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Doubles in session


Current system
18449-5029
HDS 2656
HD 172821


Nearby doubles
8' : 18454-5025
R 313

16' : 18463-5036
CPO 597

19' : 18433-5040
UC 3655

30' : 18418-5035
RST 997

31' : 18469-5054
RST1001

32' : 18474-5050
HJ 5058AB

36' : 18473-5056
CPO 598

36' : 18435-5103
I 1378

39' : 18410-5021
BRT1074

40' : 18423-4958
UC 3647

41' : 18472-5103
I 1383AB

47' : 18495-5042
B 1372AB

53' : 18450-5122
RST5452

54' : 18488-5108
DAW 223

58' : 18474-4938
HJ 5059AB

61' : 18451-4929
BRT1075

67' : 18379-5028
UC 3629

70' : 18436-5138
RST5451AB

72' : 18522-5015
UC 3702

73' : 18520-5007
UC 3701

75' : 18370-5035
BRT1069

77' : 18393-5126
RST 995

79' : 18488-4920
UC 3681

80' : 18509-4935
SKF1151

81' : 18528-5057
HJ 5067

82' : 18531-5011
CVN 61AB



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

18449-5029 HDS 2656 (HD 172821)

 
 
18h 44m 51.08s -50° 29' 26.2" P.A. 230.00 sep 0.6 mag 8.85,11.75 Sp A9IV/V dist. 483.09 pc (1575.84 l.y.)
 
 
Coord 2000 18449-5029 Discov num HDS2656 Comp Coord arcsec 2000 18 44 51.08 -50 29 26.2
Date first 1991 Date last 2021 Obs 2
Pa first 234 Pa last 230.1 P.A. Now (θ) 230.1°
Sep first 0.5 Sep last 0.585 Sep. Now (ρ) 0.585"
Mag pri 8.85 Mag sec 11.75 delta mag (ΔM) 2.9 Spectral class A9IV/V (white)
Pri motion ra -007 Sec motion ra
Pri motion dec -012 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 172821 Constellation Telescopium SAO 245677 HIP 91979
Tycho2 8368-01738-1 Gaia DR2 6655815161100949632 HD 172821 CD CD-5012112
CP CP-5010809 Distance 483.09 Distance ly 1575.84
 
 
WDS 18449-5029 HDS 2656 (HD 172821) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
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
18449-5029 HDS2656 1991 1 234 0.5 8.85 11.75 A9IV/V 184451.08-502926.2
18449-5029 HDS2656 2021 2 230 0.6 8.85 11.75 A9IV/V 184451.08-502926.2

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

 
 
WDS 18449-5029 HDS 2656 (HD 172821) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18449-5029 HDS 2656 (HD 172821) : MEASURES
 
 
No records found.

 
 
WDS 18449-5029 (HD 172821) : VIRTUAL EYEPIECE
 
 

18449-5029 HDS2656A mag 8.85 Sp A9IV/V 18449-5029 HDS2656B sep 0.5 P.A. 217.30 mag 11.75 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 18449-5029 (HD 172821) : ALADIN DSS IMAGE @ 18h 44m 51.08s -50° 29' 26.2"
 
 
 
