{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.683","julian_year":2026.683,"time":"2026-09-07T09:53:33.754Z","years_from_j2000":26.683,"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":"psr-j1915p1606","name":"Hulse-Taylor pulsar","class":"pulsar","category":"neutron_star","object_type":"Pulsar","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":13589.849071530976,"distance_method":"pulsar parallax (timing or VLBI)","ra_deg":288.86666425,"dec_deg":16.107607444444447,"epoch_ra_deg":289.169799,"epoch_dec_deg":16.154175,"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":"Aquila","discovered":"1974","featured":true,"url":"https://spacecatalog.org/object/psr-j1915p1606","radius_km":null,"radius_kind":null,"data_quality":null,"description":"Two neutron stars orbiting each other every eight hours, one of them pulsing. Their orbit is shrinking by about seven millimetres a day, at exactly the rate general relativity predicts for a system radiating gravitational waves — the first evidence those waves exist, and a Nobel Prize in 1993.","properties":{"binary_model":"DDH","spin_period_s":0.05903000321781323,"uncertainties":{"distance_ly":[3068.6755967973168,5595.820205924521]},"spin_period_derivative":8.618315947564405e-18,"radio_flux_1400_mhz_mjy":0.9,"characteristic_age_years":108521661.13480133,"dispersion_measure_pc_cm3":168.77,"spin_down_luminosity_erg_s":1.654107486672002e+33,"surface_magnetic_field_gauss":22824306327.94045},"designations":[{"catalog":"ATNF","designation":"B1913+16"},{"catalog":"ATNF","designation":"J1915+1606"},{"catalog":"ATNF","designation":"PSR B1913+16"},{"catalog":"ATNF","designation":"PSR J1915+1606"},{"catalog":"Common name","designation":"Hulse-Taylor binary"},{"catalog":"Common name","designation":"Hulse-Taylor pulsar"},{"catalog":"Common name","designation":"PSR J1915+1606"}],"source":{"id":"atnf","name":"ATNF Pulsar Catalogue (Manchester+ 2005)","url":"https://www.atnf.csiro.au/research/pulsar/psrcat","license":"Free to use with attribution; cite Manchester+ 2005 (2005AJ....129.1993M)"},"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."}