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Doubles in session


Current system
18213-0254
STFB 8
Eta Ser


Nearby doubles
59' : 18241-0335
TOK 616

65' : 18175-0323
HTP 45AB

76' : 18264-0254
A 85

83' : 18265-0226
GRV1262

85' : 18243-0405
YSC 67AB

89' : 18157-0321
STF2296

92' : 18252-0143
LSC 156

94' : 18226-0428
LDS5862

94' : 18155-0220
LDS6324

96' : 18222-0119
BAL 580

97' : 18250-0135
AC 11

101' : 18148-0231
A 84

106' : 18181-0120
HDS2587AB

112' : 18210-0101
WOR 35

117' : 18185-0105
TDT 786

120' : 18293-0246
HJ 859

122' : 18284-0353
CRI 19

124' : 18133-0324
RST4583

125' : 18291-0338
FOX 230

126' : 18198-0458
SCJ 16

132' : 18224-0505
RST4586

136' : 18126-0329
A 83

137' : 18289-0138
LDS5865

140' : 18296-0151
CON 32AB

144' : 18305-0211
CON 34

144' : 18299-0149
HLA 18AB



Selections
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Binary Systems
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Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

18213-0254 STFB 8 (Eta Ser)

 
 
18h 21m 18.60s -02° 53' 55.8" P.A. 54.00 sep 251.4 mag 3.34,10.87 Sp K2IIIab dist. 18.54 pc (60.48 l.y.)
 
 
Coord 2000 18213-0254 Discov num STFB  8 Comp Coord arcsec 2000 18 21 18.60 -02 53 55.8
Date first 1835 Date last 2010 Obs 25
Pa first 77 Pa last 54.2 P.A. Now (θ) 54.2°
Sep first 110.9 Sep last 251.38 Sep. Now (ρ) 251.38"
Mag pri 3.34 Mag sec 10.87 delta mag (ΔM) 7.53 Spectral class K2IIIab (yellow-orange)
Pri motion ra -548 Sec motion ra +000
Pri motion dec -701 Sec motion dec -007
Notes N L U (See Notes, Linear solution, Proper motion indicates non-physical)
rPM=0.994
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Eta Ser Var name NSV10675 Ser Constellation Serpens SAO 142241
HIP 89962 Tycho2 5102-00416-1 HD 168723 HR 6869
GC 25046 GL Gl 711 BD BD-02 4599 Bayer Eta Serpentis
Bayer name Eta Ser Flamsteed 58 Serpentis Flamsteed name 58 Ser FK5 688
Distance 18.54 Distance ly 60.48 Bayer greek η Ser
 
 
WDS 18213-0254 STFB 8 (Eta Ser) : NOTES
 
 
discov_num notes refcode
STFB 8 eta Ser = 58 Ser
Optical pair, based on study of relative motion of the components
using the method of apparent motion parameters. Kiy2008
H 6 14. MEv2010
 
 
REFERENCES
 
 
refcode metd author reference
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
MEv2010 - MacEvoy, B. ...................
MEv2010 private communication, 2010 (see http://www.handprint.com/ASTRO/index.html)
 
 
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
18213-0254 STFB 8 1999 21 55 242.9 3.34 10.87 K2IIIab NLD 182118.60-025355.8
18213-0254 STFB 8 2009 22 55 250.8 3.34 10.87 K2IIIab NLD 182118.60-025355.8
18213-0254 STFB 8 2010 25 54 251.4 3.34 10.87 K2IIIab NL U 182118.60-025355.8

If you need more information about this double, apply for a data request form to the WDS.

 
 
WDS 18213-0254 STFB 8 (Eta Ser) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18213-0254 STFB 8 (Eta Ser) : MEASURES
 
 
No records found.

 
 
WDS 18213-0254 (Eta Ser) : VIRTUAL EYEPIECE
 
 

18213-0254 STFB 8A mag 3.34 Sp K2IIIab 18213-0254 STFB 8B sep 251.2 P.A. 54.20 mag 10.87 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 18213-0254 (Eta Ser) : ALADIN DSS IMAGE @ 18h 21m 18.60s -02° 53' 55.8"
 
 
 
