{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.823","julian_year":2026.823,"time":"2026-10-28T13:58:37.687Z","years_from_j2000":26.823,"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-116491","name":"HIP 116491","class":"m0v_red_dwarf","category":"star","object_type":"M0V red dwarf","mag":10.09,"mag_band":"V","abs_mag":8.279,"abs_mag_band":"V","distance_ly":75.09946290754648,"distance_method":"parallax","ra_deg":354.076305,"dec_deg":-48.588072,"epoch_ra_deg":354.439953,"epoch_dec_deg":-48.439037,"epoch_moved_arcsec":3.436,"pm_ra_mas_yr":-125.61,"pm_dec_mas_yr":-25.11,"position_epoch_jyear":null,"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/hip-116491","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":"23363-4835","companions":[{"measured":2016,"magnitude":12.45,"components":"AB","discoverer_code":"LDS 819","separation_arcsec":28.9,"position_angle_deg":304},{"measured":2016,"magnitude":14.9,"components":"AC","discoverer_code":"GAT  32","separation_arcsec":322.9,"position_angle_deg":329}],"spectral_type":"M0V","color_index_bv":1.37,"luminosity_solar":0.04250108331760469,"variable_mag_max":10.028,"variable_mag_min":10.158,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (1974PhDT........10S, quality C)","proper_motion_ra_mas_yr":-125.61,"proper_motion_dec_mas_yr":-25.11},"designations":[{"catalog":"Gliese","designation":"GJ 4347"},{"catalog":"HIP","designation":"HIP 116491"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HIP 116491 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-116491","bibtex":"@misc{spacecatalog_hip-116491,\n  author       = {{SpaceCatalog}},\n  title        = {{HIP 116491}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hip-116491},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hip-116491","release":"DR1","doi":null},"references":[{"bibcode":"1974PhDT........10S","ads_url":"https://ui.adsabs.harvard.edu/abs/1974PhDT........10S/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."}