20170+3725 CIA 9 Aa1,2
20h 17m 00.03s +37° 25' 23.8" P.A. 305.00 sep 0.0 mag 7.20,8.00 Sp WN5+O9V dist. 172.12 pc (561.46 l.y.)
Coord 2000
20170+3725
Discov num
CIA 9
Comp
Aa1,2
Coord arcsec 2000
20 17 00.03 +37 25 23.8
Date first
2013
Date last
2013
Obs
1
Pa first
305
Pa last
305.3
P.A. Now (θ)
305.3°
Sep first
0.0
Sep last
0.012
Sep. Now (ρ)
0.012"
Mag pri
7.20
Mag sec
8.00
delta mag (ΔM)
0.8
Spectral class
WN5+O9V (Wolf-Rayet/blue)
Pri motion ra
-007
Sec motion ra
Pri motion dec
-005
Sec motion dec
Notes
N
K
(See Notes, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
Nature of this double is uncertain.
20170+3725 SYSTEM COMPONENTS
Show
name
SAO
coord
wds_name
last
obs
pa
sep
mag1
mag2
d_mag
orb
current
Show
69755
20 17 00 +37 25 24
CIA 9 Aa1,2
2013
1
305
0.0
7.20
8.00
0.80
<===
Show
69755
20 17 00 +37 25 24
HDS 2891 Aa,Ab
2016
4
55
0.9
8.11
11.25
3.14
Show
HD 193077
69755
20 17 00 +37 25 24
A 1423 AB
2016
9
128
4.4
8.11
12.10
3.99
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Constellation
Cygnus
SAO
69755
HIP
99982
Tycho2
2684-00857-1
Gaia DR2
2060661846184974464
HD
193077
BD
BD+36 3987
Distance
172.12
Distance ly
561.46
WDS 20170+3725 CIA 9 Aa1,2 : NOTES
discov_num
notes
refcode
CIA 9
Aa1,Aa2: Primary is Wolf-Rayet WR 138, distance 1380pc. Resolved with
CHARA Array by Richardson et al. (2016), who infer the following
stellar parameters for the WR star and its close companion:
Spectral type WN5o O9 V
T* (kK) 56000 +/- 5000 31000 +/- 2000
log L (Lsun) 5.35 +/- 0.05 4.82 +/- 0.05
R* (Rsun) 4.8 +/- 2 8.9 +/- 2
CIA2016b
REFERENCES
refcode
metd
author
reference
CIA2016b
Kc j
Richardson, N.D., Shenar, T., Roy-Loubier, O., Schaefer, G., Moffat, A.F.J.,
2016MNRAS.461.4115R
CIA2016b
St-Louis, N., Gies, D.R., Farrington, C., Hill, G.M., Williams, P.M.,
CIA2016b
Gordon, K., Pablo, H., & Ramiaramanantsoa, T.
CIA2016b
MNRAS 461, 4115, 2016
DISCOVERER
idgroup
discov
author
1
A
Aitken, R.G.
312
HDS
Hipparcos Double Star (from additional DD list)
WDS HISTORIC DATA
coord_2000
discov_num
comp
epoch
obs
pa
sep
mag_pri
mag_sec
spectr
notes
coord_arcsec_2000
20170+3725
CIA 9
Aa1,2
2013
1
305
0.0
7.20
8.00
WN5+O9V
N K
201700.03+372523.8
If you need more information about this double, apply for a
data request form to the WDS.
WDS 20170+3725 CIA 9 Aa1,2 : VISUAL OBSERVATIONS REPORTS
No records found.
WDS 20170+3725 CIA 9 Aa1,2 : MEASURES
No records found.
