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Doubles in session


Current system
20474-1837
HJ 2995
HD 197930


Nearby doubles
30' : 20484-1812
S 763AB

37' : 20452-1857
ARA 803

42' : 20452-1809
GWP2992

45' : 20493-1802
HJ 3000

53' : 20509-1851
GWP3005

63' : 20435-1907
HU 270AB

66' : 20429-1857
KUI 100AB

67' : 20429-1856
WOR 41

73' : 20493-1945
ALP 25

73' : 20522-1904
I 667

74' : 20431-1919
AOT 94

74' : 20427-1807
OCC 603

76' : 20429-1757
ARA 499AB

77' : 20434-1929
HLD 40AB

89' : 20430-1942
ARA1214

92' : 20409-1831
AOT 93

95' : 20439-1958
BRT1565

96' : 20416-1928
RST3266

97' : 20408-1901
BAR 55

103' : 20468-1655
ARN 110

106' : 20464-1653
HU 271

106' : 20413-1736
HJ 2986

107' : 20399-1817
LDS4853

107' : 20512-2010
BHA 41

109' : 20398-1827
RST3265AB

111' : 20453-2024
HJ 2992



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.

20474-1837 HJ 2995 (HD 197930)

 
 
20h 47m 22.91s -18° 37' 16.3" P.A. 283.00 sep 29.0 mag 8.20,12.10 Sp F7/8V dist. 70.52 pc (230.04 l.y.)
 
 
Coord 2000 20474-1837 Discov num HJ 2995 Comp Coord arcsec 2000 20 47 22.91 -18 37 16.3
Date first 1830 Date last 2016 Obs 8
Pa first 284 Pa last 282.6 P.A. Now (θ) 282.6°
Sep first 20.0 Sep last 28.981 Sep. Now (ρ) 28.981"
Mag pri 8.20 Mag sec 12.10 delta mag (ΔM) 3.9 Spectral class F7/8V (yellow-white)
Pri motion ra -004 Sec motion ra -006
Pri motion dec -037 Sec motion dec -031
Notes
rPM=0.17 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 197930 Constellation Capricornus SAO 163877 HIP 102587
Tycho2 6335-00114-1 Gaia DR2 6858523083302471168 HD 197930 BD BD-19 5925
Distance 70.52 Distance ly 230.04
 
 
WDS 20474-1837 HJ 2995 (HD 197930) : 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
20474-1837 HJ 2995 1830 1 284 20.0 8.10 11.10 F7/8V 204722.92-183716.1
20474-1837 HJ 2995 2000 2 283 28.9 8.20 12.10 F7/8V 204722.91-183716.3
20474-1837 HJ 2995 2013 4 284 29.0 8.20 12.10 F7/8V 204722.91-183716.3
20474-1837 HJ 2995 2015 6 283 29.0 8.20 12.10 F7/8V 204722.91-183716.3
20474-1837 HJ 2995 2016 8 283 29.0 8.20 12.10 F7/8V 204722.91-183716.3

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

 
 
WDS 20474-1837 HJ 2995 (HD 197930) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20474-1837 HJ 2995 (HD 197930) : MEASURES
 
 
No records found.

 
 
WDS 20474-1837 (HD 197930) : VIRTUAL EYEPIECE
 
 

20474-1837 HJ 2995A mag 8.2 Sp F7/8V 20474-1837 HJ 2995B sep 27.5 P.A. 283.30 mag 12.1 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 20474-1837 (HD 197930) : ALADIN DSS IMAGE @ 20h 47m 22.91s -18° 37' 16.3"
 
 
 
