{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.673","julian_year":2026.673,"time":"2026-09-03T19:26:12.904Z","years_from_j2000":26.673,"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-14228","name":"φ Eri","class":"b8iv_blue_white_subgiant","category":"star","object_type":"B8IV blue-white subgiant","mag":3.56,"mag_band":"V","abs_mag":0.194,"abs_mag_band":"V","distance_ly":153.7024976245262,"distance_method":"parallax","ra_deg":34.12731,"dec_deg":-51.512165,"epoch_ra_deg":34.369251,"epoch_dec_deg":-51.387463,"epoch_moved_arcsec":2.49,"pm_ra_mas_yr":90.75,"pm_dec_mas_yr":-21.9,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Eridanus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-14228","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"02165-5131","companions":[{"measured":2015,"magnitude":9.32,"components":"AB","discoverer_code":"DUN   6","separation_arcsec":89.1,"position_angle_deg":224}],"spectral_type":"B8IV","color_index_bv":-0.12,"luminosity_solar":72.84504232923301,"radial_velocity_km_s":10,"spectral_type_source":"SIMBAD (1994AJ....107.1556G, quality C)","surface_temperature_k":13325,"proper_motion_ra_mas_yr":90.75,"proper_motion_dec_mas_yr":-21.9,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"Phi Eri"},{"catalog":"HD","designation":"HD 14228"},{"catalog":"HIP","designation":"HIP 10602"},{"catalog":"HR","designation":"HR 674"}],"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."}