{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.672","julian_year":2026.672,"time":"2026-09-03T09:36:57.654Z","years_from_j2000":26.672,"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-84708","name":"HIP 84708","class":"gp_yellow_star","category":"star","object_type":"Gp yellow star","mag":12.19,"mag_band":"V","abs_mag":null,"abs_mag_band":null,"distance_ly":null,"distance_method":null,"ra_deg":259.733205,"dec_deg":-70.812997,"epoch_ra_deg":260.499848,"epoch_dec_deg":-70.84084,"epoch_moved_arcsec":0.361,"pm_ra_mas_yr":8.42,"pm_dec_mas_yr":10.6,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Apus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-84708","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"17189-7049","companions":[{"measured":2015,"magnitude":13,"components":"AB","discoverer_code":"CRI  17","separation_arcsec":13.8,"position_angle_deg":3}],"mass_solar":0.938,"radius_solar":1.367,"spectral_type":"Gp","variable_mag_max":11.935,"variable_mag_min":12.505,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","surface_gravity_log_g":4.241,"surface_temperature_k":5565,"proper_motion_ra_mas_yr":8.42,"proper_motion_dec_mas_yr":10.6,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1.6456},"designations":[{"catalog":"HIP","designation":"HIP 84708"}],"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."}