{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.816","julian_year":2026.816,"time":"2026-10-26T04:19:37.875Z","years_from_j2000":26.816,"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-44171","name":"HD 44171","class":"b8iii_blue_white_giant","category":"star","object_type":"B8III blue-white giant","mag":7.34,"mag_band":"V","abs_mag":0.004,"abs_mag_band":"V","distance_ly":956.4702116296137,"distance_method":"parallax","ra_deg":95.31033,"dec_deg":21.132435,"epoch_ra_deg":95.713684,"epoch_dec_deg":21.120187,"epoch_moved_arcsec":0.119,"pm_ra_mas_yr":-4.43,"pm_dec_mas_yr":0.25,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Gemini","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-44171","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":"06212+2108","companions":[{"measured":2022,"magnitude":12.01,"components":"AC","discoverer_code":"S   513","separation_arcsec":47.3,"position_angle_deg":250},{"measured":2022,"magnitude":8.92,"components":"AB","discoverer_code":"S   513","separation_arcsec":59.3,"position_angle_deg":259},{"measured":2016,"magnitude":11.27,"components":"AE","discoverer_code":"S   513","separation_arcsec":83.8,"position_angle_deg":285},{"measured":2016,"magnitude":14.7,"components":"AH","discoverer_code":"JRN  26","separation_arcsec":117.8,"position_angle_deg":299},{"measured":2016,"magnitude":14.21,"components":"AI","discoverer_code":"JRN  26","separation_arcsec":140.6,"position_angle_deg":302},{"measured":2016,"magnitude":14.71,"components":"AJ","discoverer_code":"JRN  26","separation_arcsec":166.5,"position_angle_deg":289},{"measured":2015,"magnitude":12.32,"components":"AK","discoverer_code":"JRN  26","separation_arcsec":250.7,"position_angle_deg":297},{"measured":2015,"magnitude":7.61,"components":"AD","discoverer_code":"S   513","separation_arcsec":264.9,"position_angle_deg":24},{"measured":2016,"magnitude":11.24,"components":"AM","discoverer_code":"JRN  26","separation_arcsec":272.6,"position_angle_deg":290},{"measured":2016,"magnitude":12.95,"components":"AL","discoverer_code":"JRN  26","separation_arcsec":291.4,"position_angle_deg":302},{"measured":2016,"magnitude":13.48,"components":"AQ","discoverer_code":"JRN  26","separation_arcsec":293,"position_angle_deg":271},{"measured":2016,"magnitude":14.21,"components":"AO","discoverer_code":"JRN  26","separation_arcsec":293.6,"position_angle_deg":283},{"measured":2016,"magnitude":14.55,"components":"AN","discoverer_code":"JRN  26","separation_arcsec":294.5,"position_angle_deg":291},{"measured":2016,"magnitude":15.06,"components":"AP","discoverer_code":"JRN  26","separation_arcsec":313.2,"position_angle_deg":291}],"spectral_type":"B8III","color_index_bv":-0.08,"luminosity_solar":86.77607449911467,"radial_velocity_km_s":0,"spectral_type_source":"SIMBAD (quality D)","proper_motion_ra_mas_yr":-4.43,"proper_motion_dec_mas_yr":0.25},"designations":[{"catalog":"HD","designation":"HD 44171"},{"catalog":"HIP","designation":"HIP 30202"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HD 44171 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-44171","bibtex":"@misc{spacecatalog_hd-44171,\n  author       = {{SpaceCatalog}},\n  title        = {{HD 44171}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-44171},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-44171","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."}