{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.654","julian_year":2026.654,"time":"2026-08-27T17:05:51.522Z","years_from_j2000":26.654,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued J2000 position is carried along the great circle the object's own published motion puts it on, at a constant velocity, 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. 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-9766","name":"101 Psc","class":"b9_5iii_blue_white_giant","category":"star","object_type":"B9.5III blue-white giant","mag":6.23,"mag_band":"V","abs_mag":-2.159,"abs_mag_band":"V","distance_ly":1553.125685831249,"distance_method":"parallax","ra_deg":23.94351,"dec_deg":14.661422,"epoch_ra_deg":24.302986,"epoch_dec_deg":14.798703,"epoch_moved_arcsec":0.228,"pm_ra_mas_yr":3.89,"pm_dec_mas_yr":-7.61,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pisces","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-9766","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"01358+1440","companions":[{"measured":1990,"magnitude":7,"components":null,"discoverer_code":"OCC 803","separation_arcsec":0.1,"position_angle_deg":-1}],"spectral_type":"B9.5III","color_index_bv":-0.036,"luminosity_solar":636.2092805735178,"radial_velocity_km_s":-16,"spectral_type_source":"SIMBAD (quality C)","surface_gravity_log_g":2.91,"surface_temperature_k":10651,"proper_motion_ra_mas_yr":3.89,"proper_motion_dec_mas_yr":-7.61,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"101 Psc"},{"catalog":"HD","designation":"HD 9766"},{"catalog":"HIP","designation":"HIP 7436"},{"catalog":"HR","designation":"HR 455"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-08-27T16:03:54.983Z","attribution":"Data from SpaceCatalog.org. Individual records carry their source and license in `source`; attribution is required for CC-BY and CC-BY-SA rows."}