KSw 71
Star in the constellation Lyra
From Wikipedia, the free encyclopedia
KSw 71 is a rapidly-spinning star in the constellation of Lyra. It is thought to have formed after two stars in a close binary system merged; its rotation has deformed it into an oblate spheroid shape. KSw 71 was discovered, alongside other pumpkin-shaped stars by NASA's Kepler and Swift missions and produces X-rays at more than 100 times the peak levels ever seen from the Sun.[5]
Artist's impression of KSw 71 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 14m 17.2632s[2] |
| Declination | +42° 36′ 31.619″[2] |
| Characteristics | |
| Spectral type | K0-2 IV-III[3] |
| Astrometry | |
| Proper motion (μ) | RA: −0.309 mas/yr[2] Dec.: +6.073 mas/yr[2] |
| Parallax (π) | 3.1267±0.0170 mas[2] |
| Distance | 1,043 ± 6 ly (320 ± 2 pc) |
| Details | |
| Mass | 0.8257[4] M☉ |
| Radius | 10.5[3] R☉ |
| Surface gravity (log g) | 4.38[4] cgs |
| Temperature | 4,967[4] K |
| Rotation | 5.22 days[3] |
| Rotational velocity (v sin i) | 98.6 – 116[3] km/s |
| Other designations | |
| 2MASS J19141726+4236315, KIC 7107762 | |
| Database references | |
| SIMBAD | data |
| KIC | data |
18 "pumpkin stars" have been discovered,[6] including this one.