WDS 20170+3725 : 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 20170+3725 : ALADIN DSS IMAGE @ 20h 17m 00.03s +37° 25' 23.8"
DSS color
DSS blue
2MASS
AllWISE
GALEX
SDSS9
XMM
PanSTARRS
WDS 20170+3725 CIA 9 Aa1,2 : 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
20170+3725
HDS2891
Aa,Ab
55
0.9
Show
20170+3725
A 1423
AB
128
4.4
Show
20170+3725
CIA 9
Aa1,2
305
0.0
Show
20168+3731
ARY 25
293
147.1
6
Show
20176+3729
SLE 987
208
11.1
9
Show
20171+3738
SLE 986
AB
347
6.4
14
Show
20171+3738
SLE 986
AC
1
17.9
14
Show
20165+3739
BU 442
UV
127
8.0
15
Show
20165+3739
BU 442
BC
49
16.9
15
Show
20165+3739
BU 442
BD
2
20.1
15
Show
20165+3739
ABH 135
BE
88
50.2
15
Show
20165+3739
ABH 135
BF
139
64.4
15
Show
20165+3739
ABH 135
BO
125
41.5
15
Show
20165+3739
BU 442
BP
269
16.6
15
Show
20165+3739
BU 442
BR
308
34.4
15
Show
20165+3739
BU 442
BS
124
3.7
15
Show
20165+3739
BU 442
BT
162
6.5
15
Show
20165+3739
BU 442
BU
74
26.0
15
Show
20165+3739
BU 442
BV
86
31.3
15
Show
20165+3739
BU 442
CD
306
15.1
15
Show
20165+3739
BU 442
CU
109
12.7
15
Show
20165+3739
BU 442
CV
116
20.4
15
Show
20165+3739
BU 442
AB
103
18.3
15
Show
20165+3739
SLE 982
AG
10
88.5
15
Show
20165+3739
SLE 982
AH
19
111.6
15
Show
20165+3739
SLE 982
AI
43
63.2
15
Show
20165+3739
SLE 982
AJ
34
96.5
15
Show
20165+3739
SLE 982
AK
34
114.9
15
Show
20165+3739
SLE 982
AL
27
177.3
15
Show
20165+3739
SLE 982
AM
65
88.9
15
Show
20165+3739
SLE 982
AN
76
155.9
15
Show
20165+3739
BU 442
AQ
156
8.7
15
Show
20165+3739
SLV 8
AC
77
31.4
15
Show
20165+3739
BU 442
AP
155
4.7
15
Show
20165+3739
BU 442
AR
332
19.2
15
Show
20165+3739
ABH 135
AD
49
24.4
15
Show
20165+3739
SLE 982
AO
118
58.7
15
Show
20161+3738
SLE 980
226
14.2
17
Show
20179+3712
SEI1071
11
27.5
18
Show
20169+3743
SLE 985
186
14.1
18
Show
20177+3740
SLE 989
223
8.9
18
Show
20185+3735
TDT2155
125
0.6
21
Show
20155+3713
ES 2189
136
3.3
21
Show
20187+3720
SLE 995
143
8.8
22
Show
20162+3745
TOB 183
256
14.7
23
Show
20187+3715
SLE 994
353
14.5
23
Show
20189+3730
TDT2160
274
6.0
23
Show
20165+3703
ARY 24
307
96.3
23
Show
20189+3723
BKO 823
201
6.4
24
Show
20150+3729
KPP2316
227
19.3
24
Show
20191+3720
TDT2163
289
3.7
26
WDS 20170+3725 : COMPONENTS
A
Aa2
Ab
Aa2
pa=311.7°
sep=0.01"
Ab
pa=48.2°
sep=0.77"
pa=49.0°
sep=0.77"
B
pa=134.6°
sep=3.82"
