{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T17:50:50.583Z","years_from_j2000":26.678,"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-196067","name":"μ² Oct","class":"g0v_yellow_main_sequence_star","category":"star","object_type":"G0V yellow main-sequence star","mag":6.51,"mag_band":"V","abs_mag":3.28,"abs_mag_band":"V","distance_ly":144.38094834938167,"distance_method":"parallax","ra_deg":310.43262,"dec_deg":-75.350803,"epoch_ra_deg":311.218369,"epoch_dec_deg":-75.255963,"epoch_moved_arcsec":5.906,"pm_ra_mas_yr":151.42,"pm_dec_mas_yr":-161.48,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Octans","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-196067","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20417-7521","age_years":6550504000,"companions":[{"measured":2023,"magnitude":7.07,"components":null,"discoverer_code":"DUN 232","separation_arcsec":16.7,"position_angle_deg":20}],"mass_solar":1.139,"radius_solar":1.801,"spectral_type":"G0V","uncertainties":{"metallicity_fe_h":[0.02,0.02]},"color_index_bv":0.62,"luminosity_solar":4.246195639463127,"metallicity_fe_h":0.23,"variable_mag_max":6.365,"variable_mag_min":6.725,"radial_velocity_km_s":-13,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.088,"surface_temperature_k":5845,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":151.42,"proper_motion_dec_mas_yr":-161.48,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":3.3867},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Mu2 Oct"},{"catalog":"HD","designation":"HD 196067"},{"catalog":"HIP","designation":"HIP 102125"},{"catalog":"HR","designation":"HR 7864"}],"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."}