{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T17:25:46.813Z","years_from_j2000":26.675,"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-105707","name":"2 ε Crv","class":"k2_iiia_orange_star","category":"star","object_type":"K2+IIIa orange star","mag":3.02,"mag_band":"V","abs_mag":-1.924,"abs_mag_band":"V","distance_ly":317.89124894902346,"distance_method":"parallax","ra_deg":182.53119,"dec_deg":-22.619766,"epoch_ra_deg":182.876719,"epoch_dec_deg":-22.769146,"epoch_moved_arcsec":1.928,"pm_ra_mas_yr":-71.52,"pm_dec_mas_yr":10.55,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Corvus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-105707","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"K2+IIIa","uncertainties":{"metallicity_fe_h":[0.082,0.082]},"color_index_bv":1.326,"luminosity_solar":512.3892386646796,"metallicity_fe_h":-0.13,"radial_velocity_km_s":5,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":2.16,"surface_temperature_k":4320,"metallicity_fe_h_source":"Median of 3 spectroscopic determinations in 3 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-71.52,"proper_motion_dec_mas_yr":10.55,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"2 Epsilon Crv"},{"catalog":"HD","designation":"HD 105707"},{"catalog":"HIP","designation":"HIP 59316"},{"catalog":"HR","designation":"HR 4630"}],"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."}