Delta Bootis

Database links to δ Bootis

Binary star δ bootis
Observation dates equinox :  J2000.0 , epoch : J2000.0
AladinLite
Constellation	Bear keeper
Right ascension	15 h 15 m 30.1630 s
declination	+ 33 ° 18 ′ 53.401 ″
Apparent brightness	3.45 likes
Astrometry
Radial velocity	(−12.3 ± 0.9) km / s
parallax	(27.94 ± 0.61) mas
distance	(117 ± 3) ly ((35.8 ± 0.8) pc )
Proper movement :
Rec. Share:	(+83.9 ± 0.7) mas / a
Dec. portion:	(−109.5 ± 0.5) mas / a
Individual data
Names	A; B.
Observation data:
Apparent brightness	A.	3.47 likes
	B.	7.8 likes
Typing:
Spectral class	A.	G8 III
	B.	G0 V
B − V color index	A.	0.95
U − B color index	A.	0.66
Other names and catalog entries
Bayer name δ bootis Flamsteed name 49 bootis Bonn survey BD + 33 ° 2561 BD + 33 ° 2562 Bright Star Catalog HR 5681 HR {{{HR2}}} Henry Draper Catalog HD 135722 HD {{{HD2}}} SAO catalog SAO 64589 SAO 64591 Tycho catalog TYC 2566-1639-1 [1] TYC 2566-246-1 [2] Hipparcos catalog HIP 74666 HIP 74674 WDS catalog WDS J15155 + 3319 Further designations: CCDM J15156 + 3319 • IDS 15115 + 3341

Delta Bootis (short form δ Boo , Flamsteed name 49 Bootis ) is the fourth brightest star in the bear guardian . It represents the left shoulder of the mythological shepherd boat , on some celestial globes also his shepherd's staff.

The 3rd magnitude star has spectral class G8. It is 117 light years away from us and is a double star that can be clearly separated even in binoculars : angular distance approx. 105 ", magnitudes 3.5 and 8 mag.

swell

1. ↑ ^{a b c d} SIMBAD database
2. ^ Hipparchus catalog for A
3. ^ Hipparchus catalog for B
4. ↑ ^{a b} Bright Star Catalog for component A