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Current system
19040-3804
I 1391
HD 176891


Nearby doubles
17' : 19026-3800
RST2083

23' : 19056-3754
RST2086

31' : 19065-3808
COO 231

51' : 19079-3825
RST2088

53' : 19031-3713
REP 48

66' : 19051-3908
RST2084

66' : 19043-3659
KOH 116

66' : 19081-3720
UC 3812

67' : 19064-3704
HJ 5084

69' : 19025-3658
KOH 115

70' : 19011-3704
BSO 14AB

71' : 19020-3658
BYJ 1

71' : 19097-3745
KPP1406

71' : 19024-3656
REP 4

72' : 19019-3657
VSP 1

74' : 18578-3802
B 414

75' : 19011-3657
JOY 7

76' : 18598-3707
BOY 15

76' : 19016-3653
B 957AB

77' : 19021-3917
B 420

77' : 18592-3712
WLT 2

79' : 19092-3853
UC 3824

80' : 19005-3656
KOH 112

80' : 18588-3713
I 1114

83' : 18576-3733
KOH 111

84' : 19036-3927
B 421



Selections
Full WDS
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.

19040-3804 I 1391 (HD 176891)

 
 
19h 03m 58.43s -38° 04' 02.0" P.A. 120.00 sep 0.3 mag 9.91,9.71 Sp G5V dist. 120.48 pc (393.01 l.y.)
 
 
Coord 2000 19040-3804 Discov num I  1391 Comp Coord arcsec 2000 19 03 58.43 -38 04 02.0
Date first 1926 Date last 2021 Obs 24
Pa first 114 Pa last 119.7 P.A. Now (θ) 126.5°
Sep first 0.5 Sep last 0.264 Sep. Now (ρ) 0.253"
Mag pri 9.91 Mag sec 9.71 delta mag (ΔM) 0.2 Spectral class G5V (yellow)
Pri motion ra +005 Sec motion ra
Pri motion dec -038 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 176891 Constellation Corona Austrina SAO 210867 HIP 93625
Tycho2 7917-00132-1 Gaia DR2 6718711044440095232 HD 176891 GC 26196
CD CD-3813306 CP CP-38 7691 Distance 120.48 Distance ly 393.01
 
 
ORBITAL ELEMENTS
 
 
Period (P)47.38y± 0.22 Periastron (T)2006.14y± 0.23 Semi-major axis (a)0.178a± 0.003
Eccentricity (e)0.641± 0.019 Inclination (i)35.8°± 1.3 Longitude of periastron (ω)56.4°± 5.7
Node (Ω)271.3°± 5.2 Notes ReferenceTok2015c
Equinox2000 Last observation2014 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 207.8 0.138
2001 216.4 0.127
2002 226.6 0.115
2003 239.3 0.103
2004 255.7 0.089
2005 278.9 0.073
2006 315.4 0.057
2007 5.3 0.056
2008 42.1 0.075
2009 62.5 0.099
2010 75.0 0.121
2011 83.7 0.142
2012 90.3 0.160
2013 95.7 0.175
2014 100.2 0.189
2015 104.1 0.201
2016 107.6 0.212
2017 110.8 0.221
2018 113.8 0.229
2019 116.5 0.236
2020 119.2 0.242
2021 121.7 0.246
2022 124.1 0.250
2023 126.5 0.253
2024 128.8 0.256
2025 131.1 0.257
2026 133.3 0.258
2027 135.6 0.258
2028 137.8 0.258
2029 140.1 0.257
2030 142.4 0.255


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


 
  


wds19040-3804b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 19040-3804 I 1391 (HD 176891) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Tok2015c orb+j Tokovinin, A., Mason, B.D., Hartkopf, W.I., Mendez, R.A., & Horch, E.P. 2015AJ....150...50T
Tok2015c +St AJ 150, 50, 2015 (some measures corrected in Tok2017b) 2017AJ....154..110T
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19040-3804 I 1391 1991 18 156 0.2 9.91 9.71 G5V NO 190358.43-380402.0
19040-3804 I 1391 2009 20 66 0.1 9.91 9.71 G5V NO 190358.43-380402.0
19040-3804 I 1391 2014 21 103 0.2 9.91 9.71 G5V O 190358.43-380402.0
19040-3804 I 1391 2017 22 111 0.2 9.91 9.71 G5V O 190358.43-380402.0
19040-3804 I 1391 2019 23 116 0.3 9.91 9.71 G5V O 190358.43-380402.0
19040-3804 I 1391 2021 24 120 0.3 9.91 9.71 G5V O 190358.43-380402.0

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

 
 
WDS 19040-3804 I 1391 (HD 176891) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 19040-3804 I 1391 (HD 176891) : MEASURES
 
 
No records found.