 
WDS 18449-5029 HDS 2656 (HD 172821) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18449-5029 HDS2656 distance=0' 18454-5025 R 313 distance=8' 18463-5036 CPO 597 distance=16' 18433-5040 UC 3655 distance=19' 18418-5035 RST 997 distance=30' 18469-5054 RST1001 distance=31' 18474-5050 HJ 5058AB distance=32' 18473-5056 CPO 598 distance=36' 18435-5103 I 1378 distance=36' 18410-5021 BRT1074 distance=39' 18423-4958 UC 3647 distance=40' 18472-5103 I 1383AB distance=41' 18472-5103 I 1383AC distance=41' 18495-5042 B 1372AB distance=47' 18495-5042 DAW 22AC distance=47' 18450-5122 RST5452 distance=53' 18488-5108 DAW 223 distance=54' 18474-4938 HJ 5059AB distance=58' 18474-4938 HJ 5059AC distance=58' 18451-4929 BRT1075 distance=61' 18379-5028 UC 3629 distance=67' 18436-5138 RST5451Ba,Bb distance=70' 18436-5138 RST5451AB distance=70' 18522-5015 UC 3702 distance=72' 18520-5007 UC 3701 distance=73' 18370-5035 BRT1069 distance=75' 18393-5126 RST 995 distance=77' 18488-4920 UC 3681 distance=79' 18509-4935 SKF1151 distance=80' 18528-5057 HJ 5067 distance=81' 18531-5011 MUG 10Aa,Ab distance=82' 18531-5011 CVN 61AB distance=82' 18531-5011 CVN 61AC distance=82' 18531-5011 CVN 61AD distance=82' 18531-5011 CVN 61AE distance=82' 18520-5122 I 1384 distance=86' 18364-4952 CPO 592 distance=89' 18357-5010 BRT1067 distance=90' 18387-4922 HDS2642 distance=91' 18459-5201 RST1000 distance=91' 18538-5111 I 1386 distance=94' 18419-5202 UC 3640 distance=97' 18547-5008 CBL 174 distance=97' 18471-4853 RST1002 distance=99' 18352-5120 HU 1607AB distance=104' 18340-5043 I 1024 distance=105' 18455-5216 TOI1122 distance=107' 18541-5131 RST1008 distance=107' 18500-5207 HDS2669 distance=109' 18562-5049 RST1011 distance=111' 18494-4847 I 1100 distance=112' 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 18449-5029 HDS2656 230 0.6
Show 18454-5025 R 313 37 53.9 8
Show 18463-5036 CPO 597 36 7.7 16
Show 18433-5040 UC 3655 209 27.3 19
Show 18418-5035 RST 997 267 2.6 30
Show 18469-5054 RST1001 69 1.6 31
Show 18474-5050 HJ 5058 AB 341 11.7 32
Show 18473-5056 CPO 598 94 4.1 36
Show 18435-5103 I 1378 28 4.3 36
Show 18410-5021 BRT1074 280 4.2 39
Show 18423-4958 UC 3647 226 49.9 40
Show 18472-5103 I 1383 AB 247 0.6 41
Show 18472-5103 I 1383 AC 334 34.8 41
Show 18495-5042 B 1372 AB 123 2.8 47
Show 18495-5042 DAW 22 AC 20 12.4 47
Show 18450-5122 RST5452 259 0.1 53
Show 18488-5108 DAW 223 1 3.6 54
Show 18474-4938 HJ 5059 AB 241 24.7 58
Show 18474-4938 HJ 5059 AC 200 30.0 58
Show 18451-4929 BRT1075 166 4.7 61
Show 18379-5028 UC 3629 66 55.4 67
Show 18436-5138 RST5451 Ba,Bb 242 0.2 70
Show 18436-5138 RST5451 AB 305 0.8 70
Show 18522-5015 UC 3702 136 16.0 72
Show 18520-5007 UC 3701 257 41.7 73
Show 18370-5035 BRT1069 48 3.1 75
Show 18393-5126 RST 995 282 1.4 77
Show 18488-4920 UC 3681 268 43.1 79
Show 18509-4935 SKF1151 121 9.9 80
Show 18528-5057 HJ 5067 274 2.9 81
Show 18531-5011 MUG 10 Aa,Ab 60 0.4 82
Show 18531-5011 CVN 61 AB 166 4.0 82
Show 18531-5011 CVN 61 AC 336 8.3 82
Show 18531-5011 CVN 61 AD 160 9.0 82
Show 18531-5011 CVN 61 AE 128 10.7 82
Show 18520-5122 I 1384 50 1.8 86
Show 18364-4952 CPO 592 295 3.8 89
Show 18357-5010 BRT1067 46 3.9 90
Show 18387-4922 HDS2642 176 1.4 91
Show 18459-5201 RST1000 74 2.0 91
Show 18538-5111 I 1386 61 0.4 94
Show 18419-5202 UC 3640 317 8.2 97
Show 18547-5008 CBL 174 280 27.5 97
Show 18471-4853 RST1002 71 0.2 99
Show 18352-5120 HU 1607 AB 264 2.1 104
Show 18340-5043 I 1024 95 3.0 105
Show 18455-5216 TOI1122 35 0.5 107
Show 18541-5131 RST1008 140 3.1 107
Show 18500-5207 HDS2669 182 0.6 109
Show 18562-5049 RST1011 89 0.7 111
Show 18494-4847 I 1100 33 1.1 112

