{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.830","julian_year":2026.83,"time":"2026-10-31T04:41:35.713Z","years_from_j2000":26.83,"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-88435","name":"HIP 88435","class":"star","category":"star","object_type":null,"mag":11.21,"mag_band":"V","abs_mag":7.523,"abs_mag_band":"V","distance_ly":178.13030568999943,"distance_method":"parallax","ra_deg":270.837585,"dec_deg":84.147741,"epoch_ra_deg":269.70842,"epoch_dec_deg":84.147381,"epoch_moved_arcsec":4.984,"pm_ra_mas_yr":-120.45,"pm_dec_mas_yr":141.44,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Draco","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hip-88435","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":"18039+8409","age_years":6225791000,"companions":[{"measured":2015,"magnitude":17.7,"components":null,"discoverer_code":"LDS1883","separation_arcsec":32,"position_angle_deg":161}],"mass_solar":0.75,"radius_solar":0.717,"luminosity_solar":0.08527073373436284,"variable_mag_max":11.112,"variable_mag_min":11.282,"radial_velocity_km_s":0,"surface_gravity_log_g":4.605,"surface_temperature_k":4662,"proper_motion_ra_mas_yr":-120.45,"proper_motion_dec_mas_yr":141.44,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":0.2139},"designations":[{"catalog":"HIP","designation":"HIP 88435"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. HIP 88435 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-88435","bibtex":"@misc{spacecatalog_hip-88435,\n  author       = {{SpaceCatalog}},\n  title        = {{HIP 88435}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hip-88435},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hip-88435","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."}