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Single star in the constellation Boötes
45 Boötis
Observation data
Epoch J2000
Equinox J2000
Constellation
Boötes
Right ascension
15h 07m 18.06587s
[1]
Declination
+24° 52′ 09.0952″
[1]
Apparent magnitude (V)
4.93
[2]
Characteristics
Spectral type
F5 V
[3]
B−V
color index
+0.43
[3]
Astrometry
Radial velocity (Rv ) −11.2
[2] km/s
Proper motion (μ)
RA: +184.767
[1]
mas /
yr
Dec.: −164.012
[1]
mas /
yr
Parallax (π) 51.6674 ± 0.1882
mas
[1]
Distance 63.1 ± 0.2
ly (19.35 ± 0.07
pc )
Absolute magnitude (MV ) 3.96
[4]
Details
[2]
Mass 1.21± 0.16
M ☉
Radius 1.461± 0.027
R ☉
Luminosity 3.30+0.25 −0.22
L ☉
Surface gravity (log g ) 4.19
cgs
Temperature 6,435
K
Metallicity [Fe/H]−0.02
dex
Rotational velocity (v sin i ) 39.8 km/s
Age 1.6+0.8 −0.6
Gyr
Other designations
c Boo ,
45 Boo ,
NSV 6945 ,
BD +25°2873 ,
FK5 1396,
GJ 578,
HD 134083,
HIP 73996,
HR 5634,
SAO 83671,
WDS J15073+2452
[5]
Database references
SIMBAD
data
45 Boötis is a single
[6]
[7]
star located 63
light years away from the Sun in the northern
constellation of
Boötes . It has the
Bayer designation c Boötis ; 45 Boötis is the
Flamsteed designation . This body is visible to the naked eye as a faint, yellow-white hued star with an
apparent visual magnitude of 4.93.
[2] It has a relatively high
proper motion , traversing the
celestial sphere at the rate of 0.247
″ per year.
[8] The star is moving closer to the Earth with a heliocentric
radial velocity of −11 km/s,
[2] and is a stream member of the
Ursa Major Moving Group .
[9]
This is an
F-type main-sequence star with a
stellar classification of F5 V.
[3] It is around 1.6 billion years old and is spinning with a
projected rotational velocity of 40 km/s. The star has 1.2 times the
mass of the Sun and 1.46 times the
Sun's radius . It is radiating 3.3 times the
luminosity of the Sun from its
photosphere at an
effective temperature of 6,435 K.
[2] 45 Boötis is a source of
X-ray emission .
[10]
There is a magnitude 11.53
visual companion at an
angular separation of 103.50
″ along a position angle (PA) of 40°, as of 2012. A magnitude 10.23 star can be found at a separation of 247.90″ with a PA of 358°, as of 2015.
[11]
References
^
a
b
c
d
e
Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 616 . A1.
arXiv :
1804.09365 .
Bibcode :
2018A&A...616A...1G .
doi :
10.1051/0004-6361/201833051 .
Gaia DR2 record for this source at
VizieR .
^
a
b
c
d
e
f Valenti, J. A.; Fischer, D. A. (2005), "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs", The Astrophysical Journal Supplement Series , 159 (1): 141–166,
Bibcode :
2005ApJS..159..141V ,
doi :
10.1086/430500 .
^
a
b
c Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series , 85 (3): 1015–1019,
Bibcode :
1990A&AS...85.1015M
^ Eggen, Olin J. (August 1998), "The Sirius Supercluster and Missing Mass near the Sun", The Astronomical Journal , 116 (2): 782–788,
Bibcode :
1998AJ....116..782E ,
doi :
10.1086/300465 .
^
"40 Boo" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved May 12, 2019 .
^ Fuhrmann, K.; et al. (2017), "Multiplicity among Solar-type Stars", The Astrophysical Journal , 836 (1): 139,
Bibcode :
2017ApJ...836..139F ,
doi :
10.3847/1538-4357/836/1/139 .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879,
arXiv :
0806.2878 ,
Bibcode :
2008MNRAS.389..869E ,
doi :
10.1111/j.1365-2966.2008.13596.x ,
S2CID
14878976 .
^ Lépine, Sébastien; Shara, Michael M. (March 2005), "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)", The Astronomical Journal , 129 (3): 1483–1522,
arXiv :
astro-ph/0412070 ,
Bibcode :
2005AJ....129.1483L ,
doi :
10.1086/427854 ,
S2CID
2603568 .
^ King, Jeremy R.; et al. (2003),
"Stellar Kinematic Groups. II. A Reexamination of the Membership, Activity, and Age of the Ursa Major Group" , The Astronomical Journal , 125 (4): 1980,
Bibcode :
2003AJ....125.1980K ,
doi :
10.1086/368241 .
^ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", The Astrophysical Journal Supplement , 184 (1): 138–151,
arXiv :
0910.3229 ,
Bibcode :
2009ApJS..184..138H ,
doi :
10.1088/0067-0049/184/1/138 ,
S2CID
119267456 .
^ Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal , 122 (6): 3466,
Bibcode :
2001AJ....122.3466M ,
doi :
10.1086/323920 .
External links