XTE J1739-285
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| 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
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