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.

11 Orionis
Location of 11 Orionis (circled)
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
Distance365 ± 10 ly
(112 ± 3 pc)
Absolute magnitude (MV)−0.59
Details
Radius3.6 R
Luminosity220 L
Temperature9,520 K
Rotational velocity (v sin i)36 km/s
Other designations
11 Ori, V1032 Ori, BD+15°732, FK5 1140, GC 6191, HD 32549, HIP 23607, HR 1638, SAO 94290
Database references
SIMBADdata

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.

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