101 Virginis

101 Virginis

Observation data Epoch J2000      Equinox J2000
Constellation	Boötes
Right ascension	14h 17m 28.4519s
Declination	+15° 15′ 48.167″
Apparent magnitude (V)	5.865
Characteristics
Spectral type	M3IIIa
U−B color index	2.07
B−V color index	1.71
R−I color index	0.87
Variable type	Variable star identification NSV 6613 §
Astrometry
Radial velocity (Rv)	-10.4 km/s
Proper motion (μ)	RA: 15.33 mas/yr Dec.: 7.73 mas/yr
Parallax (π)	3.22 ± 0.76 mas
Distance	approx. 1000 ly (approx. 310 pc)
Absolute magnitude (MV)	7.538
Details
Temperature	2,000–3,500 K
Other designations
CY Boötis, IRAS 14150+1529, SA 82-322, AG+15° 1445, GSC 01469-01456, IRC +20271, BD+15° 2690, HD 125180, 2MASS J14172843+1515478, TYC 1469-1456-1, DO 14906, HIC 69829, NSV 6613, UBV M 20098, GC 19284, HIP 69829, PPM 130465, YZ 15 5174, GCRV 8358, HR 5352, SAO 100956.
Database references
SIMBAD	data
Data sources:
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.)

101 Virginis or CY Boötis is a variable star in the Boötes constellation. "Semiregular late-type (M, C, S or Me, Ce, Se) giants with poorly defined periodicity (mean cycles in the range of 20 to 2300 days) or with alternating intervals of periodic and slow irregular changes, and even with light constancy intervals (RR CrB, AF Cyg). Every star of this type may usually be assigned a certain mean period (cycle), which is the value given in the Catalogue. In a number of cases, the simultaneous presence of two or more periods of light variation is observed;"

Boötes Constellation

Position

Local CY Boötis (HD 125180)

References

• HR 5352
• Image 101 Virginis