{"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":"2026-08-27T17:48:30.810Z","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-67228","name":"10 μ² Cnc","class":"g1ivb_yellow_subgiant","category":"star","object_type":"G1IVb yellow subgiant","mag":5.3,"mag_band":"V","abs_mag":3.464,"abs_mag_band":"V","distance_ly":75.95627571180836,"distance_method":"parallax","ra_deg":121.94106,"dec_deg":21.581816,"epoch_ra_deg":122.335629,"epoch_dec_deg":21.503776,"epoch_moved_arcsec":1.895,"pm_ra_mas_yr":23.08,"pm_dec_mas_yr":-67.23,"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-67228","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"age_years":5939641000,"mass_solar":1.166,"radius_solar":1.933,"spectral_type":"G1IVb","color_index_bv":0.642,"luminosity_solar":3.5842640804371437,"radial_velocity_km_s":-36,"spectral_type_source":"SIMBAD (1989ApJS...71..245K, quality C)","surface_gravity_log_g":3.923,"surface_temperature_k":5898,"proper_motion_ra_mas_yr":23.08,"proper_motion_dec_mas_yr":-67.23,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":3.6538},"designations":[{"catalog":"Bayer/Flamsteed","designation":"10 Mu2 Cnc"},{"catalog":"HD","designation":"HD 67228"},{"catalog":"HIP","designation":"HIP 39780"},{"catalog":"HR","designation":"HR 3176"}],"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."}