 
WDS 18213-0254 STFB 8 (Eta Ser) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18213-0254 STFB 8 distance=0' 18241-0335 TOK 616 distance=59' 18175-0323 HTP 45AB distance=65' 18175-0323 HTP 45AG distance=65' 18175-0323 HTP 45AH distance=65' 18175-0323 HTP 45AI distance=65' 18175-0323 HTP 45AK distance=65' 18175-0323 HTP 45AL distance=65' 18175-0323 HTP 45AN distance=65' 18175-0323 HTP 45AQ distance=65' 18175-0323 HTP 45AR distance=65' 18175-0323 HTP 45AS distance=65' 18175-0323 HTP 45AV distance=65' 18175-0323 HTP 45A,Wa distance=65' 18175-0323 HTP 45A,Wb distance=65' 18175-0323 HTP 45A,Wc distance=65' 18175-0323 HTP 45A,We distance=65' 18175-0323 HTP 45A,Wg distance=65' 18175-0323 HTP 45A,Wj distance=65' 18175-0323 HTP 45A,Wn distance=65' 18175-0323 HTP 45A,Wo distance=65' 18175-0323 HTP 45A,Wp distance=65' 18175-0323 HTP 45A,Wq distance=65' 18175-0323 HTP 45A,Xa distance=65' 18175-0323 HTP 45A,Xb distance=65' 18175-0323 HTP 45A,Xc distance=65' 18175-0323 HTP 45A,Xd distance=65' 18175-0323 HTP 45A,Xe distance=65' 18175-0323 HTP 45A,Xf distance=65' 18175-0323 HTP 45A,Xg distance=65' 18175-0323 HTP 45A,Xh distance=65' 18175-0323 HTP 45A,Xi distance=65' 18175-0323 HTP 45A,Xj distance=65' 18175-0323 HTP 45A,Xk distance=65' 18264-0254 A 85 distance=76' 18265-0226 GRV1262 distance=83' 18243-0405 YSC 67AB distance=85' 18243-0405 TOK 420Aa,Ab distance=85' 18157-0321 STF2296 distance=89' 18252-0143 LSC 156 distance=92' 18226-0428 LDS5862 distance=94' 18155-0220 LDS6324 distance=94' 18222-0119 BAL 580 distance=96' 18250-0135 AC 11 distance=97' 18148-0231 A 84 distance=101' 18181-0120 HDS2587AB distance=106' 18181-0120 GII 265AC distance=106' 18210-0101 WOR 35 distance=112' 18185-0105 TDT 786 distance=117' 18293-0246 HJ 859 distance=120' 18284-0353 CRI 19 distance=122' grafico limitrofi
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 18213-0254 STFB 8 54 251.4
Show 18241-0335 TOK 616 288 279.1 59
Show 18175-0323 HTP 45 AB 6 16.6 65
Show 18175-0323 HTP 45 AG 89 17.7 65
Show 18175-0323 HTP 45 AH 175 14.8 65
Show 18175-0323 HTP 45 AI 80 12.6 65
Show 18175-0323 HTP 45 AK 190 12.6 65
Show 18175-0323 HTP 45 AL 305 19.1 65
Show 18175-0323 HTP 45 AN 354 12.2 65
Show 18175-0323 HTP 45 AQ 228 16.8 65
Show 18175-0323 HTP 45 AR 267 14.7 65
Show 18175-0323 HTP 45 AS 337 15.9 65
Show 18175-0323 HTP 45 AV 243 14.0 65
Show 18175-0323 HTP 45 A,Wa 252 5.4 65
Show 18175-0323 HTP 45 A,Wb 264 7.2 65
Show 18175-0323 HTP 45 A,Wc 305 17.0 65
Show 18175-0323 HTP 45 A,We 33 17.3 65
Show 18175-0323 HTP 45 A,Wg 284 15.8 65
Show 18175-0323 HTP 45 A,Wj 316 10.2 65
Show 18175-0323 HTP 45 A,Wn 216 12.7 65
Show 18175-0323 HTP 45 A,Wo 213 12.5 65
Show 18175-0323 HTP 45 A,Wp 270 18.2 65
Show 18175-0323 HTP 45 A,Wq 269 18.0 65
Show 18175-0323 HTP 45 A,Xa 221 13.3 65
Show 18175-0323 HTP 45 A,Xb 268 17.9 65
Show 18175-0323 HTP 45 A,Xc 44 21.4 65
Show 18175-0323 HTP 45 A,Xd 51 23.8 65
Show 18175-0323 HTP 45 A,Xe 249 24.3 65
Show 18175-0323 HTP 45 A,Xf 311 24.8 65
Show 18175-0323 HTP 45 A,Xg 41 25.5 65
Show 18175-0323 HTP 45 A,Xh 250 26.0 65
Show 18175-0323 HTP 45 A,Xi 330 27.7 65
Show 18175-0323 HTP 45 A,Xj 328 28.2 65
Show 18175-0323 HTP 45 A,Xk 35 29.8 65
Show 18264-0254 A 85 190 4.2 76
Show 18265-0226 GRV1262 210 1.6 83
Show 18243-0405 YSC 67 AB 356 0.4 85
Show 18243-0405 TOK 420 Aa,Ab 91 0.0 85
Show 18157-0321 STF2296 6 3.2 89
Show 18252-0143 LSC 156 23 0.2 92
Show 18226-0428 LDS5862 356 4.3 94
Show 18155-0220 LDS6324 10 34.6 94
Show 18222-0119 BAL 580 113 14.6 96
Show 18250-0135 AC 11 355 0.9 97
Show 18148-0231 A 84 318 3.9 101
Show 18181-0120 HDS2587 AB 181 0.1 106
Show 18181-0120 GII 265 AC 167 1.8 106
Show 18210-0101 WOR 35 2 1.4 112
Show 18185-0105 TDT 786 45 2.3 117
Show 18293-0246 HJ 859 217 16.9 120
Show 18284-0353 CRI 19 235 8.3 122