 
 
WDS 19040-3804 (HD 176891) : VIRTUAL EYEPIECE
 
 

19040-3804 I 1391A mag 9.91 Sp G5V 19040-3804 I 1391B sep 0.2 P.A. 125.90 mag 9.71 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 19040-3804 (HD 176891) : ALADIN DSS IMAGE @ 19h 03m 58.43s -38° 04' 02.0"
 
 
 
 
WDS 19040-3804 I 1391 (HD 176891) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

19040-3804 I 1391 distance=0' 19026-3800 RST2083 distance=17' 19056-3754 RST2086 distance=23' 19065-3808 COO 231 distance=31' 19079-3825 RST2088 distance=51' 19031-3713 REP 48 distance=53' 19051-3908 RST2084 distance=66' 19043-3659 KOH 116 distance=66' 19081-3720 UC 3812 distance=66' 19064-3704 HJ 5084 distance=67' 19025-3658 KOH 115 distance=69' 19011-3704 KOH 113Aa,Ab distance=70' 19011-3704 BSO 14AB distance=70' 19020-3658 BYJ 1 distance=71' 19097-3745 KPP1406 distance=71' 19024-3656 REP 4 distance=71' 19019-3657 VSP 1 distance=72' 18578-3802 B 414 distance=74' 19011-3657 JOY 7 distance=75' 18598-3707 BOY 15 distance=76' 19016-3653 B 957AB distance=76' 19016-3653 B 957AC distance=76' 19016-3653 CVN 13Ca,Cb distance=77' 19021-3917 B 420 distance=77' 18592-3712 WLT 2 distance=77' 19092-3853 UC 3824 distance=79' 19005-3656 KOH 112 distance=80' 18588-3713 I 1114 distance=80' 18576-3733 KOH 111 distance=83' 19036-3927 B 421 distance=84' 19017-3645 KOH 114 distance=85' 19113-3757 UC 3837 distance=88' 19046-3635 BRT1796 distance=89' 19005-3923 WIS 332 distance=89' 18568-3734 UC 3734 distance=91' 19013-3632 BRT1793 distance=98' 19054-3943 RST2085 distance=101' 19107-3659 KOH 117 distance=104' 19002-3938 UC 3753 distance=104' 18592-3932 HJ 5074 distance=105' 19118-3717 B 2472 distance=105' 19019-3620 B 958 distance=107' 18552-3843 VOU 98AB distance=110' 18552-3843 VOU 98AC distance=110' 19002-3945 WG 240 distance=110' 19075-3622 B 963AB distance=110' 19075-3622 B 963AC distance=110' 18559-3712 UC 3728 distance=110' 18552-3722 UC 3722 distance=112' 19074-3620 UC 3807 distance=112' 18573-3643 WLT 1AB distance=114' 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 19040-3804 I 1391 120 0.3
Show 19026-3800 RST2083 21 4.2 17
Show 19056-3754 RST2086 20 4.8 23
Show 19065-3808 COO 231 198 6.2 31
Show 19079-3825 RST2088 306 0.7 51
Show 19031-3713 REP 48 44 2.1 53
Show 19051-3908 RST2084 108 1.7 66
Show 19043-3659 KOH 116 278 0.2 66
Show 19081-3720 UC 3812 271 28.3 66
Show 19064-3704 HJ 5084 322 1.5 67
Show 19025-3658 KOH 115 339 0.2 69
Show 19011-3704 KOH 113 Aa,Ab 99 0.1 70
Show 19011-3704 BSO 14 AB 280 12.8 70
Show 19020-3658 BYJ 1 -1 -1.0 71
Show 19097-3745 KPP1406 181 10.5 71
Show 19024-3656 REP 4 58 4.5 71
Show 19019-3657 VSP 1 134 0.2 72
Show 18578-3802 B 414 208 4.3 74
Show 19011-3657 JOY 7 154 1.3 75
Show 18598-3707 BOY 15 279 0.1 76
Show 19016-3653 B 957 AB 137 4.1 76
Show 19016-3653 B 957 AC 23 57.6 76
Show 19016-3653 CVN 13 Ca,Cb 189 0.3 77
Show 19021-3917 B 420 110 0.5 77
Show 18592-3712 WLT 2 46 2.4 77
Show 19092-3853 UC 3824 171 44.6 79
Show 19005-3656 KOH 112 110 0.1 80
Show 18588-3713 I 1114 279 1.3 80
Show 18576-3733 KOH 111 282 2.9 83
Show 19036-3927 B 421 40 5.4 84
Show 19017-3645 KOH 114 46 0.9 85
Show 19113-3757 UC 3837 16 99.5 88
Show 19046-3635 BRT1796 257 5.4 89
Show 19005-3923 WIS 332 194 999.9 89
Show 18568-3734 UC 3734 32 49.8 91
Show 19013-3632 BRT1793 146 3.0 98
Show 19054-3943 RST2085 124 3.3 101
Show 19107-3659 KOH 117 46 1.3 104
Show 19002-3938 UC 3753 259 49.5 104
Show 18592-3932 HJ 5074 246 16.1 105
Show 19118-3717 B 2472 231 0.9 105
Show 19019-3620 B 958 149 3.9 107
Show 18552-3843 VOU 98 AB 197 2.5 110
Show 18552-3843 VOU 98 AC 262 8.2 110
Show 19002-3945 WG 240 206 5.3 110
Show 19075-3622 B 963 AB 62 3.1 110
Show 19075-3622 B 963 AC 93 20.9 110
Show 18559-3712 UC 3728 335 61.4 110
Show 18552-3722 UC 3722 32 94.9 112
Show 19074-3620 UC 3807 168 18.8 112
Show 18573-3643 WLT 1 AB 306 42.2 114

