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Current system
18455+0530
STF 2375 AB
HD 173495


Nearby doubles
28' : 18437+0539
STT 361

31' : 18465+0504
KPP4120

42' : 18429+0545
BU 136

42' : 18428+0541
TOK 324

43' : 18433+0502
J 527

46' : 18454+0444
BAL2935

46' : 18425+0518
TDT1014

49' : 18427+0556
WOL 3AB

52' : 18468+0443
TDT1051

54' : 18436+0444
A 357

55' : 18431+0612
CRT 9AB

61' : 18427+0613
CRT 22AB

67' : 18425+0439
HJ 866AB

70' : 18451+0639
HDS2658

72' : 18465+0420
TDT1050

72' : 18443+0640
CRT 6AB

76' : 18425+0631
CRT 25AB

84' : 18475+0648
TDT1057AB

84' : 18413+0433
J 2143

96' : 18391+0535
GWP2789AB

98' : 18456+0708
KPP1100

100' : 18412+0645
J 1273

107' : 18439+0346
TDS 939

108' : 18385+0504
BAL2933

109' : 18387+0451
STT 360

109' : 18388+0446
RAO 395



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

18455+0530 STF 2375 AB (HD 173495)

 
 
18h 45m 28.36s +05° 30' 00.4" P.A. 120.00 sep 2.6 mag 6.34,6.73 Sp A1V dist. 188.68 pc (615.47 l.y.)
 
 
Coord 2000 18455+0530 Discov num STF2375 Comp AB Coord arcsec 2000 18 45 28.36 +05 30 00.4
Date first 1825 Date last 2019 Obs 307
Pa first 108 Pa last 119.6 P.A. Now (θ) 119.6°
Sep first 2.2 Sep last 2.593 Sep. Now (ρ) 2.593"
Mag pri 6.34 Mag sec 6.73 delta mag (ΔM) 0.39 Spectral class A1V (white)
Pri motion ra +009 Sec motion ra +009
Pri motion dec -003 Sec motion dec -003
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)
This double is physical.
 
 
18455+0530 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 123886 18 45 28 +05 30 00 FIN 332 Aa,Ab 2021 75 142 0.0 6.91 7.31 0.40 Y
Show HD 173495 123886 18 45 28 +05 30 00 STF 2375 AB 2019 307 120 2.6 6.34 6.73 0.39 Y <===
Show 123886 18 45 28 +05 30 00 FIN 332 Ba,Bb 2021 58 324 0.1 7.48 7.48 0.00 Y
Quadruple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173495 Constellation Serpens SAO 123886 HIP 92027
Tycho2 0456-01022-2 Gaia DR2 4285283042432285568 HD 173495 HR 7048
GC 25674 ADS 11640 BD BD+05 3941 Distance 188.68
Distance ly 615.47
 
 
ORBITAL ELEMENTS
 
 
Period (P)5000y Periastron (T)557y Semi-major axis (a)3.64a
Eccentricity (e)0.5 Inclination (i)64.5° Longitude of periastron (ω)143.4°
Node (Ω)167.5° Notesn ReferenceTok2020k
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 119.5 2.555
2001 119.5 2.557
2002 119.6 2.559
2003 119.6 2.561
2004 119.7 2.564
2005 119.7 2.566
2006 119.8 2.568
2007 119.8 2.571
2008 119.9 2.573
2009 120.0 2.575
2010 120.0 2.578
2011 120.1 2.580
2012 120.1 2.582
2013 120.2 2.585
2014 120.2 2.587
2015 120.3 2.589
2016 120.3 2.592
2017 120.4 2.594
2018 120.4 2.596
2019 120.5 2.598
2020 120.5 2.601
2021 120.6 2.603
2022 120.6 2.605
2023 120.7 2.608
2024 120.7 2.610
2025 120.8 2.612
2026 120.9 2.615
2027 120.9 2.617
2028 121.0 2.619
2029 121.0 2.622
2030 121.1 2.624


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds18455%2B0530q.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 18455+0530 STF 2375 AB (HD 173495) : NOTES
 
 
discov_num notes refcode
STF2375 This remarkable quadruple system is comprised of two close (0".14)
pairs of similar position angle, discovered by Finsen with his Fin1953c
eyepiece interferometer. Our 1982 observations (McAlister et al. McA1987b
1987) were made at lower magnification and included all four stars in
the field. The resulting overlapping autocorrelation peaks precluded
measurement of the Aab or Bab pairs directly, but did permit measures
of the AB; Aa,Bb; and Ab,Ba configurations. In later observations
made at higher magnification we observed the A and B components
separately, enabling measurement of Aa,Ab and Ba,Bb but not AB.
Listed in the first speckle catalogue as STF 2375 AB,CD. McA1984b
FIN 332 Aa,Ab: Listed in the first speckle catalogue as Fin 332 AB. McA1984b
FIN 332 Ba,Bb: Listed in the first speckle catalogue as Fin 332 CD. McA1984b
 
