11 Orionis
11 Orionis is a solitary Ap star in the equatorial constellation of Orion, near the border with Taurus. It is visible to the naked eye with an apparent visual magnitude of 4.65, and it is located approximately 365 light years away from the Sun based on parallax. The star is moving further from the Sun with a heliocentric radial velocity of +16.8 km/s.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 04m 34.14916s |
| Declination | +15° 24′ 14.7771″ |
| Apparent magnitude (V) | 4.65 |
| Characteristics | |
| Spectral type | B9 IV or A1 Vp SiCr |
| U−B color index | −0.10 |
| B−V color index | −0.06 |
| Variable type | α² CVn |
| Astrometry | |
| Radial velocity (Rv) | +16.80 km/s |
| Proper motion (μ) | RA: +17.80 mas/yr Dec.: −31.15 mas/yr |
| Parallax (π) | 8.93 ± 0.24 mas |
| Distance | 365 ± 10 ly (112 ± 3 pc) |
| Absolute magnitude (MV) | −0.59 |
| Details | |
| Radius | 3.6 R☉ |
| Luminosity | 220 L☉ |
| Temperature | 9,520 K |
| Rotational velocity (v sin i) | 36 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is a chemically peculiar star, known as an Ap star, with enhanced silicon and chromium lines in its spectrum. It is an α² CVn variable, ranging from 4.65 to 4.69 magnitude with a period of 4.64 days. The magnetic field measured from metal lines has a strength of +160±390 G.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.