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Current system
20444-2339
HJ 2991 AB


Nearby doubles
12' : 20451-2346
I 666

25' : 20450-2315
UC 4279

28' : 20446-2311
OCC 91

29' : 20462-2352
HO 139

29' : 20449-2311
SEE 427

33' : 20425-2358
KPP4212

47' : 20478-2334
HDO 161AB

52' : 20473-2307
BRT1566

56' : 20437-2434
SHK 1

64' : 20417-2249
LDS4854

67' : 20440-2233
ARA1933

67' : 20469-2435
B 501

67' : 20401-2411
HJ 5212

70' : 20446-2230
TDT2512

82' : 20434-2218
HJ 2989

88' : 20380-2340
TDT2438

88' : 20498-2426
HTS 3AB

89' : 20390-2428
B 2889

97' : 20395-2230
WIS 340

101' : 20461-2516
EHR 17

103' : 20487-2216
UC 4296

103' : 20392-2453
DAM 667

103' : 20519-2344
RST3271

104' : 20381-2244
B 497

106' : 20435-2524
DBR 323

107' : 20383-2234
ARA1932



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.

20444-2339 HJ 2991 AB

 
 
20h 44m 23.39s -23° 38' 58.4" P.A. 9.00 sep 38.1 mag 9.64,10.34 Sp A5
 
 
Coord 2000 20444-2339 Discov num HJ 2991 Comp AB Coord arcsec 2000 20 44 23.39 -23 38 58.4
Date first 1830 Date last 2015 Obs 15
Pa first 32 Pa last 8.8 P.A. Now (θ) 8.8°
Sep first 30.0 Sep last 38.1 Sep. Now (ρ) 38.1"
Mag pri 9.64 Mag sec 10.34 delta mag (ΔM) 0.7 Spectral class A5 (white)
Pri motion ra +051 Sec motion ra +009
Pri motion dec -070 Sec motion dec -013
Notes L (Linear solution)
rPM=0.818
This double is not physical.
 
 
20444-2339 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 44 23 -23 38 58 HJ 2991 AB 2015 15 9 38.1 9.64 10.34 0.70 <===
Show 20 44 24 -23 38 22 HJ 2991 BC 2015 14 285 5.8 10.34 13.10 2.76
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Capricornus Tycho2 6921-00902-1 Gaia DR2 6806604457774517888
 
 
WDS 20444-2339 HJ 2991 AB : 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
20444-2339 HJ 2991 AB 2006 12 10 38.0 9.64 10.34 A5 LD 204423.39-233858.4
20444-2339 HJ 2991 AB 2015 14 9 38.1 9.64 10.34 A5 L 204423.39-233858.4

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

 
 
WDS 20444-2339 HJ 2991 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20444-2339 HJ 2991 AB : MEASURES
 
 
No records found.

 
 
WDS 20444-2339 : VIRTUAL EYEPIECE
 
 

20444-2339 HJ 2991A mag 9.64 Sp A5 20444-2339 HJ 2991B sep 37.0 P.A. 10.70 mag 10.34 20444-2339 HJ 2991C sep 37.9 P.A. 2.60 mag 13.1 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 20444-2339 : ALADIN DSS IMAGE @ 20h 44m 23.39s -23° 38' 58.4"
 
 
 
