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Current system
19531-2126
HJ 2902
HD 187908


Nearby doubles
33' : 19535-2054
ARA1572

39' : 19536-2048
LDS4822

45' : 19559-2103
ARA1573

46' : 19563-2138
LDS 694

59' : 19562-2206
BRT1556

62' : 19488-2129
TDS1016

62' : 19512-2030
TDT1804

64' : 19575-2108
BRT1557

65' : 19537-2022
UC 4046

66' : 19578-2132
CRI 25AB

68' : 19501-2034
TDT1788

68' : 19512-2023
SHN 240

72' : 19552-2021
HLD 36

73' : 19579-2056
ARA1575

77' : 19567-2029
DON 973

78' : 19480-2057
HDS2815

81' : 19524-2246
OCC 188

82' : 19475-2150
STN 49

84' : 19480-2211
DON 968

90' : 19592-2155
LDS 697

92' : 19490-2236
DON 969

93' : 19465-2131
BU 467

101' : 19548-1949
GWP2907

102' : 19496-2254
UC 4031

102' : 19460-2142
LDS4817

102' : 19459-2113
ARA1571



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.

19531-2126 HJ 2902 (HD 187908)

 
 
19h 53m 07.60s -21° 25' 49.9" P.A. 31.00 sep 16.2 mag 10.30,10.33 Sp F5V
 
 
Coord 2000 19531-2126 Discov num HJ 2902 Comp Coord arcsec 2000 19 53 07.60 -21 25 49.9
Date first 1831 Date last 2016 Obs 11
Pa first 34 Pa last 31 P.A. Now (θ) 31°
Sep first 15.0 Sep last 16.169 Sep. Now (ρ) 16.169"
Mag pri 10.30 Mag sec 10.33 delta mag (ΔM) 0.03 Spectral class F5V (yellow-white)
Pri motion ra +012 Sec motion ra +009
Pri motion dec -040 Sec motion dec -041
Notes V (Proper motion indicates physical)
rPM=0.075 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 187908 Constellation Sagittarius SAO 188674 Tycho2 6325-02156-1
Gaia DR2 6865229386977637888 HD 187908
 
