XTE J1739−285
Neutron star in the constellation Ophiuchus
From Wikipedia, the free encyclopedia
XTE J1739−285 is a low-mass X-ray binary in the constellation Ophiuchus, situated approximately 13,000 light-years from Earth.[2] It was first observed on 19 October 1999 by NASA's Rossi X-ray Timing Explorer satellite.[3]
Right ascension17h 39m 53.4s[1]
Declination−28° 29′ 43″[1]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 17h 39m 53.4s[1] |
| Declination | −28° 29′ 43″[1] |
| Characteristics | |
| Spectral type | Q[citation needed] |
| Astrometry | |
| Distance | 4,000[2] pc |
| Details | |
| Mass | 1.51[3] M☉ |
| Radius | 10.9[3] km |
| Other designations | |
| SWIFT J1740.6−2821B | |
| Database references | |
| SIMBAD | data |
It had previously been claimed that XTE J1739−285 was the fastest-spinning celestial body yet known, with a frequency of 1122 Hz.[4] However, a re-analysis of these data by other astronomers has been unable to reproduce this result.[5]
XTE J1739−285 has been proposed as a possible quark star, as well as 3C 58.[3]
