{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.668","julian_year":2026.668,"time":"2026-09-01T23:22:10.443Z","years_from_j2000":26.668,"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":"nenque","name":"Nenque","class":"g2_3v_yellow_main_sequence_star","category":"star","object_type":"G2/3V yellow main-sequence star","mag":7.72,"mag_band":"V","abs_mag":4.636,"abs_mag_band":"V","distance_ly":134.94263509101455,"distance_method":"parallax","ra_deg":16.16742,"dec_deg":-39.488217,"epoch_ra_deg":16.477089,"epoch_dec_deg":-39.348034,"epoch_moved_arcsec":14.777,"pm_ra_mas_yr":-168.97,"pm_dec_mas_yr":-527.71,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Phoenix","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/nenque","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":8524499000,"mass_solar":0.984,"radius_solar":1.134,"spectral_type":"G2/3V","uncertainties":{"metallicity_fe_h":[0.074,0.074]},"color_index_bv":0.613,"luminosity_solar":1.217867384891259,"metallicity_fe_h":-0.54,"radial_velocity_km_s":22.4,"spectral_type_source":"SIMBAD (2007AJ....133.2524W, quality C)","surface_gravity_log_g":4.306,"surface_temperature_k":5777,"metallicity_fe_h_source":"Median of 11 spectroscopic determinations in 13 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-168.97,"proper_motion_dec_mas_yr":-527.71,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1.2888},"designations":[{"catalog":"Common name","designation":"Nenque"},{"catalog":"Gliese","designation":"GJ 9037"},{"catalog":"HD","designation":"HD 6434"},{"catalog":"HIP","designation":"HIP 5054"}],"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."}