{"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":"2026-09-05T16:02:09.185Z","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":"hip-40068","name":"HIP 40068","class":"g0_yellow_star","category":"star","object_type":"G0 yellow star","mag":10.01,"mag_band":"V","abs_mag":3.492,"abs_mag_band":"V","distance_ly":656.2501152252834,"distance_method":"parallax","ra_deg":122.77443000000001,"dec_deg":79.908212,"epoch_ra_deg":123.830586,"epoch_dec_deg":79.825294,"epoch_moved_arcsec":10.441,"pm_ra_mas_yr":136.81,"pm_dec_mas_yr":-366.66,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Camelopardalis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-40068","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08110+7955","age_years":3778283800,"companions":[{"measured":2016,"magnitude":17.1,"components":"AD","discoverer_code":"OSO  21","separation_arcsec":20.4,"position_angle_deg":303},{"measured":2015,"magnitude":14.5,"components":"AB","discoverer_code":"LDS1668","separation_arcsec":110.6,"position_angle_deg":208},{"measured":2016,"magnitude":12.9,"components":"AC","discoverer_code":"PWS   3","separation_arcsec":127.1,"position_angle_deg":326}],"mass_solar":1.331,"radius_solar":2.284,"spectral_type":"G0","uncertainties":{"metallicity_fe_h":[0.186,0.186]},"color_index_bv":0.564,"luminosity_solar":3.4930113756355423,"metallicity_fe_h":-1.81,"variable_mag_max":9.947,"variable_mag_min":10.067,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2007MNRAS.374..664C, quality D)","surface_gravity_log_g":3.662,"surface_temperature_k":5955,"metallicity_fe_h_source":"Median of 6 spectroscopic determinations in 10 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":136.81,"proper_motion_dec_mas_yr":-366.66,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":6.0937},"designations":[{"catalog":"HIP","designation":"HIP 40068"}],"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."}