14450+2704 STF 1877 AB (Izar)
14h 44m 59.14s +27° 04' 29.9" P.A. 347.00 sep 2.9 mag 2.58,4.81 Sp K0II-III dist. 62.11 pc (202.6 l.y.)
Coord 2000
14450+2704
Discov num
STF1877
Comp
AB
Coord arcsec 2000
14 44 59.14 +27 04 29.9
Date first
1822
Date last
2020
Obs
475
Pa first
318
Pa last
346.6
P.A. Now (θ)
346.6°
Sep first
2.7
Sep last
2.88
Sep. Now (ρ)
2.88"
Mag pri
2.58
Mag sec
4.81
delta mag (ΔM)
2.23
Spectral class
K0II-III (yellow-orange)
Pri motion ra
-051
Sec motion ra
Pri motion dec
+020
Sec motion dec
Notes
N
(See Notes)
Nature of this double is uncertain.
14450+2704 SYSTEM COMPONENTS
Show
name
SAO
coord
wds_name
last
obs
pa
sep
mag1
mag2
d_mag
orb
current
Show
Izar
83500
14 44 59 +27 04 30
STF 1877 AB
2020
475
347
2.9
2.58
4.81
2.23
<===
Show
83500
14 44 59 +27 04 30
STF 1877 AC
2020
7
254
174.1
2.58
12.58
10.00
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Common name
Izar
Constellation
Bootes
SAO
83500
HIP
72105
Tycho2
2019-01251-1
Gaia DR2
1279798789901591168
HD
129988
HR
5506
GC
19856
ADS
9372
BD
BD+27 2417
Bayer
Epsilon Bootis
Bayer name
Eps Boo
Flamsteed
36 Bootis
Flamsteed name
36 Boo
Distance
62.11
Distance ly
202.6
Bayer greek
ε Boo
WDS 14450+2704 STF 1877 AB (Izar) : NOTES
discov_num
notes
refcode
STF1877
eps Boo = 36 Boo = Izar. B is a spectroscopic binary.
Scardia et al. say the quadrant is unambiguous for their 2004 theta
Sca2005a
value of 162.9. This may have been a typographical error on their
part, as other observers find the secondary to be in the opposite
quadrant and a large magnitude difference.
AB: H 1 1.
MEv2010
REFERENCES
refcode
metd
author
reference
MEv2010
-
MacEvoy, B.
...................
MEv2010
private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
Sca2005a
S j
Scardia, M., Prieur, J.-L., Sala, M., Ghigo, M., Koechlin, L., Aristidi, E.,
2005MNRAS.357.1255S
Sca2005a
+C
& Mazzoleni, F.
Sca2005a
+orb
MNRAS 357, 1255, 2005
Sca2005a
(theta corrections from Prieur, private communication)
DISCOVERER
idgroup
discov
author
1
STF
Struve, F.G.W.
WDS HISTORIC DATA
coord_2000
discov_num
comp
epoch
obs
pa
sep
mag_pri
mag_sec
spectr
notes
coord_arcsec_2000
14450+2704
STF1877
AB
2006
426
342
2.8
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2008
436
344
2.9
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2009
438
343
3.0
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2010
447
343
2.8
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2011
447
345
3.0
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2012
455
343
2.9
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2014
458
343
2.9
2.58
4.81
K0II-III
N D
144459.25+270427.0
14450+2704
STF1877
AB
2015
461
343
2.9
2.58
4.81
K0II-III
N
144459.25+270427.0
14450+2704
STF1877
AB
2017
464
345
2.9
2.58
4.81
K0II-III
N
144459.14+270429.9
14450+2704
STF1877
AB
2018
465
344
2.9
2.58
4.81
K0II-III
N
144459.14+270429.9
14450+2704
STF1877
AB
2020
474
346
2.7
2.58
4.81
K0II-III
N
144459.14+270429.9
If you need more information about this double, apply for a
data request form to the WDS.