 
REFERENCES
 
 
refcode metd author reference
Fin1953c J - Finsen, W.S. 1953MNSSA..12...86F
Fin1953c MNASSA 12, 86, 1953
McA1984b Sc j McAlister, H.A. & Hartkopf, W.I. ...................
McA1984b Catalog of Interferometric Measurements of Binary Stars, CHARA Contrib. #1, 1984
McA1984b (previously unpublished KPNO 2.1m and 3.8m data)
McA1987b Sc j McAlister, H.A., Hartkopf, W.I., Hutter, D.J., & Franz, O.G. 1987AJ.....93..688M
McA1987b AJ 93, 688, 1987
Tok2020k orb - Tokovinin, A. 2020AstL...46..612T
Tok2020k Ast. Lett. 46, 612, 2020
 
 
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
18455+0530 STF2375 AB 2007 291 120 2.5 6.34 6.73 N D 184528.36+053000.4
18455+0530 STF2375 AB 2009 295 119 2.5 6.34 6.73 N D 184528.36+053000.4
18455+0530 STF2375 AB 2010 312 121 2.6 6.34 6.73 N D 184528.36+053000.4
18455+0530 STF2375 AB 2012 319 120 2.4 6.34 6.73 N D 184528.36+053000.4
18455+0530 STF2375 AB 2013 322 120 2.6 6.34 6.73 A1V N D 184528.36+053000.4
18455+0530 STF2375 AB 2014 294 122 2.4 6.34 6.73 A1V N D 184528.36+053000.4
18455+0530 STF2375 AB 2015 296 120 2.5 6.34 6.73 A1V N 184528.36+053000.4
18455+0530 STF2375 AB 2016 300 121 2.4 6.34 6.73 A1V N 184528.36+053000.4
18455+0530 STF2375 AB 2017 302 121 2.5 6.34 6.73 A1V NV 184528.36+053000.4
18455+0530 STF2375 AB 2018 304 121 2.6 6.34 6.73 A1V NV 184528.36+053000.4
18455+0530 STF2375 AB 2019 305 120 2.6 6.34 6.73 A1V NV 184528.36+053000.4

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

 
 
WDS 18455+0530 STF 2375 AB (HD 173495) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18455+0530 STF 2375 AB (HD 173495) : MEASURES
 
 
No records found.

 
 
WDS 18455+0530 (HD 173495) : VIRTUAL EYEPIECE
 
 

18455+0530 STF2375A mag 6.34 Sp A1V 18455+0530 FIN 332Ab mag 7.31 Sp A1V 18455+0530 FIN 332B mag 7.48 Sp A1V 18455+0530 FIN 332Bb sep 0.1 P.A. 324.50 mag 7.48 Sp ... virtual eyepiece
Click on the map to see the double of your interest.
Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 18455+0530 (HD 173495) : ALADIN DSS IMAGE @ 18h 45m 28.36s +05° 30' 00.4"
 
 
 