 
WDS 19531-2126 HJ 2902 (HD 187908) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
HJ_1826 Mb - Herschel, J.F.W. 1826MmRAS...2..459H
HJ_1826 MemRAS 2, 459, 1826
HJ_1829a Mb - Herschel, J.F.W. 1829MmRAS...3...47H
HJ_1829a MemRAS 3, 47, 1829
HJ_1829b Mb - Herschel, J.F.W. 1829MmRAS...3..177H
HJ_1829b MemRAS 3, 177, 1829
HJ_1831 Ma - Herschel, J.F.W. 1831MmRAS...4..331H
HJ_1831 +Mb MemRAS 4, part 2, 331, 1831
HJ_1833a Ma - Herschel, J.F.W. 1833MmRAS...5...13H
HJ_1833a +Mb MemRAS 5, 13, 1833
HJ_1833b orb - Herschel, J.F.W. 1833MmRAS...5..171H
HJ_1833b MemRAS 5, 171, 1833
HJ_1833c Mb - Herschel, J.F.W. 1833MmRAS...6....1H
HJ_1833c MemRAS 6, 1, 1833
HJ_1833d orb - Herschel, J.F.W. 1833MmRAS...6..149H
HJ_1833d MemRAS 6, 149, 1833
HJ_1835 Ma - Herschel, J.F.W. 1835MmRAS...8...37H
HJ_1835 +Mb MemRAS 8, 37, 1835
HJ_1836 Mb - Herschel, J.F.W. 1836MmRAS...9..193H
HJ_1836 MemRAS 9, 193, 1836
HJ_1847a Ma j Herschel, J.F.W. .
HJ_1847a +Mb Cape Results, London, 1847 (Cape of Good Hope Astronomical Observations 1834-1838)
HJ_1847b Ma j Herschel, J.F.W. .
HJ_1847b Cape Results, London, 1847
HJ_1850 orb - Herschel, J.F.W. 1850MmRAS..18...47H
HJ_1850 MemRAS 18, 47, 1850
HJ_1870 Mb - Herschel, J.F.W. 1870MmRAS..38....1H
HJ_1870 MemRAS 38, 1, 1870
HJ_1874A - Herschel, J.F.W. 1874MNRAS..35...28B
HJ_1874A cited by Burnham (MNRAS 35, 28, 1874)
HJ_1875A Ma - Herschel, J.F.W. 1875AN.....85..323D
HJ_1875A +Mb cited by Doberck, 1875 (see Dob1875b,f,g,h)
HJ_1880A Ma - Herschel, J.F.W. 1880Obs.....3..508G
HJ_1880A +Mb cited by Gledhill (Obs 3, 508, 1880)
HJ_1880B Mb - Herschel, J.F.W. 1880MNRAS..40..497B
HJ_1880B cited by Burnham (MNRAS 40, 497, 1880)
HJ_1897A Ma j Herschel, J.F.W. 1897MNRAS..57..541S
HJ_1897A cited by See (MNRAS 57, 541, 1897)
HJ_1905A Ma - Herschel, J.F.W. 1905LicOB...3..147A
HJ_1905A +Mb cited by Aitken (Lick Obs. Bull. 3, 147, 1905)
HJ_1906A Ma - Herschel, J.F.W. 1906MmRAS..56....1L
HJ_1906A +Mb cited by Lewis (MemRAS 56, 1, 1906)
HJ_1906B Ma - Herschel, J.F.W. 1906QB821.B972.....
HJ_1906B +Mb cited in BDS (Burnham Double Star Cat.), 1906
HJ_1927A Mb - Herschel, J.F.W. 1927sdsc.book......
HJ_1927A cited in SDS (Southern Double Star Catalog), 1927
HJ_1932A Mb - Herschel, J.F.W. 1932QB821.A43......
HJ_1932A cited in ADS (Aitken Double Star Cat.), 1932
HJ_9999 M j Herschel, J.F.W. ...................
HJ_9999 +Ma Unpublished, manuscript or reference not found.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19531-2126 HJ 2902 1999 6 31 16.1 10.30 10.33 F5V D 195307.60-212549.9
19531-2126 HJ 2902 2010 8 31 16.1 10.30 10.33 F5V 195307.60-212549.9
19531-2126 HJ 2902 2015 9 31 16.2 10.30 10.33 F5V 195307.60-212549.9
19531-2126 HJ 2902 2016 11 31 16.2 10.30 10.33 F5V V 195307.60-212549.9

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

 
 
WDS 19531-2126 HJ 2902 (HD 187908) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 19531-2126 HJ 2902 (HD 187908) : MEASURES
 
 
No records found.

 
 
WDS 19531-2126 (HD 187908) : VIRTUAL EYEPIECE
 
 

19531-2126 HJ 2902A mag 10.3 Sp F5V 19531-2126 HJ 2902B sep 15.9 P.A. 29.20 mag 10.33 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 19531-2126 (HD 187908) : ALADIN DSS IMAGE @ 19h 53m 07.60s -21° 25' 49.9"
 
 
 
 
WDS 19531-2126 HJ 2902 (HD 187908) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