WDS 14450+2704 STF 1877 AB (Izar) : VISUAL OBSERVATIONS REPORTS
Show
date
username ⇓
difficulty
separation
pa_estim
interest
notes
Show
11/04/26
voyager75
mean difficulty
separated
very interesting
La famosa Izar del Boote, risolta a 182X, la secondaria si scorge a ridosso dell’anello di diffrazione.
La primaria č di colore rosso/arancione, la secondaria sembra un verde chiaro
Show
21/03/14
oldscope
easy
separated
355
do not miss it!
A very fine double which is easy to locate and well worth looking at. The difference in magnitudes of the two stars is striking. It is easy to split if the conditions are reasonably good, even when it is still rising in the east. A very good double for the spring time and then summer. My PA estimate is rough but not too far off of the Stella Doppie value of 248.
Show
23/05/27
Daedalus1
mean difficulty
separated
347
do not miss it!
The glare of the primary makes these two stars seem impossibly close. Beautiful.
WDS 14450+2704 STF 1877 AB (Izar) : MEASURES
Records found: 1
WDS 14450+2704 (Izar) : VIRTUAL EYEPIECE
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
WDS 14450+2704 (Izar) : ALADIN DSS IMAGE @ 14h 44m 59.14s +27° 04' 29.9"
DSS color
DSS blue
2MASS
AllWISE
GALEX
SDSS9
XMM
PanSTARRS
WDS 14450+2704 STF 1877 AB (Izar) : NEIGHBORHOODS
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Show
name
coord_2000
discov#
comp
pa
sep
dist(')
Show
Izar
14450+2704
STF1877
AB
347
2.9
Show
Izar
14450+2704
STF1877
AC
254
174.1
Show
14457+2638
CVR 158
308
69.4
29
Show
14487+2728
CVR 757
171
11.7
55
Show
14423+2615
LDS4490
317
13.9
62
Show
14416+2747
COU 407
114
0.4
62
Show
14491+2628
AG 346
335
9.6
66
Show
14428+2807
CBL 466
185
95.8
70
Show
14474+2813
KPP3285
271
5.6
76
Show
14393+2648
A 571
109
1.8
78
Show
14514+2750
KPP1961
35
15.5
98
Show
14403+2549
COU 406
17
3.0
99
Show
14401+2548
KPP2401
126
20.7
101
Show
14500+2546
KPP1410
340
10.6
104
Show
14431+2847
HJ 5487
239
19.6
106
Show
14518+2759
GRV 894
40
16.7
107
Show
14500+2837
HL 4
AB
209
61.0
114
Show
14500+2837
HJ 5489
AC
21
110.3
114
Show
14376+2809
COU 405
106
1.5
119
Show
14454+2911
HJ 2745
128
12.5
127
Show
14444+2454
SLW1025
262
10.4
131
Show
14367+2815
UC 2802
122
36.8
131
Show
14401+2511
SLW1015
281
111.2
132
Show
14550+2652
RAO 324
30
2.9
135
Show
14341+2716
SLW1006
18
162.7
146
Show
14342+2639
AZC 87
272
38.0
147
Show
14485+2445
COU 304
297
0.4
148
Show
14478+2440
KPP2507
222
22.5
150
Show
14460+2934
CVR1597
271
4.0
150
Show
14543+2542
CVR 764
300
13.5
150
Show
14354+2546
RAO 317
272
0.4
151
Show
14552+2557
CVR 765
22
14.7
153
Show
14449+2428
