{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.813","julian_year":2026.813,"time":"2026-10-24T23:19:08.132Z","years_from_j2000":26.813,"frame":"date","applied":"Proper motion, then precession and nutation. The catalogued position is carried along the great circle the object's own published motion puts it on, at a constant velocity, from the epoch that position was measured at, 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. The motion runs from position_epoch_jyear where the upstream publishes one — a timed pulsar's position belongs to the year it was timed — and from J2000 where it does not. 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-199345","name":"7 Aqr","class":"k4iii_orange_giant","category":"star","object_type":"K4III orange giant","mag":5.49,"mag_band":"V","abs_mag":-0.63,"abs_mag_band":"V","distance_ly":546.3256312434094,"distance_method":"parallax","ra_deg":314.22511499999996,"dec_deg":-9.697545,"epoch_ra_deg":314.589116,"epoch_dec_deg":-9.594147,"epoch_moved_arcsec":0.323,"pm_ra_mas_yr":-3.51,"pm_dec_mas_yr":-11.53,"position_epoch_jyear":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Aquarius","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/hd-199345","source":{"id":"hyg","name":"HYG Database v4.1","url":"https://github.com/astronexus/HYG-Database","license":"CC-BY-SA-4.0","attribution":"HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.","commercial_use":"allowed"},"radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"20569-0942","age_years":1260075100,"companions":[{"measured":2016,"magnitude":11.4,"components":"AB","discoverer_code":"BU 1034","separation_arcsec":2.2,"position_angle_deg":166},{"measured":2012,"magnitude":9.97,"components":"AC","discoverer_code":"BU 1034","separation_arcsec":177.8,"position_angle_deg":66}],"mass_solar":1.965,"radius_solar":45.342,"spectral_type":"K4III","color_index_bv":1.474,"luminosity_solar":155.59656316050734,"metallicity_fe_h":-0.17,"radial_velocity_km_s":-33,"spectral_type_source":"SIMBAD (1999MSS...C05....0H, quality C)","surface_gravity_log_g":0.994,"surface_temperature_k":4016,"metallicity_fe_h_source":"One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016)","proper_motion_ra_mas_yr":-3.51,"proper_motion_dec_mas_yr":-11.53,"stellar_parameters_method":"Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4)","bolometric_luminosity_solar":546.1762},"designations":[{"catalog":"Bayer/Flamsteed","designation":"7 Aqr"},{"catalog":"HD","designation":"HD 199345"},{"catalog":"HIP","designation":"HIP 103401"},{"catalog":"HR","designation":"HR 8015"}],"updated_at":"2026-10-01T09:42:28.932Z","citation":{"plain":"SpaceCatalog. 7 Aqr [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-199345","bibtex":"@misc{spacecatalog_hd-199345,\n  author       = {{SpaceCatalog}},\n  title        = {{7 Aqr}},\n  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},\n  year         = {2026},\n  url          = {https://spacecatalog.org/object/hd-199345},\n  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}\n}","url":"https://spacecatalog.org/object/hd-199345","release":"DR1","doi":null},"references":[{"bibcode":"1999MSS...C05....0H","ads_url":"https://ui.adsabs.harvard.edu/abs/1999MSS...C05....0H/abstract","quantity":"properties.spectral_type_source"}],"attribution":"Data from SpaceCatalog.org. Each record names its upstream in `source`, with that producer's terms in `source.license`, the acknowledgement it asks for in `source.attribution`, and whether its terms allow commercial use in `source.commercial_use`; those terms govern the record, and citing SpaceCatalog does not discharge them."}