E Ophiuchi

e Ophiuchi (HD 156681) is a star in the constellation Ophiuchus near the border with Hercules, which it had been mistakenly catalogued 66 Herculis.^[4] It has an apparent magnitude of 5.03.

e Ophiuchi

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Ophiuchus[1]
Right ascension	17h 18m 37.0s[2]
Declination	+10° 51′ 52″[2]
Apparent magnitude (V)	5.03[3]
Characteristics
Spectral type	K4II-III[3]
U−B color index	1.89[3]
B−V color index	1.55[3]
R−I color index	0.83[citation needed]
Astrometry
Absolute magnitude (MV)	−0.86[1]
Other designations
e Oph, 66 Her, BD+11 3156, SAO 102725, HD 156681, HR 6433[2]
Database references
SIMBAD	data