{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.669","julian_year":2026.669,"time":"2026-09-02T06:15:33.900Z","years_from_j2000":26.669,"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-3795","name":"HD 3795","class":"k0vfe_1_5ch_1_3_orange_dwarf","category":"star","object_type":"K0VFe-1.5CH-1.3 orange dwarf","mag":6.14,"mag_band":"V","abs_mag":3.837,"abs_mag_band":"V","distance_ly":94.21026970348134,"distance_method":"parallax","ra_deg":10.136565000000001,"dec_deg":-23.804876,"epoch_ra_deg":10.474952,"epoch_dec_deg":-23.660097,"epoch_moved_arcsec":19.521,"pm_ra_mas_yr":635.49,"pm_dec_mas_yr":-363.28,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cetus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-3795","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K0VFe-1.5CH-1.3","uncertainties":{"metallicity_fe_h":[0.062,0.062]},"color_index_bv":0.718,"luminosity_solar":2.5421431362049387,"metallicity_fe_h":-0.59,"radial_velocity_km_s":-50.4,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":3.89,"surface_temperature_k":5377,"metallicity_fe_h_source":"Median of 14 spectroscopic determinations in 16 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":635.49,"proper_motion_dec_mas_yr":-363.28,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Gliese","designation":"Gl 27.2"},{"catalog":"HD","designation":"HD 3795"},{"catalog":"HIP","designation":"HIP 3185"},{"catalog":"HR","designation":"HR 173"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-01T22:58:55.274Z","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."}