pa=134.6°
sep=3.83"
pa=146.1°
sep=3.85"
20170+3725 A
Name
HD 193077
Coord arcsec 2000
201700.03+372523.8
Mag
8.11
Spectral class
WN (Wolf-Rayet)
PmRA
-5.00
PmDE
-16.0
SAO
69755
HIP
99982
Tycho2
2684-00857-1
HD
193077
ADS
13641
BD
BD+36 3987
Tycho2
2684-00857-1
Pflag
RAmdeg
304.25010340
DEmdeg
37.42327537
PmRA
-6.6
PmDE
-4.7
E RAmdeg
6
E DEmdeg
5
E pmRA
1.0
E pmDE
1.1
EpRAm
1990.94
EpDEm
1991.42
Num
14
Q RAmdeg
1.5
Q DEmdeg
0.8
Q pmRA
1.6
Q pmDE
0.9
BTmag
8.454
E BTmag
0.016
VTmag
8.112
E VTmag
0.012
Prox
9
TYC
T
HIP
99982
CCDM
A
RAdeg
304.25012139
DEdeg
37.42328639
EpRA 1990
1.53
EpDE 1990
1.75
E RAdeg
5.8
E DEdeg
5.0
Posflg
Corr
0.0
SAO
69755
DelFlag
RA1950
PmRA1950
0.001
DE1950
PmDE1950
0.017
Vmag
7.8
SpType
Oc
Double code
Source
5
CatNum
1950
DM
BD+36 3987
DMcomp
BDsup
HD
193077
M HD
0
GC
RA1950rad
5.30206118
DE1950rad
0.65044655
PmRA2000
0.0013
PmDE2000
0.015
Catalog
H
HIP
99982
Proxy
H
RAhms
20 17 00.03
DEdms
+37 25 23.8
Vmag
7.99
VarFlag
R Vmag
H
RAdeg
304.25
DEdeg
37.4233
AstroRef
A
Plx
3.89
CCDM
20170+3725
N CCDM
I
Nsys
1
Ncomp
2
MultFlag
C
Source
Qual
A
M HIP
AC
Theta
50
Rho
0.865
HD
193077
BD
BD+36 3987
CD
CP
Dm number
+36 3987
VIred
0.34
SpType
WNs...
R SpType
Coord arcsec 2000
201700.03+372523.8
HIP
99982
Sn
15
So
3
Nc
2
RArad
5.3101663439
DErad
0.6531595631
Plx
5.81
PmRA
-3.85
PmDE
-4.76
E RArad
0.82
E DErad
0.95
E Plx
1.18
E pmRA
0.93
E pmDE
1.03
Hpmag
8.0663
E Hpmag
0.0015
SHp
0.02
VA
0
BV
0.294
E BV
0.015
VI
0.34
Ccdm
20170+3725
RComp
Comp
A
Note1
Note2
Discov num
DRAs
0.03
DDEs
23.7
R dRAs
82
Year
Theta
Rho
Obs
3
Vmag
8.1
Sp
OC
PmNote
*
PmRA
-2
PmDE
-7
Dm number
+36 3987
Cat1
BD
Name2
+37 1950
Cat2
AGK2/3
HD
193077
M HD
ADS BDS
A13641
M ADS BDS
N IDS
IDS
20133N3707A
HIC
99982
20170+3725 Aa2
Coord arcsec 2000
201700.03+372523.8
Mag
8
Spectral class
O9V (blue)
Calc delta mag
0.8
Calc coord
yes
20170+3725 Ab
Coord arcsec 2000
201700.08+372524.3
Mag
11.25
PmRA
-2.00
PmDE
-7.0
Calc delta mag
4.05
Calc coord
yes
20170+3725 B
Coord arcsec 2000
201700.26+372521.1
Mag
12.1
Calc delta mag
4.9
Calc coord
yes
Ccdm
20170+3725
RComp
Comp
B
Note1
Note2
Discov num
A 1423
DRAs
DDEs
R dRAs
Year
1906
Theta
130
Rho
4.4
Obs
3
Vmag
12.1
Sp
PmNote
PmRA
PmDE
Dm number
Cat1
Name2
Cat2
HD
M HD
ADS BDS
A13641
M ADS BDS
N IDS
IDS
20133N3707B
HIC
99982