 
WDS 20444-2339 HJ 2991 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20444-2339 HJ 2991AB distance=0' 20444-2339 HJ 2991BC distance=1' 20451-2346 I 666 distance=12' 20450-2315 UC 4279 distance=25' 20446-2311 OCC 91 distance=28' 20462-2352 HO 139 distance=29' 20449-2311 SEE 427 distance=29' 20425-2358 KPP4212 distance=33' 20478-2334 HDO 161AB distance=47' 20478-2334 HDO 161AC distance=47' 20473-2307 BRT1566 distance=52' 20437-2434 SHK 1 distance=56' 20417-2249 LDS4854 distance=64' 20440-2233 ARA1933 distance=67' 20469-2435 B 501 distance=67' 20401-2411 HJ 5212 distance=67' 20446-2230 TDT2512 distance=70' 20434-2218 HJ 2989 distance=82' 20380-2340 TDT2438 distance=88' 20498-2426 HTS 3AB distance=88' 20498-2426 HTS 3AC distance=88' 20498-2426 HTS 3AD distance=88' 20498-2426 HTS 3AE distance=88' 20498-2426 HTS 3AF distance=88' 20498-2426 HTS 3AG distance=88' 20498-2426 HTS 3AH distance=88' 20498-2426 HTS 3AI distance=88' 20390-2428 B 2889 distance=89' 20395-2230 WIS 340 distance=97' 20461-2516 EHR 17 distance=101' 20487-2216 UC 4296 distance=103' 20392-2453 DAM 667 distance=103' 20519-2344 RST3271 distance=103' 20381-2244 B 497 distance=104' 20435-2524 DBR 323 distance=106' 20383-2234 ARA1932 distance=107' 20438-2525 UC 4271 distance=107' 20485-2205 DON 994 distance=111' 20455-2148 UC 4281 distance=112' 20378-2451 BRT3094 distance=115' 20526-2323 WHC 21 distance=115' 20462-2145 HDS2957 distance=117' 20530-2347 HJ 3003 distance=119' 20465-2141 B 500 distance=122' 20368-2239 KPP1705 distance=122' 20474-2145 OCC 56 distance=122' 20458-2139 OCC 55 distance=122' 20379-2507 KPP4208 distance=125' 20353-2358 BRT3092 distance=127' 20444-2548 RST2155 distance=130' 20462-2131 OCC9196 distance=131' 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 20444-2339 HJ 2991 AB 9 38.1
Show 20444-2339 HJ 2991 BC 285 5.8 1
Show 20451-2346 I 666 149 0.4 12
Show 20450-2315 UC 4279 346 8.8 25
Show 20446-2311 OCC 91 -1 0.1 28
Show 20462-2352 HO 139 214 5.2 29
Show 20449-2311 SEE 427 132 3.7 29
Show 20425-2358 KPP4212 351 2.7 33
Show 20478-2334 HDO 161 AB 19 29.8 47
Show 20478-2334 HDO 161 AC 244 38.8 47
Show 20473-2307 BRT1566 285 3.1 52
Show 20437-2434 SHK 1 219 1.5 56
Show 20417-2249 LDS4854 106 3.3 64
Show 20440-2233 ARA1933 335 9.7 67
Show 20469-2435 B 501 231 0.8 67
Show 20401-2411 HJ 5212 284 25.0 67
Show 20446-2230 TDT2512 57 2.1 70
Show 20434-2218 HJ 2989 153 29.5 82
Show 20380-2340 TDT2438 104 0.5 88
Show 20498-2426 HTS 3 AB 109 3.6 88
Show 20498-2426 HTS 3 AC 310 10.1 88
Show 20498-2426 HTS 3 AD 261 12.7 88
Show 20498-2426 HTS 3 AE 164 14.8 88
Show 20498-2426 HTS 3 AF 247 16.5 88
Show 20498-2426 HTS 3 AG 26 19.9 88
Show 20498-2426 HTS 3 AH 93 21.0 88
Show 20498-2426 HTS 3 AI 205 25.7 88
Show 20390-2428 B 2889 220 6.8 89
Show 20395-2230 WIS 340 327 104.3 97
Show 20461-2516 EHR 17 59 11.4 101
Show 20487-2216 UC 4296 251 33.2 103
Show 20392-2453 DAM 667 98 8.0 103
Show 20519-2344 RST3271 151 0.3 103
Show 20381-2244 B 497 275 0.6 104
Show 20435-2524 DBR 323 175 2.2 106
Show 20383-2234 ARA1932 215 12.6 107
Show 20438-2525 UC 4271 61 8.1 107
Show 20485-2205 DON 994 85 0.6 111
Show 20455-2148 UC 4281 280 7.8 112
Show 20378-2451 BRT3094 250 4.5 115
Show 20526-2323 WHC 21 19 31.5 115
Show 20462-2145 HDS2957 236 0.4 117
Show 20530-2347 HJ 3003 198 1.4 119
Show 20465-2141 B 500 124 1.5 122
Show 20368-2239 KPP1705 335 13.2 122
Show 20474-2145 OCC 56 -1 0.1 122
Show 20458-2139 OCC 55 -1 0.1 122
Show 20379-2507 KPP4208 17 16.5 125
Show 20353-2358 BRT3092 150 5.9 127
Show 20444-2548 RST2155 353 1.2 130
Show 20462-2131 OCC9196 -1 0.0 131

