{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.832","julian_year":2026.832,"time":"2026-10-31T20:19:46.084Z","years_from_j2000":26.832,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, 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. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. 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-13043","name":"HD 13043","class":"g2v_yellow_main_sequence_star","category":"star","object_type":"G2V yellow main-sequence star","mag":6.88,"mag_band":"V","abs_mag":4.042,"abs_mag_band":"V","distance_ly":120.53076322884482,"distance_method":"parallax","ra_deg":31.892804999999996,"dec_deg":-0.617418,"epoch_ra_deg":32.236045,"epoch_dec_deg":-0.491506,"epoch_moved_arcsec":11.41,"pm_ra_mas_yr":-249.84,"pm_dec_mas_yr":-344.12,"position_epoch_jyear":null,"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-13043","source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0","attribution":"HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02076-0037","age_years":9664985000,"companions":[{"measured":2016,"magnitude":10.45,"components":null,"discoverer_code":"LDS3346","separation_arcsec":79.2,"position_angle_deg":338}],"mass_solar":1.018,"radius_solar":1.447,"spectral_type":"G2V","uncertainties":{"metallicity_fe_h":[0.032,0.032]},"color_index_bv":0.624,"luminosity_solar":2.1047474886559754,"metallicity_fe_h":0.085,"radial_velocity_km_s":-40.2,"spectral_type_source":"SIMBAD (1974AJ.....79..682H, quality C)","surface_gravity_log_g":4.058,"surface_temperature_k":5762,"metallicity_fe_h_source":"Median of 8 spectroscopic determinations in 9 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them","proper_motion_ra_mas_yr":-249.84,"proper_motion_dec_mas_yr":-344.12,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: Gaia's classifier calls the source a binary, which GSP-Phot fitted as one star","bolometric_luminosity_solar":2.0589},"designations":[{"catalog":"Gliese","designation":"GJ 9073A"},{"catalog":"HD","designation":"HD 13043"},{"catalog":"HIP","designation":"HIP 9911"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 13043 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-13043","bibtex":"@misc{spacecatalog_hd-13043,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 13043}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-13043},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-13043","release":"DR1","doi":null},"references":[{"bibcode":"1974AJ.....79..682H","ads_url":"https://ui.adsabs.harvard.edu/abs/1974AJ.....79..682H/abstract","quantity":"properties.spectral_type_source"}],"attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}