 
WDS 18455+0530 STF 2375 AB (HD 173495) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18455+0530 STF2375AB distance=0' 18437+0539 STT 361 distance=28' 18465+0504 KPP4120 distance=31' 18429+0545 BU 136 distance=42' 18428+0541 TOK 324 distance=42' 18433+0502 J 527 distance=43' 18454+0444 BAL2935 distance=46' 18425+0518 TDT1014 distance=46' 18427+0556 WOL 3AB distance=49' 18427+0556 CRT 11AC distance=49' 18427+0556 CRT 11AD distance=49' 18427+0556 CRT 11AE distance=49' 18427+0556 CRT 11AF distance=49' 18427+0556 CRT 11AG distance=49' 18427+0556 CRT 11AH distance=49' 18427+0556 CRT 11AI distance=49' 18427+0556 CRT 11AJ distance=49' 18427+0556 CRT 11AK distance=49' 18427+0556 CRT 11AL distance=49' 18427+0556 CRT 11AM distance=49' 18427+0556 CRT 11AN distance=49' 18427+0556 CRT 11AO distance=49' 18427+0556 CRT 11AP distance=49' 18427+0556 CRT 11AQ distance=49' 18427+0556 CRT 11AR distance=49' 18427+0556 CRT 11AS distance=49' 18427+0556 CRT 11AT distance=49' 18427+0556 CRT 11AU distance=49' 18427+0556 CRT 11AV distance=49' 18427+0556 CRT 11A,Wa distance=49' 18427+0556 CRT 11A,Wb distance=49' 18427+0556 CRT 11A,Wc distance=49' 18427+0556 CRT 11A,Wd distance=49' 18427+0556 CRT 11A,We distance=49' 18427+0556 CRT 11A,Wf distance=49' 18427+0556 CRT 11A,Wg distance=49' 18427+0556 CRT 11A,Wh distance=49' 18427+0556 CRT 11A,Wi distance=49' 18427+0556 CRT 11A,Wj distance=49' 18427+0556 CRT 11A,Wk distance=49' 18427+0556 CRT 11A,Wl distance=49' 18427+0556 CRT 11A,Wm distance=49' 18427+0556 CRT 11A,Wn distance=49' 18427+0556 CRT 11A,Wo distance=49' 18427+0556 CRT 11A,Wp distance=49' 18468+0443 TDT1051 distance=52' 18436+0444 A 357 distance=54' 18431+0612 CRT 9AB distance=55' 18431+0612 CRT 9AC distance=55' 18431+0612 CRT 9AD distance=55' 18431+0612 CRT 9AE distance=55' 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 18455+0530 FIN 332 Aa,Ab 142 0.0
Show 18455+0530 STF2375 AB 120 2.6
Show 18455+0530 FIN 332 Ba,Bb 324 0.1
Show 18437+0539 STT 361 172 22.6 28
Show 18465+0504 KPP4120 1 1.8 31
Show 18429+0545 BU 136 7 4.6 42
Show 18428+0541 TOK 324 246 222.4 42
Show 18433+0502 J 527 40 3.2 43
Show 18454+0444 BAL2935 161 5.8 46
Show 18425+0518 TDT1014 339 0.7 46
Show 18427+0556 WOL 3 AB 307 2.5 49
Show 18427+0556 CRT 11 AC 163 3.1 49
Show 18427+0556 CRT 11 AD 223 4.1 49
Show 18427+0556 CRT 11 AE 217 7.6 49
Show 18427+0556 CRT 11 AF 56 8.0 49
Show 18427+0556 CRT 11 AG 263 8.8 49
Show 18427+0556 CRT 11 AH 5 10.4 49
Show 18427+0556 CRT 11 AI 113 10.8 49
Show 18427+0556 CRT 11 AJ 211 11.0 49
Show 18427+0556 CRT 11 AK 159 11.3 49
Show 18427+0556 CRT 11 AL 119 11.4 49
Show 18427+0556 CRT 11 AM 206 11.7 49
Show 18427+0556 CRT 11 AN 104 12.0 49
Show 18427+0556 CRT 11 AO 235 12.0 49
Show 18427+0556 CRT 11 AP 256 12.3 49
Show 18427+0556 CRT 11 AQ 178 12.8 49
Show 18427+0556 CRT 11 AR 13 12.8 49
Show 18427+0556 CRT 11 AS 4 13.4 49
Show 18427+0556 CRT 11 AT 293 13.5 49
Show 18427+0556 CRT 11 AU 94 14.5 49
Show 18427+0556 CRT 11 AV 102 14.8 49
Show 18427+0556 CRT 11 A,Wa 31 16.1 49
Show 18427+0556 CRT 11 A,Wb 164 16.4 49
Show 18427+0556 CRT 11 A,Wc 311 16.5 49
Show 18427+0556 CRT 11 A,Wd 237 16.7 49
Show 18427+0556 CRT 11 A,We 177 17.4 49
Show 18427+0556 CRT 11 A,Wf 50 17.6 49
Show 18427+0556 CRT 11 A,Wg 26 18.0 49
Show 18427+0556 CRT 11 A,Wh 221 18.2 49
Show 18427+0556 CRT 11 A,Wi 233 18.4 49
Show 18427+0556 CRT 11 A,Wj 77 18.8 49
Show 18427+0556 CRT 11 A,Wk 62 18.9 49
Show 18427+0556 CRT 11 A,Wl 292 18.9 49
Show 18427+0556 CRT 11 A,Wm 31 19.6 49
Show 18427+0556 CRT 11 A,Wn 120 19.6 49
Show 18427+0556 CRT 11 A,Wo 315 19.7 49
Show 18427+0556 CRT 11 A,Wp 332 20.0 49
Show 18468+0443 TDT1051 168 1.6 52
Show 18436+0444 A 357 71 0.6 54
Show 18431+0612 CRT 9 AB 271 4.4 55
Show 18431+0612 CRT 9 AC 258 4.6 55

