{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.813","julian_year":2026.813,"time":"2026-10-24T20:59:05.717Z","years_from_j2000":26.813,"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":"hip-40488","name":"HIP 40488","class":"f8_yellow_white_star","category":"star","object_type":"F8 yellow-white star","mag":9.38,"mag_band":"V","abs_mag":2.997,"abs_mag_band":"V","distance_ly":616.5526440242454,"distance_method":"parallax","ra_deg":123.99784499999998,"dec_deg":40.561147,"epoch_ra_deg":124.450362,"epoch_dec_deg":40.478241,"epoch_moved_arcsec":1.144,"pm_ra_mas_yr":-17.93,"pm_dec_mas_yr":-38.7,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lynx","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-40488","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":"08160+4034","age_years":2636596700,"companions":[{"measured":2016,"magnitude":12.38,"components":"AB","discoverer_code":"ES 1540","separation_arcsec":7.2,"position_angle_deg":4},{"measured":2015,"magnitude":12.46,"components":"AC","discoverer_code":"SIN  37","separation_arcsec":38.6,"position_angle_deg":182},{"measured":2015,"magnitude":14,"components":"AD","discoverer_code":"SIN  37","separation_arcsec":174.7,"position_angle_deg":76}],"mass_solar":1.503,"radius_solar":2.527,"spectral_type":"F8","color_index_bv":0.564,"luminosity_solar":5.510614111390657,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","surface_gravity_log_g":3.758,"surface_temperature_k":6088,"proper_motion_ra_mas_yr":-17.93,"proper_motion_dec_mas_yr":-38.7,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":8.1768},"designations":[{"catalog":"HIP","designation":"HIP 40488"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HIP 40488 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-40488","bibtex":"@misc{spacecatalog_hip-40488,\n  author       = {{SpaceCatalog}},\n  title        = {{HIP 40488}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hip-40488},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hip-40488","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."}