{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.665","julian_year":2026.665,"time":"2026-08-31T22:27:35.207Z","years_from_j2000":26.665,"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-40501","name":"HIP 40501","class":"m2_0v_red_dwarf","category":"star","object_type":"M2.0V red dwarf","mag":10.08,"mag_band":"V","abs_mag":10.279,"abs_mag_band":"V","distance_ly":29.753289400832205,"distance_method":"parallax","ra_deg":124.03326,"dec_deg":1.302573,"epoch_ra_deg":124.377207,"epoch_dec_deg":1.220922,"epoch_moved_arcsec":10.127,"pm_ra_mas_yr":-375.01,"pm_dec_mas_yr":60.11,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Hydra","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-40501","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"radius_solar":0.516,"spectral_type":"M2.0V","color_index_bv":1.51,"luminosity_solar":0.006735967762229425,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (2015A&A...577A.128A, quality C)","surface_gravity_log_g":3.968,"surface_temperature_k":3286,"proper_motion_ra_mas_yr":-375.01,"proper_motion_dec_mas_yr":60.11,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.0272},"designations":[{"catalog":"Gliese","designation":"GJ 2066"},{"catalog":"HIP","designation":"HIP 40501"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-30T09:56:50.739Z","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."}