{"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":"2026-09-05T14:58:24.146Z","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-61064","name":"25 Mon","class":"f6iii_yellow_white_giant","category":"star","object_type":"F6III yellow-white giant","mag":5.14,"mag_band":"V","abs_mag":0.993,"abs_mag_band":"V","distance_ly":220.22698320552178,"distance_method":"parallax","ra_deg":114.319545,"dec_deg":-4.110979,"epoch_ra_deg":114.653282,"epoch_dec_deg":-4.170744,"epoch_moved_arcsec":1.86,"pm_ra_mas_yr":-67.41,"pm_dec_mas_yr":17.74,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Monoceros","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-61064","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"07373-0407","age_years":1016917200,"companions":[{"measured":2000,"magnitude":13.2,"components":"AB","discoverer_code":"BUP 104","separation_arcsec":22.5,"position_angle_deg":262},{"measured":2007,"magnitude":10.45,"components":"AC","discoverer_code":"ENG  32","separation_arcsec":119.3,"position_angle_deg":353}],"mass_solar":2.062,"radius_solar":4.174,"spectral_type":"F6III","color_index_bv":0.442,"luminosity_solar":34.89795674378744,"metallicity_fe_h":0.44,"radial_velocity_km_s":46,"spectral_type_source":"SIMBAD (1972AJ.....77...35M, quality B)","surface_gravity_log_g":3.494,"surface_temperature_k":6393,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-67.41,"proper_motion_dec_mas_yr":17.74,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":27.9267},"designations":[{"catalog":"Bayer/Flamsteed","designation":"25 Mon"},{"catalog":"HD","designation":"HD 61064"},{"catalog":"HIP","designation":"HIP 37088"},{"catalog":"HR","designation":"HR 2927"}],"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."}