 
 
WDS 20444-2339 : COMPONENTS
 
 
  A B
B pa=10.7°
sep=37.04"
 
C pa=2.6°
sep=37.94"
pa=286.3°
sep=5.35"
 
 
20444-2339 A
 
 
Coord arcsec 2000 204423.39-233858.4 Mag 9.64 Spectral class A5 (white) PmRA 51.00
PmDE -70.0 Tycho2 6921-00902-1
Tycho2
Tycho2 6921-00902-1 Pflag RAmdeg 311.09747401 DEmdeg -23.64956336
PmRA 61.4 PmDE -71.9 E RAmdeg 21 E DEmdeg 21
E pmRA 1.9 E pmDE 1.6 EpRAm 1989.02 EpDEm 1984.91
Num 7 Q RAmdeg 0.5 Q DEmdeg 1.1 Q pmRA 0.5
Q pmDE 1.1 BTmag 10.832 E BTmag 0.054 VTmag 9.639
E VTmag 0.029 Prox 366 TYC T HIP
CCDM RAdeg 311.09731944 DEdeg -23.64939528 EpRA 1990 1.65
EpDE 1990 1.45 E RAdeg 21.6 E DEdeg 25.2 Posflg
Corr -0.2
CCDM
Ccdm 20444-2339 RComp Comp A Note1
Note2 Discov num DRAs -0.68 DDEs 2.3
R dRAs 66 Year Theta Rho
Obs 3 Vmag 9.3 Sp A5 PmNote
PmRA 47 PmDE -39 Dm number -2416238 Cat1 CD
Name2 -24 7060 Cat2 CPD HD M HD
ADS BDS A14213 M ADS BDS N IDS IDS 20385S2401A
HIC
 
 
20444-2339 B
 
 
Coord arcsec 2000 204423.89-233822.0 Coord calc 204423.89-233822.0 Mag 10.34 PmRA 9.00
PmDE -13.0 Tycho2 6921-00155-1 Calc delta mag 0.7
Tycho2
Tycho2 6921-00155-1 Pflag RAmdeg 311.09958654 DEmdeg -23.63944726
PmRA 2.7 PmDE -10.5 E RAmdeg 27 E DEmdeg 26
E pmRA 2.0 E pmDE 1.7 EpRAm 1987.65 EpDEm 1982.15
Num 5 Q RAmdeg 0.9 Q DEmdeg 2.0 Q pmRA 0.9
Q pmDE 1.9 BTmag 10.607 E BTmag 0.047 VTmag 10.343
E VTmag 0.050 Prox 366 TYC T HIP
CCDM RAdeg 311.09958139 DEdeg -23.63943333 EpRA 1990 1.64
EpDE 1990 1.46 E RAdeg 28.6 E DEdeg 33.1 Posflg
Corr -0.2
CCDM
Ccdm 20444-2339 RComp Comp B Note1
Note2 Discov num HJ 2991 DRAs -0.13 DDEs 37.8
R dRAs 66 Year 1959 Theta 016 Rho 35.0
Obs 4 Vmag 9.8 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 -24 7061 Cat2 CPD HD M HD
ADS BDS A14213 M ADS BDS N IDS IDS 20385S2401B
HIC
 
 
20444-2339 C
 
 
Coord arcsec 2000 204423.52-233820.5 Mag 13.1 PmRA -70.00 PmDE 9.0
Calc delta mag 3.46 Calc coord yes
CCDM
Ccdm 20444-2339 RComp B Comp C Note1
Note2 Discov num HJ 2991 DRAs DDEs
R dRAs Year 1959 Theta 019 Rho 1.5
Obs 9 Vmag 12.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14213 M ADS BDS N IDS IDS 20385S2401C
HIC