{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.810","julian_year":2026.81,"time":"2026-10-23T22:31:19.000Z","years_from_j2000":26.81,"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-67458","name":"HD 67458","class":"g0v_yellow_main_sequence_star","category":"star","object_type":"G0V yellow main-sequence star","mag":6.8,"mag_band":"V","abs_mag":4.81,"abs_mag_band":"V","distance_ly":81.559642280982,"distance_method":"parallax","ra_deg":121.75206,"dec_deg":-29.402937,"epoch_ra_deg":122.027873,"epoch_dec_deg":-29.483014,"epoch_moved_arcsec":13.165,"pm_ra_mas_yr":339.59,"pm_dec_mas_yr":-354.69,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Puppis","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-67458","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":"08070-2924","age_years":4959690600,"companions":[{"measured":2016,"magnitude":15,"components":null,"discoverer_code":"SKF1449","separation_arcsec":8.8,"position_angle_deg":43}],"mass_solar":1.006,"radius_solar":1.025,"spectral_type":"G0V","uncertainties":{"metallicity_fe_h":[0.042,0.042]},"color_index_bv":0.6,"luminosity_solar":1.0375284158180118,"metallicity_fe_h":-0.15,"radial_velocity_km_s":-17.6,"spectral_type_source":"SIMBAD (2006AJ....132..161G, quality C)","surface_gravity_log_g":4.332,"surface_temperature_k":5802,"metallicity_fe_h_source":"Median of 9 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":339.59,"proper_motion_dec_mas_yr":-354.69,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":1.0708},"designations":[{"catalog":"Gliese","designation":"Gl 296.1"},{"catalog":"HD","designation":"HD 67458"},{"catalog":"HIP","designation":"HIP 39710"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 67458 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-67458","bibtex":"@misc{spacecatalog_hd-67458,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 67458}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-67458},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-67458","release":"DR1","doi":null},"references":[{"bibcode":"2006AJ....132..161G","ads_url":"https://ui.adsabs.harvard.edu/abs/2006AJ....132..161G/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."}