{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.678","julian_year":2026.678,"time":"2026-09-05T11:06:18.343Z","years_from_j2000":26.678,"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-11763","name":"7 Ari","class":"g8iii_yellow_giant","category":"star","object_type":"G8III yellow giant","mag":5.76,"mag_band":"V","abs_mag":-0.404,"abs_mag_band":"V","distance_ly":557.5323643817567,"distance_method":"parallax","ra_deg":28.96266,"dec_deg":23.577322,"epoch_ra_deg":29.33792,"epoch_dec_deg":23.708965,"epoch_moved_arcsec":0.4,"pm_ra_mas_yr":12.06,"pm_dec_mas_yr":-8.88,"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-11763","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"spectral_type":"G8III","color_index_bv":1.185,"luminosity_solar":126.35720185226539,"variability_type":"CST:","variable_mag_max":5.752,"variable_mag_min":5.772,"variability_class":"Not variable (GCVS)","radial_velocity_km_s":14,"spectral_type_source":"SIMBAD (quality D)","variable_designation":"RR Ari","proper_motion_ra_mas_yr":12.06,"proper_motion_dec_mas_yr":-8.88},"designations":[{"catalog":"Bayer/Flamsteed","designation":"7 Ari"},{"catalog":"HD","designation":"HD 11763"},{"catalog":"HIP","designation":"HIP 8993"},{"catalog":"HR","designation":"HR 559"},{"catalog":"Variable star","designation":"RR Ari"}],"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."}