{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.684","julian_year":2026.684,"time":"2026-09-07T23:11:27.690Z","years_from_j2000":26.684,"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":"2mass-j04414489-2301513","name":"2MASS J04414489+2301513","class":"m8_5_red_star","category":"star","object_type":"M8.5 red star","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":392.77051377081943,"distance_method":"NASA Exoplanet Archive sy_dist (Gaia DR2, 2018A&A...616A...1G)","ra_deg":70.4371079,"dec_deg":23.0308544,"epoch_ra_deg":70.841128,"epoch_dec_deg":23.082622,"epoch_moved_arcsec":null,"pm_ra_mas_yr":null,"pm_dec_mas_yr":null,"orbits":null,"semi_major_axis_km":null,"periapsis_km":null,"mass_kg":null,"mass_msun":null,"constellation":"Taurus","discovered":null,"featured":false,"url":"https://spacecatalog.org/object/2mass-j04414489-2301513","radius_km":null,"radius_kind":null,"data_quality":null,"description":null,"properties":{"wds_id":"04417+2302","companions":[{"measured":2009,"magnitude":21.2,"components":"Aa,Ab","discoverer_code":"TOD   1","separation_arcsec":0.1,"position_angle_deg":121},{"measured":2015,"magnitude":10.73,"components":"AB","discoverer_code":"KSA  29","separation_arcsec":12.3,"position_angle_deg":58}],"mass_solar":0.019,"radius_solar":0.231916,"spectral_type":"M8.5","stars_in_system":1,"planets_in_system":1,"surface_temperature_k":2936,"stellar_parameters_method":"NASA Exoplanet Archive composite parameters"},"designations":[],"source":{"id":"exoplanet_archive","name":"NASA Exoplanet Archive (Planetary Systems Composite Parameters)","url":"https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars","license":"Public domain (NASA)"},"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."}