HD 141569
HD 141569 is an isolated Herbig Ae/Be star of spectral class A2Ve approximately 364 light-years away in the constellation of Libra. The primary star has two red dwarf companions (orbiting each other) at about nine arcseconds. In 1999, a protoplanetary disk was discovered around the star. A gap in the disk led to speculation about a possible extrasolar planet forming in the disk.
HD 141569 and its two companions taken by Hubble in 2002 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Libra |
| Right ascension | 15h 49m 57.7483s |
| Declination | −03° 55′ 16.342″ |
| Apparent magnitude (V) | 7.12 |
| Characteristics | |
| Spectral type | A2 Ve |
| Astrometry | |
| Proper motion (μ) | RA: −17.420(31) mas/yr Dec.: −19.113(26) mas/yr |
| Parallax (π) | 8.9597 ± 0.0293 mas |
| Distance | 364 ± 1 ly (111.6 ± 0.4 pc) |
| Details | |
| Mass | 3.1 M☉ |
| Luminosity | 24.2 L☉ |
| Temperature | 10,500 K |
| Age | 5 million years |
| Other designations | |
| Database references | |
| SIMBAD | data |
In November 2019, researchers studied HD 141569A (pre-main sequence B9.5 star) and made the first polarimetric detection of the inner ring circling the star. This may help better determine essential features of planetary development. According to the researchers, "Considering resolved imaging data from other high-contrast facilities, the HD 1415169A debris disc shapes up to be made of at least three, and potentially four nested rings, with spiral structures on the three spatially resolved rings [...] As such, it is an excellent laboratory for studying dynamically perturbed discs."