19531-2126 HJ 2902 distance=1' 19535-2054 ARA1572 distance=33' 19536-2048 LDS4822 distance=39' 19559-2103 ARA1573 distance=45' 19563-2138 LDS 694 distance=46' 19562-2206 BRT1556 distance=59' 19488-2129 TDS1016 distance=62' 19512-2030 TDT1804 distance=62' 19575-2108 BRT1557 distance=64' 19537-2022 UC 4046 distance=65' 19578-2132 CRI 25AB distance=66' 19578-2132 SKF 442AC distance=66' 19501-2034 TDT1788 distance=68' 19512-2023 SHN 240 distance=68' 19552-2021 HLD 36 distance=72' 19579-2056 ARA1575 distance=73' 19567-2029 DON 973 distance=77' 19480-2057 HDS2815 distance=78' 19524-2246 OCC 188 distance=81' 19475-2150 STN 49 distance=82' 19480-2211 DON 968 distance=84' 19592-2155 LDS 697 distance=90' 19490-2236 DON 969 distance=92' 19465-2131 BU 467 distance=93' 19548-1949 GWP2907 distance=101' 19496-2254 UC 4031 distance=102' 19460-2142 LDS4817 distance=102' 19459-2113 ARA1571 distance=102' 19491-2000 RST5144 distance=103' 19528-2309 OCC 189 distance=104' 19587-2237 TDS1029 distance=106' 20007-2204 KPP1108 distance=113' 19454-2201 DON 966 distance=113' 19541-1930 ARA 793 distance=117' 19472-2003 BRT1555 distance=118' 19537-2327 UC 4047 distance=122' 19549-2325 ARA2268 distance=122' 19471-1953 BU 146 distance=126' 20023-2124 LDS4828 distance=128' 19446-2039 ARA1198 distance=130' 19440-2058 ARA1570 distance=131' 19462-1959 TDT1723 distance=131' 19448-2029 DON 965AB distance=132' 19448-2029 DON 965AC distance=132' 19448-2029 HJ 2890AD distance=132' 19448-2029 HJ 2890AE distance=132' 19506-1917 HJ 2900 distance=134' 19536-1912 DAM 183 distance=134' 19542-2339 ARA2267 distance=135' 19453-2245 B 2879 distance=135' 20020-2029 TDT1924 distance=138' 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 19531-2126 HJ 2902 31 16.2 1
Show 19535-2054 ARA1572 255 9.0 33
Show 19536-2048 LDS4822 267 45.3 39
Show 19559-2103 ARA1573 207 8.9 45
Show 19563-2138 LDS 694 212 10.2 46
Show 19562-2206 BRT1556 35 3.5 59
Show 19488-2129 TDS1016 270 0.8 62
Show 19512-2030 TDT1804 242 0.5 62
Show 19575-2108 BRT1557 190 2.8 64
Show 19537-2022 UC 4046 106 64.0 65
Show 19578-2132 CRI 25 AB 3 10.3 66
Show 19578-2132 SKF 442 AC 333 3.8 66
Show 19501-2034 TDT1788 228 0.6 68
Show 19512-2023 SHN 240 -1 0.3 68
Show 19552-2021 HLD 36 219 1.3 72
Show 19579-2056 ARA1575 344 10.5 73
Show 19567-2029 DON 973 348 4.3 77
Show 19480-2057 HDS2815 19 0.2 78
Show 19524-2246 OCC 188 -1 0.5 81
Show 19475-2150 STN 49 336 1.4 82
Show 19480-2211 DON 968 232 1.8 84
Show 19592-2155 LDS 697 315 41.7 90
Show 19490-2236 DON 969 12 1.9 92
Show 19465-2131 BU 467 137 3.7 93
Show 19548-1949 GWP2907 141 108.3 101
Show 19496-2254 UC 4031 286 25.5 102
Show 19460-2142 LDS4817 106 127.9 102
Show 19459-2113 ARA1571 332 15.4 102
Show 19491-2000 RST5144 124 2.9 103
Show 19528-2309 OCC 189 -1 0.1 104
Show 19587-2237 TDS1029 239 1.3 106
Show 20007-2204 KPP1108 355 8.8 113
Show 19454-2201 DON 966 288 3.2 113
Show 19541-1930 ARA 793 246 11.7 117
Show 19472-2003 BRT1555 247 3.9 118
Show 19537-2327 UC 4047 224 54.9 122
Show 19549-2325 ARA2268 2 2.6 122
Show 19471-1953 BU 146 78 0.5 126
Show 20023-2124 LDS4828 105 42.0 128
Show 19446-2039 ARA1198 72 14.7 130
Show 19440-2058 ARA1570 64 9.8 131
Show 19462-1959 TDT1723 14 0.6 131
Show 19448-2029 DON 965 AB 241 2.8 132
Show 19448-2029 DON 965 AC 208 4.8 132
Show 19448-2029 HJ 2890 AD 280 30.7 132
Show 19448-2029 HJ 2890 AE 348 30.0 132
Show 19506-1917 HJ 2900 63 19.4 134
Show 19536-1912 DAM 183 248 7.0 134
Show 19542-2339 ARA2267 197 12.0 135
Show 19453-2245 B 2879 150 13.0 135
Show 20020-2029 TDT1924 243 0.9 138

