XTE J1739-285

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XTE J1739-285
Observation data
Epoch J2000      Equinox J2000
Constellation Ophiuchus
Right ascension 17h 39m 53.95s
Declination -28° 29' 46.8"'
Characteristics
Spectral type X
U−B color index ?
B−V color index ?
Variable type None
Astrometry
Distance 39,000 Ly
Details
Mass M
Radius R
Luminosity L
Temperature K
Metallicity ?
Age ? years
Other designations

XTE J1739-285 is a neutron star,[1] in the constellation Ophiuchus, situated approximately 39,000 light-years from Earth. It was first observed on 19 October 1999 by NASA's Rossi X-ray Timing Explorer satellite.

It had previously been claimed that XTE J1739-285 was the fastest-spinning celestial body yet known, with a frequency of 1122 Hz (approximately 67,320 RPM).[2] However, a re-analysis of these data by other astronomers has been unable to reproduce this result.[3]

XTE J1739-285 has been proposed as a possible quark star, as well as 3C 58.

References[edit]