{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.671","julian_year":2026.671,"time":"2026-09-02T22:16:42.068Z","years_from_j2000":26.671,"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-71030","name":"25 Cnc","class":"f5iiim_yellow_white_giant","category":"star","object_type":"F5IIIm? yellow-white giant","mag":6.11,"mag_band":"V","abs_mag":2.847,"abs_mag_band":"V","distance_ly":146.58707008825775,"distance_method":"parallax","ra_deg":126.45784500000002,"dec_deg":17.046267,"epoch_ra_deg":126.837468,"epoch_dec_deg":16.957762,"epoch_moved_arcsec":6.555,"pm_ra_mas_yr":-192.75,"pm_dec_mas_yr":-152.48,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Cancer","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-71030","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"08258+1703","age_years":2281771200,"companions":[{"measured":2015,"magnitude":14.09,"components":"AB","discoverer_code":"TOK 380","separation_arcsec":692.4,"position_angle_deg":302}],"mass_solar":1.454,"radius_solar":2.007,"spectral_type":"F5IIIm?","color_index_bv":0.448,"luminosity_solar":6.327031548665008,"radial_velocity_km_s":38,"spectral_type_source":"SIMBAD (1976PASP...88...95C, quality C)","surface_gravity_log_g":3.965,"surface_temperature_k":6475,"proper_motion_ra_mas_yr":-192.75,"proper_motion_dec_mas_yr":-152.48,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":6.2606},"designations":[{"catalog":"Bayer/Flamsteed","designation":"25 Cnc"},{"catalog":"HD","designation":"HD 71030"},{"catalog":"HIP","designation":"HIP 41319"},{"catalog":"HR","designation":"HR 3299"}],"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."}