{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.854","julian_year":2026.854,"time":"2026-11-08T20:35:17.925Z","years_from_j2000":26.854,"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-71841","name":"HIP 71841","class":"kwl_orange_star","category":"star","object_type":"Kwl orange star","mag":10.7,"mag_band":"V","abs_mag":0.154,"abs_mag_band":"V","distance_ly":4194.42943917918,"distance_method":"parallax (Gaia DR3, zero point corrected)","ra_deg":220.43632366520728,"dec_deg":-42.684093,"epoch_ra_deg":220.871268,"epoch_dec_deg":-42.799528,"epoch_moved_arcsec":0.501,"pm_ra_mas_yr":-18.65,"pm_dec_mas_yr":0.73,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Lupus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-71841","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":"Kwl","uncertainties":{"distance_ly":[86.44898930184426,90.16569664310234]},"luminosity_solar":75.59516778987005,"variable_mag_max":10.64,"variable_mag_min":10.75,"spectral_type_source":"SIMBAD (1972POAN....2...59S, quality E)","proper_motion_ra_mas_yr":-18.65,"proper_motion_dec_mas_yr":0.73},"designations":[{"catalog":"HIP","designation":"HIP 71841"}],"updated_at":"2026-11-04T19:31:31.075Z","citation":{"plain":"SpaceCatalog. HIP 71841 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-71841","bibtex":"@misc{spacecatalog_hip-71841,\n  author       = {{SpaceCatalog}},\n  title        = {{HIP 71841}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hip-71841},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hip-71841","release":"DR1","doi":null},"references":[{"bibcode":"1972POAN....2...59S","ads_url":"https://ui.adsabs.harvard.edu/abs/1972POAN....2...59S/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."}