{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.846","julian_year":2026.846,"time":"2026-11-05T21:25:17.262Z","years_from_j2000":26.846,"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-199618","name":"HD 199618","class":"k0iii_g_orange_giant","category":"star","object_type":"K0III+G orange giant","mag":7.36,"mag_band":"V","abs_mag":0.183,"abs_mag_band":"V","distance_ly":888.7095933770717,"distance_method":"parallax","ra_deg":314.8552863401515,"dec_deg":-30.510926,"epoch_ra_deg":315.264779,"epoch_dec_deg":-30.406119,"epoch_moved_arcsec":0.583,"pm_ra_mas_yr":16.23,"pm_dec_mas_yr":-14.44,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Microscopium","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-199618","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":"20594-3031","companions":[{"measured":2021,"magnitude":9.5,"components":null,"discoverer_code":"HDS2992","separation_arcsec":0.1,"position_angle_deg":242}],"spectral_type":"K0III+G","uncertainties":{"distance_ly":[165.52460308129344,263.7865582673616]},"color_index_bv":0.926,"luminosity_solar":73.58681396510448,"spectral_type_source":"SIMBAD (1982MSS...C03....0H, quality C)","proper_motion_ra_mas_yr":16.23,"proper_motion_dec_mas_yr":-14.44},"designations":[{"catalog":"HD","designation":"HD 199618"},{"catalog":"HIP","designation":"HIP 103597"}],"updated_at":"2026-11-04T19:31:31.075Z","citation":{"plain":"SpaceCatalog. HD 199618 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-199618","bibtex":"@misc{spacecatalog_hd-199618,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 199618}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-199618},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-199618","release":"DR1","doi":null},"references":[{"bibcode":"1982MSS...C03....0H","ads_url":"https://ui.adsabs.harvard.edu/abs/1982MSS...C03....0H/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."}