 
 
WDS 18213-0254 : COMPONENTS
 
 
  A
B pa=54.2°
sep=251.17"
 
 
18213-0254 A
 
 
Componente originario normalizzato AB Name Eta Ser Coord arcsec 2000 182118.60-025355.8 Mag 3.34
Spectral class K2IIIab (yellow-orange) PmRA -548.00 PmDE -701.0 SAO 142241
HIP 89962 Tycho2 5102-00416-1 HD 168723 HR 6869
GC 25046 BD BD-02 4599 Bayer Eta Serpentis Bayer name Eta
Flamsteed 58 Serpentis Flamsteed name 58 Ser FK5 688
Tycho2
Tycho2 5102-00416-1 Pflag RAmdeg 275.32750215 DEmdeg -2.89882468
PmRA -547.8 PmDE -700.8 E RAmdeg 3 E DEmdeg 4
E pmRA 0.3 E pmDE 0.3 EpRAm 1989.91 EpDEm 1988.94
Num 23 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.0
Q pmDE 1.0 BTmag 4.428 E BTmag 0.014 VTmag 3.337
E VTmag 0.009 Prox 999 TYC T HIP 89962
CCDM RAdeg 275.32876528 DEdeg -2.89718611 EpRA 1990 1.71
EpDE 1990 1.58 E RAdeg 3.3 E DEdeg 3.5 Posflg
Corr -0.1
SAO
SAO 142241 DelFlag RA1950 PmRA1950 -0.037
DE1950 PmDE1950 -0.697 Vmag 3.4 SpType K0
Double code Source 74 CatNum 688 DM BD-02 4599
DMcomp BDsup HD 168723 M HD 0
GC 25046 RA1950rad 4.79407513 DE1950rad -0.05084825 PmRA2000 -0.0366
PmDE2000 -0.7
Hipparcos
Catalog H HIP 89962 Proxy RAhms 18 21 18.92
DEdms -02 53 49.6 Vmag 3.23 VarFlag R Vmag H
RAdeg 275.329 DEdeg -2.89712 AstroRef Plx 52.81
CCDM 18214-0253 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 168723 BD BD-02 4599
CD CP Dm number -02 4599 VIred 0.96
SpType K0III-IV R SpType Coord arcsec 2000 182118.92-025349.6
Hipparcos 2
HIP 89962 Sn 5 So 0 Nc 1
RArad 4.8053947027 DErad -0.0505643176 Plx 53.93 PmRA -547.75
PmDE -701.42 E RArad 0.16 E DErad 0.12 E Plx 0.18
E pmRA 0.16 E pmDE 0.13 Hpmag 3.3995 E Hpmag 0.0006
SHp 0.004 VA 0 BV 0.941 E BV 0.006
VI 0.96
 
 
18213-0254 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 182132.19-025128.8 Mag 10.87 PmRA 0.00
PmDE -7.0 Tycho2 5102-00071-1 Calc delta mag 7.53 Calc coord yes
Tycho2
Tycho2 5102-00071-1 Pflag RAmdeg 275.38268703 DEmdeg -2.85972335
PmRA -1.0 PmDE -9.1 E RAmdeg 33 E DEmdeg 34
E pmRA 1.7 E pmDE 1.7 EpRAm 1972.66 EpDEm 1976.12
Num 6 Q RAmdeg 0.8 Q DEmdeg 0.8 Q pmRA 0.8
Q pmDE 0.8 BTmag 11.939 E BTmag 0.128 VTmag 10.868
E VTmag 0.082 Prox 999 TYC HIP
CCDM RAdeg 275.38271194 DEdeg -2.85969028 EpRA 1990 1.76
EpDE 1990 1.78 E RAdeg 100.2 E DEdeg 114.6 Posflg
Corr 0.0