 
WDS 20474-1837 HJ 2995 (HD 197930) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20474-1837 HJ 2995 distance=1' 20484-1812 S 763CD distance=23' 20484-1812 S 763AB distance=30' 20484-1812 S 763AC distance=30' 20484-1812 OCC9211EF distance=30' 20452-1857 ARA 803 distance=37' 20452-1809 GWP2992 distance=42' 20493-1802 HJ 3000 distance=45' 20509-1851 GWP3005 distance=53' 20435-1907 HU 270AB distance=63' 20435-1907 B 2890AC distance=63' 20435-1907 AOT 95AD distance=63' 20429-1857 KUI 100AB distance=66' 20429-1857 KUI 100AC distance=66' 20429-1857 KUI 100AD distance=66' 20429-1856 WOR 41 distance=67' 20493-1945 ALP 25 distance=73' 20522-1904 I 667 distance=73' 20431-1919 AOT 94 distance=74' 20427-1807 OCC 603 distance=74' 20429-1757 TDT2493Aa,Ab distance=76' 20429-1757 ARA 499AB distance=76' 20434-1929 HLD 40AB distance=77' 20434-1929 HLD 40AC distance=77' 20434-1929 HLD 40AD distance=77' 20434-1929 HLD 40CD distance=79' 20430-1942 ARA1214 distance=89' 20409-1831 AOT 93 distance=92' 20439-1958 BRT1565 distance=95' 20416-1928 RST3266 distance=96' 20408-1901 BAR 55 distance=97' 20468-1655 ARN 110 distance=103' 20464-1653 HU 271 distance=106' 20413-1736 HJ 2986 distance=106' 20399-1817 LDS4853 distance=107' 20512-2010 BHA 41 distance=107' 20398-1827 RST3265AB distance=109' 20398-1827 HJ 2983AB,C distance=109' 20453-2024 HJ 2992 distance=111' 20433-1701 RST3267 distance=113' 20394-1848 AOT 90 distance=115' 20399-1918 AOT 91 distance=115' 20533-1719 HLD 42 distance=116' 20460-2031 OCC9195 distance=116' 20393-1827 LEO 48 distance=116' 20465-1642 SKI 11 distance=117' 20392-1850 LDS6415 distance=117' 20410-1723 BU 1209 distance=118' 20397-1749 FEN 39 distance=121' 20400-1940 AOT 92 distance=122' 20489-2037 HJ 2998AB 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 20474-1837 HJ 2995 283 29.0 1
Show 20484-1812 S 763 CD 333 9.1 23
Show 20484-1812 S 763 AB 293 15.8 30
Show 20484-1812 S 763 AC 177 542.3 30
Show 20484-1812 OCC9211 EF 46 0.6 30
Show 20452-1857 ARA 803 123 12.1 37
Show 20452-1809 GWP2992 114 100.8 42
Show 20493-1802 HJ 3000 251 33.4 45
Show 20509-1851 GWP3005 351 7.4 53
Show 20435-1907 HU 270 AB 85 1.8 63
Show 20435-1907 B 2890 AC 32 4.8 63
Show 20435-1907 AOT 95 AD 127 38.7 63
Show 20429-1857 KUI 100 AB 323 81.4 66
Show 20429-1857 KUI 100 AC 318 74.6 66
Show 20429-1857 KUI 100 AD 305 70.3 66
Show 20429-1856 WOR 41 261 3.1 67
Show 20493-1945 ALP 25 163 21.1 73
Show 20522-1904 I 667 342 2.7 73
Show 20431-1919 AOT 94 140 10.9 74
Show 20427-1807 OCC 603 -1 0.5 74
Show 20429-1757 TDT2493 Aa,Ab 261 0.7 76
Show 20429-1757 ARA 499 AB 172 14.1 76
Show 20434-1929 HLD 40 AB 356 5.2 77
Show 20434-1929 HLD 40 AC 258 144.2 77
Show 20434-1929 HLD 40 AD 255 145.6 77
Show 20434-1929 HLD 40 CD 188 4.5 79
Show 20430-1942 ARA1214 38 3.7 89
Show 20409-1831 AOT 93 146 19.8 92
Show 20439-1958 BRT1565 221 4.1 95
Show 20416-1928 RST3266 261 2.4 96
Show 20408-1901 BAR 55 273 4.1 97
Show 20468-1655 ARN 110 90 59.4 103
Show 20464-1653 HU 271 100 0.3 106
Show 20413-1736 HJ 2986 185 18.3 106
Show 20399-1817 LDS4853 39 207.9 107
Show 20512-2010 BHA 41 64 4.5 107
Show 20398-1827 RST3265 AB 31 0.2 109
Show 20398-1827 HJ 2983 AB,C 174 15.5 109
Show 20453-2024 HJ 2992 144 2.9 111
Show 20433-1701 RST3267 217 1.4 113
Show 20394-1848 AOT 90 106 19.3 115
Show 20399-1918 AOT 91 192 17.9 115
Show 20533-1719 HLD 42 44 1.3 116
Show 20460-2031 OCC9195 -1 0.0 116
Show 20393-1827 LEO 48 199 2.3 116
Show 20465-1642 SKI 11 289 3.9 117
Show 20392-1850 LDS6415 350 1.5 117
Show 20410-1723 BU 1209 297 0.4 118
Show 20397-1749 FEN 39 115 3.7 121
Show 20400-1940 AOT 92 277 17.5 122
Show 20489-2037 HJ 2998 AB 140 6.0 122