 
 
WDS 19531-2126 : COMPONENTS
 
 
  A
B pa=29.2°
sep=15.88"
 
 
19531-2126 A
 
 
Componente originario normalizzato AB Name HD 187909 Coord arcsec 2000 195307.60-212549.9 Mag 10.3
Spectral class F5V (yellow-white) PmRA 12.00 PmDE -40.0 Tycho2 6325-02156-1
HD 187909
Tycho2
Tycho2 6325-02156-1 Pflag RAmdeg 298.28168482 DEmdeg -21.43052579
PmRA 4.2 PmDE -43.9 E RAmdeg 26 E DEmdeg 30
E pmRA 2.7 E pmDE 2.9 EpRAm 1990.48 EpDEm 1990.04
Num 3 Q RAmdeg 0.7 Q DEmdeg 1.0 Q pmRA 0.7
Q pmDE 1.0 BTmag 10.856 E BTmag 0.047 VTmag 10.297
E VTmag 0.041 Prox 163 TYC T HIP
CCDM RAdeg 298.28167472 DEdeg -21.43042361 EpRA 1990 1.77
EpDE 1990 1.62 E RAdeg 26.4 E DEdeg 29.8 Posflg
Corr -0.2
CCDM
Ccdm 19531-2126 RComp Comp A Note1
Note2 Discov num DRAs 2.19 DDEs 25.0
R dRAs 40 Year Theta Rho
Obs 2 Vmag 10.1 Sp F5 PmNote
PmRA 21 PmDE -33 Dm number -21 5560 Cat1 BD
Name2 -21 7532 Cat2 CPD HD 187909 M HD
ADS BDS B 9671 M ADS BDS N IDS IDS 19472S2141A
HIC
 
 
19531-2126 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 195308.16-212536.0 Mag 10.33 PmRA 9.00
PmDE -41.0 SAO 188674 Tycho2 6325-02155-1 HD 187908
DM BD-21 5560 Calc delta mag 0.03 Calc coord yes
Tycho2
Tycho2 6325-02155-1 Pflag RAmdeg 298.28422252 DEmdeg -21.42665534
PmRA 12.6 PmDE -42.6 E RAmdeg 25 E DEmdeg 30
E pmRA 2.3 E pmDE 2.2 EpRAm 1989.11 EpDEm 1988.42
Num 6 Q RAmdeg 0.6 Q DEmdeg 1.0 Q pmRA 0.6
Q pmDE 1.0 BTmag 10.932 E BTmag 0.052 VTmag 10.326
E VTmag 0.043 Prox 163 TYC T HIP
CCDM RAdeg 298.28419444 DEdeg -21.42655722 EpRA 1990 1.75
EpDE 1990 1.63 E RAdeg 28.0 E DEdeg 31.5 Posflg
Corr -0.2
SAO
SAO 188674 DelFlag RA1950 PmRA1950 0.0009
DE1950 PmDE1950 -0.024 Vmag 9.4 SpType F5
Double code Source 23 CatNum 8522 DM BD-21 5560
DMcomp BDsup HD 187908 M HD 9
GC RA1950rad 5.19316348 DE1950rad -0.37622938 PmRA2000 0.0009
PmDE2000 -0.025
CCDM
Ccdm 19531-2126 RComp Comp B Note1
Note2 Discov num HJ 2902 DRAs 1.61 DDEs 10.9
R dRAs 40 Year 1919 Theta 212 Rho 16.3
Obs 1 Vmag 10.1 Sp F5 PmNote
PmRA PmDE Dm number Cat1
Name2 -21 7531 Cat2 CPD HD 187908 M HD
ADS BDS B 9671 M ADS BDS N IDS IDS 19472S2141B
HIC