":0.664,"spectral_type":"K7V","uncertainties":{"metallicity_fe_h":[0.232,0.232]},"color_index_bv":1.309,"luminosity_solar":0.04051352202292637,"metallicity_fe_h":-0.21,"radial_velocity_km_s":-64.3,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality B)","surface_gravity_log_g":4.548,"surface_temperature_k":3890,"metallicity_fe_h_source":"Median of 10 spectroscopic determinations in 15 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":4107.4,"proper_motion_dec_mas_yr":3143.72,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.0945},"designations":[{"catalog":"Gliese","designation":"Gl 820B"},{"catalog":"HD","designation":"HD 201092"},{"catalog":"HIP","designation":"HIP 104217"},{"catalog":"HR","designation":"HR 8086"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T16:03:54.983Z","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."}