{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-03T02:29:46.099Z","years_from_j2000":26.671,"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-41847","name":"HIP 41847","class":"k6vk_orange_dwarf","category":"star","object_type":"K6Vk: orange dwarf","mag":10.78,"mag_band":"V","abs_mag":7.793,"abs_mag_band":"V","distance_ly":129.068558728336,"distance_method":"parallax","ra_deg":127.98465000000002,"dec_deg":-50.189084,"epoch_ra_deg":128.18325,"epoch_dec_deg":-50.277839,"epoch_moved_arcsec":7.991,"pm_ra_mas_yr":-202.55,"pm_dec_mas_yr":220.77,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Vela","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-41847","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":12301784000,"mass_solar":0.674,"radius_solar":0.661,"spectral_type":"K6Vk:","color_index_bv":1.21,"luminosity_solar":0.06649668571246753,"variable_mag_max":10.717,"variable_mag_min":10.827,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.629,"surface_temperature_k":4318,"proper_motion_ra_mas_yr":-202.55,"proper_motion_dec_mas_yr":220.77,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.1374},"designations":[{"catalog":"Gliese","designation":"Gl 308.3"},{"catalog":"HIP","designation":"HIP 41847"}],"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."}