{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.817","julian_year":2026.817,"time":"2026-10-26T07:46:54.405Z","years_from_j2000":26.817,"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":"gliese-gj-9125","name":"GJ 9125","class":"g0_yellow_star","category":"star","object_type":"G0 yellow star","mag":10.81,"mag_band":"V","abs_mag":9.239,"abs_mag_band":"V","distance_ly":67.24887889590445,"distance_method":"parallax","ra_deg":56.06616,"dec_deg":24.784386,"epoch_ra_deg":56.469039,"epoch_dec_deg":24.869219,"epoch_moved_arcsec":1.341,"pm_ra_mas_yr":12.94,"pm_dec_mas_yr":-48.3,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/gliese-gj-9125","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":{"spectral_type":"G0","color_index_bv":0.7,"luminosity_solar":0.01755496629621232,"radial_velocity_km_s":0,"proper_motion_ra_mas_yr":12.94,"proper_motion_dec_mas_yr":-48.3},"designations":[{"catalog":"Gliese","designation":"GJ 9125"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. GJ 9125 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/gliese-gj-9125","bibtex":"@misc{spacecatalog_gliese-gj-9125,\n  author       = {{SpaceCatalog}},\n  title        = {{GJ 9125}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/gliese-gj-9125},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/gliese-gj-9125","release":"DR1","doi":null},"references":[],"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."}