{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.679","julian_year":2026.679,"time":"2026-09-06T03:34:48.517Z","years_from_j2000":26.679,"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-27442","name":"ε Ret","class":"k2iii_orange_giant","category":"star","object_type":"K2III orange giant","mag":4.44,"mag_band":"V","abs_mag":3.135,"abs_mag_band":"V","distance_ly":59.48505248073509,"distance_method":"parallax","ra_deg":64.12107,"dec_deg":-59.302156,"epoch_ra_deg":64.239785,"epoch_dec_deg":-59.236202,"epoch_moved_arcsec":4.657,"pm_ra_mas_yr":-47.99,"pm_dec_mas_yr":-167.81,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Reticulum","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-27442","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04165-5918","companions":[{"measured":2015,"magnitude":12.5,"components":null,"discoverer_code":"JSP  56","separation_arcsec":13,"position_angle_deg":37}],"spectral_type":"K2III","uncertainties":{"metallicity_fe_h":[0.088,0.088]},"color_index_bv":1.078,"luminosity_solar":4.8528850016212095,"metallicity_fe_h":0.36,"radial_velocity_km_s":29.3,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":3.52,"surface_temperature_k":4789,"metallicity_fe_h_source":"Median of 10 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":-47.99,"proper_motion_dec_mas_yr":-167.81,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Epsilon Ret"},{"catalog":"Gliese","designation":"Gl 167.3"},{"catalog":"HD","designation":"HD 27442"},{"catalog":"HIP","designation":"HIP 19921"},{"catalog":"HR","designation":"HR 1355"}],"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."}