{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.675","julian_year":2026.675,"time":"2026-09-04T14:32:34.079Z","years_from_j2000":26.675,"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-12885","name":"11 Ari","class":"b9iv_vn_blue_white_subgiant","category":"star","object_type":"B9IV-Vn blue-white subgiant","mag":6.01,"mag_band":"V","abs_mag":-1.137,"abs_mag_band":"V","distance_ly":876.7644421995736,"distance_method":"parallax","ra_deg":31.70514,"dec_deg":25.704553,"epoch_ra_deg":32.086595,"epoch_dec_deg":25.832593,"epoch_moved_arcsec":0.629,"pm_ra_mas_yr":18.57,"pm_dec_mas_yr":-14.54,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aries","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-12885","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02068+2542","companions":[{"measured":2021,"magnitude":11.5,"components":"AB","discoverer_code":"HO  312","separation_arcsec":1.8,"position_angle_deg":343}],"spectral_type":"B9IV-Vn","color_index_bv":-0.03,"luminosity_solar":248.19898435070957,"radial_velocity_km_s":-9,"spectral_type_source":"SIMBAD (1972AJ.....77..750C, quality C)","surface_temperature_k":11220,"proper_motion_ra_mas_yr":18.57,"proper_motion_dec_mas_yr":-14.54,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"11 Ari"},{"catalog":"HD","designation":"HD 12885"},{"catalog":"HIP","designation":"HIP 9859"},{"catalog":"HR","designation":"HR 615"}],"source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0"},"updated_at":"2026-09-02T19:50:56.720Z","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."}