 
 
WDS 19040-3804 : COMPONENTS
 
 
  A
B pa=125.9°
sep=0.22"
 
 
19040-3804 A
 
 
Componente originario normalizzato AB Name HD 176891 Coord arcsec 2000 190358.43-380402.0 Mag 9.91
Spectral class G5V (yellow) PmRA 5.00 PmDE -38.0 SAO 210867
HIP 93625 HD 176891 GC 26196 CD CD-3813306
CP CP-38 7691
SAO
SAO 210867 DelFlag RA1950 PmRA1950 -0.0002
DE1950 PmDE1950 -0.054 Vmag 8.8 SpType G0
Double code Source 70 CatNum 26196 DM CD-3813306
DMcomp BDsup HD 176891 M HD 0
GC 26196 RA1950rad 4.97666766 DE1950rad -0.66570011 PmRA2000 -0.0002
PmDE2000 -0.055
Hipparcos
Catalog H HIP 93625 Proxy H RAhms 19 03 58.43
DEdms -38 04 02.0 Vmag 8.91 VarFlag R Vmag G
RAdeg 285.993 DEdeg -38.0672 AstroRef * Plx 9.89
CCDM 19040-3804 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source S Qual A M HIP AS
Theta 336 Rho 0.178 HD 176891 BD
CD CD-3813306 CP CP-38 7691 Dm number -3813306 VIred 0.72
SpType G5V R SpType Coord arcsec 2000 190358.43-380402.0
Hipparcos 2
HIP 93625 Sn 55 So 3 Nc 2
RArad 4.9915277658 DErad -0.6643983867 Plx 8.3 PmRA 11.6
PmDE -31.35 E RArad 1.39 E DErad 0.87 E Plx 1.5
E pmRA 2.67 E pmDE 1.47 Hpmag 9.0556 E Hpmag 0.0031
SHp 0.02 VA 0 BV 0.66 E BV 0.015
VI 0.72
CCDM
Ccdm 19040-3804 RComp Comp A Note1
Note2 Discov num DRAs -1.64 DDEs -4.1
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.6 Sp G0 PmNote *
PmRA -2 PmDE -54 Dm number -3813306 Cat1 CD
Name2 210867 Cat2 SAO HD 176891 M HD
ADS BDS M ADS BDS N IDS IDS 18572S3813A
HIC 93625
 
 
19040-3804 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 190358.45-380402.1 Mag 9.71 Tycho2 7917-00132-1
Calc delta mag 0.2 Calc coord yes
Tycho2
Tycho2 7917-00132-1 Pflag RAmdeg 285.99352104 DEmdeg -38.06729011
PmRA 13.7 PmDE -28.4 E RAmdeg 11 E DEmdeg 16
E pmRA 1.7 E pmDE 1.6 EpRAm 1991.25 EpDEm 1990.30
Num 10 Q RAmdeg 1.2 Q DEmdeg 0.9 Q pmRA 1.2
Q pmDE 1.0 BTmag 9.749 E BTmag 0.027 VTmag 9.046
E VTmag 0.021 Prox 999 TYC T HIP 93625
CCDM AS RAdeg 285.99348083 DEdeg -38.06722361 EpRA 1990 1.85
EpDE 1990 1.64 E RAdeg 10.6 E DEdeg 16.3 Posflg P
Corr 0.1
CCDM
Ccdm 19040-3804 RComp Comp B Note1 *
Note2 Discov num I 1391 DRAs DDEs
R dRAs Year 1959 Theta 215 Rho 0.1
Obs 11 Vmag 9.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 18572S3813B
HIC 93625