 
 
WDS 18455+0530 : COMPONENTS
 
 
  A Ab B
Ab pa=141.8°
sep=0.01"
 
B pa=0.0°
sep=0.00"
pa=321.8°
sep=0.01"
 
Bb pa=324.5°
sep=0.12"
pa=324.3°
sep=0.14"
pa=324.5°
sep=0.12"
 
 
18455+0530 A
 
 
Name HD 173495 Coord arcsec 2000 184528.36+053000.4 Mag 6.34 Spectral class A1V (white)
PmRA 9.00 PmDE -3.0 SAO 123886 HIP 92027
Tycho2 0456-01022-2 HD 173495 HR 7048 GC 25674
ADS 11640 BD BD+05 3941
Tycho2
Tycho2 0456-01022-2 Pflag P RAmdeg 281.36838204 DEmdeg 5.50000042
PmRA 9.4 PmDE -2.5 E RAmdeg 4 E DEmdeg 4
E pmRA 2.0 E pmDE 1.9 EpRAm 1991.76 EpDEm 1991.68
Num 5 Q RAmdeg 1.5 Q DEmdeg 0.5 Q pmRA 1.5
Q pmDE 0.5 BTmag 6.375 E BTmag 0.014 VTmag 6.338
E VTmag 0.010 Prox 25 TYC T HIP 92027
CCDM A RAdeg 281.36815306 DEdeg 5.50012167 EpRA 1990 1.82
EpDE 1990 1.74 E RAdeg 3.8 E DEdeg 4.2 Posflg D
Corr 0.1
SAO
SAO 123886 DelFlag RA1950 PmRA1950 0.0008
DE1950 PmDE1950 -0.01 Vmag 5.7 SpType A0
Double code Source 70 CatNum 25674 DM BD+05 3941
DMcomp BDsup HD 173495 M HD 0
GC 25674 RA1950rad 4.90007521 DE1950rad 0.09505659 PmRA2000 0.001
PmDE2000 -0.011
Hipparcos
Catalog H HIP 92027 Proxy H RAhms 18 45 28.36
DEdms +05 30 00.4 Vmag 5.82 VarFlag R Vmag G
RAdeg 281.368 DEdeg 5.50012 AstroRef A Plx 4.6
CCDM 18455+0530 N CCDM I Nsys 1 Ncomp 3
MultFlag C Source Qual B M HIP
Theta Rho HD 173495 BD BD+05 3941
CD CP Dm number +05 3941 VIred 0.06
SpType A1V R SpType Coord arcsec 2000 184528.36+053000.4
Hipparcos 2
HIP 92027 Sn 15 So 3 Nc 3
RArad 4.9108006148 DErad 0.0959952549 Plx 5.3 PmRA 14.32
PmDE 0.16 E RArad 0.72 E DErad 0.64 E Plx 0.85
E pmRA 1.04 E pmDE 0.87 Hpmag 5.8291 E Hpmag 0.0008
SHp 0.005 VA 0 BV 0.041 E BV 0.006
VI 0.06
CCDM
Ccdm 18455+0530 RComp Comp A Note1
Note2 Discov num DRAs -1.55 DDEs 0.0
R dRAs 10 Year Theta Rho
Obs 4 Vmag 6.5 Sp A0 PmNote *
PmRA 27 PmDE -1 Dm number +05 3941 Cat1 BD
Name2 +05 2590 Cat2 AGK2/3 HD 173495 M HD
ADS BDS A11640 M ADS BDS N IDS IDS 18406N0524A
HIC 92027
 
 
18455+0530 Ab
 
 
Coord arcsec 2000 184528.36+053000.4 Mag 7.31 Spectral class A1V (white) Calc delta mag 0.4
Calc coord yes
 
 
18455+0530 B
 
 
Coord arcsec 2000 184528.36+053000.4 Coord calc 184528.51+052959.1 Mag 7.48 Mag composta 6.73
Spectral class A1V (white) PmRA 9.00 PmDE -3.0 Calc delta mag 0.57
 
 
18455+0530 Bb
 
 
Coord arcsec 2000 184528.36+053000.5 Mag 7.48 Spectral class ... PmRA 9.00
PmDE -3.0 Calc delta mag 0.57 Calc coord yes