 
 
WDS 20474-1837 : COMPONENTS
 
 
  A
B pa=283.3°
sep=27.54"
 
 
20474-1837 A
 
 
Componente originario normalizzato AB Name HD 197930 Coord arcsec 2000 204722.91-183716.3 Mag 8.2
Spectral class F7/8V (yellow-white) PmRA -4.00 PmDE -37.0 SAO 163877
HIP 102587 Tycho2 6335-00114-1 HD 197930 BD BD-19 5925
Tycho2
Tycho2 6335-00114-1 Pflag RAmdeg 311.84547791 DEmdeg -18.62121887
PmRA -3.6 PmDE -35.1 E RAmdeg 5 E DEmdeg 7
E pmRA 1.1 E pmDE 1.1 EpRAm 1991.19 EpDEm 1990.33
Num 14 Q RAmdeg 1.0 Q DEmdeg 1.1 Q pmRA 1.1
Q pmDE 1.2 BTmag 8.807 E BTmag 0.017 VTmag 8.200
E VTmag 0.012 Prox 999 TYC T HIP 102587
CCDM RAdeg 311.84548611 DEdeg -18.62113361 EpRA 1990 1.76
EpDE 1990 1.29 E RAdeg 5.1 E DEdeg 6.7 Posflg
Corr -0.1
SAO
SAO 163877 DelFlag RA1950 PmRA1950 -0.0016
DE1950 PmDE1950 -0.026 Vmag 8.6 SpType G0
Double code Source 22 CatNum 8919 DM BD-19 5925
DMcomp BDsup HD 197930 M HD 0
GC RA1950rad 5.43031365 DE1950rad -0.32821092 PmRA2000 -0.0015
PmDE2000 -0.028
Hipparcos
Catalog H HIP 102587 Proxy RAhms 20 47 22.92
DEdms -18 37 16.1 Vmag 8.14 VarFlag R Vmag G
RAdeg 311.845 DEdeg -18.6211 AstroRef Plx 13.96
CCDM 20474-1837 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 197930 BD BD-19 5925
CD CP Dm number -19 5925 VIred 0.64
SpType F7/F8V R SpType Coord arcsec 2000 204722.92-183716.1
Hipparcos 2
HIP 102587 Sn 5 So 0 Nc 1
RArad 5.4427305868 DErad -0.3250001188 Plx 14.18 PmRA -7.03
PmDE -36.83 E RArad 0.68 E DErad 0.47 E Plx 0.78
E pmRA 0.9 E pmDE 0.86 Hpmag 8.2629 E Hpmag 0.0011
SHp 0.012 VA 0 BV 0.568 E BV 0.015
VI 0.64
CCDM
Ccdm 20474-1837 RComp Comp A Note1
Note2 Discov num DRAs -1.17 DDEs -15.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 8.1 Sp G0 PmNote *
PmRA -23 PmDE -26 Dm number -19 5925 Cat1 BD
Name2 163877 Cat2 SAO HD 197930 M HD
ADS BDS B10503 M ADS BDS N IDS IDS 20417S1859A
HIC 102587
 
 
20474-1837 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204721.02-183710.0 Mag 12.1 PmRA -6.00
PmDE -31.0 Calc delta mag 3.9 Calc coord yes
CCDM
Ccdm 20474-1837 RComp Comp B Note1
Note2 Discov num HJ 2995 DRAs DDEs
R dRAs Year 1830 Theta 284 Rho 20.0
Obs 1 Vmag 11.1 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS B10503 M ADS BDS N IDS IDS 20417S1859B
HIC