POU3172
176
3.9
158
Show
14333+2725
A 688
16
0.8
158
Show
14418+2432
TOK 297
AB
172
215.8
159
Show
14418+2432
RAO 64
BC
62
17.2
162
Show
14519+2921
WIS 272
249
999.9
165
Show
14387+2931
UC 2809
324
26.4
169
Show
14325+2645
LDS4476
49
2.3
169
Show
14484+2422
STF1884
55
2.3
169
Show
14323+2641
A 570
AB
234
0.2
171
Show
14339+2835
GRV 889
87
38.7
173
Show
14521+2439
KPP2020
57
16.1
175
Show
14516+2936
A 1112
18
6.3
175
Show
14349+2510
LDS4481
205
200.8
179
Show
14536+2450
UC 2866
AB
202
62.1
179
Show
14415+2957
LDS6298
103
6.0
179
Show
14477+2406
HO 263
136
0.2
183
Show
14314+2738
AZC 86
149
24.1
185
Show
14489+2404
HJ 2747
47
12.9
189
Show
14331+2526
HJ 2730
303
27.2
189
WDS 14450+2704 : COMPONENTS
A
B
B
pa=348.0°
sep=2.86"
C
pa=252.6°
sep=156.46"
pa=251.5°
sep=156.76"
14450+2704 A
Common name
Izar
Other names
Mirac, Mirak
Coord arcsec 2000
144459.14+270429.9
Mag
2.58
Spectral class
K0II (yellow-orange)
PmRA
-51.00
PmDE
20.0
SAO
83500
HIP
72105
Tycho2
2019-01251-1
HD
129988
HR
5506
GC
19856
BD
BD+27 2417
Bayer
Epsilon Bootis
Bayer name
Eps Boo
Flamsteed
36 Bootis
Flamsteed name
36 Boo
Tycho2
2019-01251-1
Pflag
RAmdeg
221.24676327
DEmdeg
27.07420780
PmRA
-42.2
PmDE
13.6
E RAmdeg
3
E DEmdeg
3
E pmRA
2.2
E pmDE
2.2
EpRAm
1991.61
EpDEm
1991.49
Num
4
Q RAmdeg
0.7
Q DEmdeg
1.3
Q pmRA
0.6
Q pmDE
1.1
BTmag
3.937
E BTmag
0.014
VTmag
2.578
E VTmag
0.009
Prox
29
TYC
T
HIP
72105
CCDM
A
RAdeg
221.24687333
DEdeg
27.07417556
EpRA 1990
1.63
EpDE 1990
1.51
E RAdeg
3.2
E DEdeg
3.3
Posflg
D
Corr
-0.1
SAO
83500
DelFlag
RA1950
PmRA1950
-0.0038
DE1950
PmDE1950
0.018
Vmag
2.7
SpType
K0
Double code
Source
71
CatNum
1633
DM
BD+27 2417
DMcomp
BDsup
HD
129988
M HD
9
GC
19856
RA1950rad
3.85195161
DE1950rad
0.4761969
PmRA2000
-0.0037
PmDE2000
0.021
Catalog
H
HIP
72105
Proxy
H
RAhms
14 44 59.25
DEdms
+27 04 27.0
Vmag
2.35
VarFlag
R Vmag
H
RAdeg
221.247
DEdeg
27.0742
AstroRef
A
Plx
15.55
CCDM
14449+2704
N CCDM
I
Nsys
1
Ncomp
2
MultFlag
C
Source
Qual
A
M HIP
AB
Theta
341
Rho
2.867
HD
129988
BD
BD+27 2417
CD
CP
Dm number
+27 2417
VIred
0.95
SpType
A0
R SpType
Coord arcsec 2000
144459.25+270427.0
HIP
72105
Sn
15
So
3
Nc
2
RArad
3.8614864893
DErad
0.4725334744
Plx
16.1
PmRA
-50.95
PmDE
21.07
E RArad
0.42
E DErad
0.37
E Plx
0.66
E pmRA
0.59
E pmDE
0.58
Hpmag
2.5167
E Hpmag
0.0005
SHp
0.004
VA
0
BV
0.966
E BV
0.004
VI
0.95
14450+2704 B
Coord arcsec 2000
144459.10+270432.7
Mag
4.81
Spectral class
III
Calc delta mag
2.23
Calc coord
yes
14450+2704 C
Coord arcsec 2000
144447.96+270343.1
Mag
12.58
Spectral class
III
PmRA
-6.00
PmDE
-16.0
Calc delta mag
10
Calc coord
yes