{"release":{"id":"DR1","released_on":"2026-08-21","doi":null,"url":"https://spacecatalog.org/releases#dr1"},"epoch":{"requested":"now","label":"J2026.686","julian_year":2026.686,"time":"2026-09-08T15:21:51.972Z","years_from_j2000":26.686,"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-j0835m4510","name":"Vela Pulsar","class":"pulsar","category":"neutron_star","object_type":"Pulsar","mag":null,"mag_band":null,"abs_mag":null,"abs_mag_band":null,"distance_ly":931.8753649049812,"distance_method":"pulsar parallax (timing or VLBI)","ra_deg":128.83588120833335,"dec_deg":-45.17635419444444,"epoch_ra_deg":129.061462,"epoch_dec_deg":-45.268595,"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":"Vela","discovered":"1968","featured":true,"url":"https://spacecatalog.org/object/psr-j0835m4510","radius_km":null,"radius_kind":null,"data_quality":null,"description":"The brightest pulsar in the sky at gamma-ray energies, in the remains of a supernova about eleven thousand years old. It is the object glitches were discovered in: every few years its rotation speeds up abruptly, which is thought to be the superfluid interior slipping against the crust.","properties":{"associations":"GRS:4FGL_J0835.3-4510[aab+22],SNR:Vela,GRS:HESS_J0835-455[aab+06c]","spin_period_s":0.08932838502359318,"uncertainties":{"distance_ly":[50.371641346215256,56.477294842726224]},"spin_period_derivative":1.250077927708845e-13,"radio_flux_1400_mhz_mjy":1050,"characteristic_age_years":11321.877005304157,"dispersion_measure_pc_cm3":67.771,"spin_down_luminosity_erg_s":6.923542724146586e+36,"surface_magnetic_field_gauss":3381530142617.8667},"designations":[{"catalog":"ATNF","designation":"B0833-45"},{"catalog":"ATNF","designation":"J0835-4510"},{"catalog":"ATNF","designation":"PSR B0833-45"},{"catalog":"ATNF","designation":"PSR J0835-4510"},{"catalog":"Common name","designation":"PSR J0835-4510"},{"catalog":"Common name","designation":"Vela pulsar"},{"catalog":"Common name","designation":"Vela Pulsar"}],"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."}