 
 
WDS 18449-5029 : COMPONENTS
 
 
  A
B pa=217.3°
sep=0.47"
 
 
18449-5029 A
 
 
Componente originario normalizzato AB Name HD 172821 Coord arcsec 2000 184451.08-502926.2 Mag 8.85
Spectral class A9IV/V (white) PmRA -7.00 PmDE -12.0 SAO 245677
HIP 91979 Tycho2 8368-01738-1 HD 172821 CD CD-5012112
CP CP-5010809
Tycho2
Tycho2 8368-01738-1 Pflag RAmdeg 281.21281393 DEmdeg -50.49063218
PmRA -3.1 PmDE -12.6 E RAmdeg 8 E DEmdeg 11
E pmRA 1.6 E pmDE 1.5 EpRAm 1991.38 EpDEm 1990.84
Num 8 Q RAmdeg 1.0 Q DEmdeg 1.0 Q pmRA 1.1
Q pmDE 1.1 BTmag 9.077 E BTmag 0.020 VTmag 8.717
E VTmag 0.016 Prox 999 TYC T HIP 91979
CCDM AB RAdeg 281.21282528 DEdeg -50.49060250 EpRA 1990 1.76
EpDE 1990 1.62 E RAdeg 8.4 E DEdeg 10.6 Posflg P
Corr 0.0
SAO
SAO 245677 DelFlag RA1950 PmRA1950 -0.0011
DE1950 PmDE1950 0 Vmag 8.5 SpType F0
Double code Source 48 CatNum 17624 DM CP-5010809
DMcomp BDsup HD 172821 M HD 0
GC RA1950rad 4.89110735 DE1950rad -0.882125 PmRA2000 -0.0014
PmDE2000 -0.003
Hipparcos
Catalog H HIP 91979 Proxy H RAhms 18 44 51.08
DEdms -50 29 26.2 Vmag 8.7 VarFlag R Vmag H
RAdeg 281.213 DEdeg -50.4906 AstroRef A Plx 4.43
CCDM 18449-5029 N CCDM H Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 234 Rho 0.527 HD 172821 BD
CD CD-5012112 CP CP-5010809 Dm number -5012112 VIred 0.29
SpType A9IV/V R SpType Coord arcsec 2000 184451.08-502926.2
Hipparcos 2
HIP 91979 Sn 15 So 3 Nc 2
RArad 4.9080898679 DErad -0.8812271893 Plx 2.07 PmRA -7.81
PmDE -11.92 E RArad 1.46 E DErad 1.15 E Plx 1.64
E pmRA 2.07 E pmDE 1.37 Hpmag 8.778 E Hpmag 0.0026
SHp 0.022 VA 0 BV 0.296 E BV 0.023
VI 0.34
CCDM
Ccdm 18449-5029 RComp Comp A Note1
Note2 Discov num DRAs -2.93 DDEs -26.3
R dRAs 82 Year Theta Rho
Obs 2 Vmag 8.9 Sp A9 PmNote *
PmRA -7 PmDE -12 Dm number -5012112 Cat1 CD
Name2 245677 Cat2 SAO HD 172821 M HD
ADS BDS M ADS BDS N IDS IDS
HIC 91979
 
 
18449-5029 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 184451.05-502926.6 Mag 11.75 Calc delta mag 2.9
Calc coord yes
CCDM
Ccdm 18449-5029 RComp Comp B Note1
Note2 Discov num HDS DRAs -2.98 DDEs -26.6
R dRAs 82 Year 1991 Theta 234 Rho 0.5
Obs 1 Vmag 11.7 Sp PmNote *
PmRA -7 PmDE -12 Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS
HIC 91979