{"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":"2026-09-03T06:16:13.835Z","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":"homam","name":"Homam","class":"b8_5iv_blue_white_subgiant","category":"star","object_type":"B8.5IV blue-white subgiant","mag":3.41,"mag_band":"V","abs_mag":-0.575,"abs_mag_band":"V","distance_ly":204.35849696046904,"distance_method":"parallax","ra_deg":340.365495,"dec_deg":10.831364,"epoch_ra_deg":340.700106,"epoch_dec_deg":10.971457,"epoch_moved_arcsec":2.085,"pm_ra_mas_yr":77.38,"pm_dec_mas_yr":-10.98,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Pegasus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/homam","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"22415+1050","companions":[{"measured":2014,"magnitude":11.6,"components":"AB","discoverer_code":"BU 1516","separation_arcsec":57,"position_angle_deg":145},{"measured":2014,"magnitude":13.4,"components":"AE","discoverer_code":"SMR   6","separation_arcsec":58.7,"position_angle_deg":128},{"measured":2014,"magnitude":12.13,"components":"AD","discoverer_code":"SMR   6","separation_arcsec":147.7,"position_angle_deg":165},{"measured":2014,"magnitude":12.09,"components":"AC","discoverer_code":"BU 1516","separation_arcsec":176,"position_angle_deg":8}],"spectral_type":"B8.5IV","color_index_bv":-0.086,"luminosity_solar":147.91083881682073,"radial_velocity_km_s":7,"spectral_type_source":"SIMBAD (2024A&A...690A.176N, quality C)","surface_temperature_k":11185,"proper_motion_ra_mas_yr":77.38,"proper_motion_dec_mas_yr":-10.98,"stellar_parameters_method":"Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016)"},"designations":[{"catalog":"Bayer/Flamsteed","designation":"42 Zeta Peg"},{"catalog":"Common name","designation":"Homam"},{"catalog":"HD","designation":"HD 214923"},{"catalog":"HIP","designation":"HIP 112029"},{"catalog":"HR","designation":"HR 8634"}],"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."}