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Doubles in session


Current system
18472+1655
ARN 75
HD 173921


Nearby doubles
3' : 18476+1655
J 2678

11' : 18481+1656
BPM 834

13' : 18466+1659
STF2385AB

17' : 18463+1659
HEI 260

18' : 18461+1655
HEI 259

21' : 18464+1641
HEI 261

32' : 18478+1725
BPM 832

39' : 18498+1639
BPM 853

43' : 18497+1629
BRT1311

46' : 18489+1615
STF2400AB

47' : 18496+1621
BPM 849

52' : 18503+1626
BPM 859

55' : 18500+1733
BPM 855

57' : 18456+1604
BPM 820

59' : 18481+1557
BPM 835

60' : 18449+1606
HEI 173

60' : 18515+1700
BPMA 65

63' : 18504+1739
KPP 859

67' : 18502+1603
RAO 399

68' : 18520+1705
COU 720

72' : 18487+1803
BPM 840

72' : 18473+1806
DAM 352

72' : 18521+1635
BPM 871

74' : 18423+1701
GWP2794

74' : 18439+1601
OSO 103AB

74' : 18484+1542
BPMA 61



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.

18472+1655 ARN 75 (HD 173921)

 
 
18h 47m 19.94s +16° 54' 30.6" P.A. 26.00 sep 65.3 mag 6.81,8.59 Sp B8 dist. 315.46 pc (1029.03 l.y.)
 
 
Coord 2000 18472+1655 Discov num ARN  75 Comp Coord arcsec 2000 18 47 19.94 +16 54 30.6
Date first 1899 Date last 2010 Obs 10
Pa first 27 Pa last 26 P.A. Now (θ) 26°
Sep first 60.9 Sep last 65.3 Sep. Now (ρ) 65.3"
Mag pri 6.81 Mag sec 8.59 delta mag (ΔM) 1.78 Spectral class B8 (blue-white)
Pri motion ra -002 Sec motion ra -002
Pri motion dec -008 Sec motion dec -007
Notes U (Proper motion indicates non-physical)
rPM=0.121 (< 0.3, Physical double)
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 173921 Constellation Hercules SAO 104098 HIP 92191
Tycho2 1587-00276-1 Gaia DR2 4511281094790764800 HD 173921 GC 25743
BD BD+16 3613 Distance 315.46 Distance ly 1029.03
 
 
WDS 18472+1655 ARN 75 (HD 173921) : NOTES
 
 
No records found.

 
 
REFERENCES
 
 
refcode metd author reference
Arn2001 Mg j Arnold, D. 2001DSO.....7....4A
Arn2001 Double Star Observer 7, #4, 2001
Arn2002a Mg j Arnold, D. 2002DSO.....8....1A
Arn2002a Double Star Observer 8, #1, 2002
Arn2002b Mg - Arnold, D. 2002DSO.....8....3A
Arn2002b Double Star Observer 8, #3, 2002
Arn2002c Mg j Arnold, D. 2002DSO.....8....4A
Arn2002c Double Star Observer 8, #4, 2002
Arn2002d Mg j Arnold, D. 2002DSO.....8....5A
Arn2002d Double Star Observer 8, #5, 2002
Arn2003a Mg j Arnold, D. 2003DSO.....9....1A
Arn2003a Double Star Observer 9, #1, 2003
Arn2003b Mg j Arnold, D. 2003DSO.....9....3A
Arn2003b Double Star Observer 9, #3, 2003
Arn2003c Mg j Arnold, D. 2003DSO.....9....4A
Arn2003c Double Star Observer 9, #4, 2003
Arn2003d Mg j Arnold, D. 2003DSO.....9....5A
Arn2003d Double Star Observer 9, #5, 2003
Arn2003e Mg j Arnold, D. 2003DSO.....9....6A
Arn2003e Double Star Observer 9, #6, 2003
Arn2004a Mg j Arnold, D. 2004DSO....10....1A
Arn2004a Double Star Observer 10, #1, 2004
Arn2004b Mg j Arnold, D. 2004DSO....10....2A
Arn2004b Double Star Observer 10, #2, 2004
Arn2004c Mg j Arnold, D. 2004DSO....10....3A
Arn2004c Double Star Observer 10, #3, 2004
Arn2004d Mg j Arnold, D. 2004DSO....10....4A
Arn2004d Double Star Observer 10, #4, 2004
Arn2004e Mg j Arnold, D. 2004DSO....10....5A
Arn2004e Double Star Observer 10, #5, 2004
Arn2004f Mg j Arnold, D. 2004DSO....10....6A
Arn2004f Double Star Observer 10, #6, 2004
Arn2005a Mg j Arnold, D. 2005DSO....11....1A
Arn2005a Double Star Observer 11, #1, 2005
Arn2005b Mg j Arnold, D. 2005DSO....11....2A
Arn2005b Double Star Observer 11, #2, 2005
Arn2005c Mg j Arnold, D. 2005DSO....11....3A
Arn2005c Double Star Observer 11, #3, 2005
Arn2005d Mg j Arnold, D. 2005DSO....11....4A
Arn2005d Double Star Observer 11, #4, 2005
Arn2005e Mg j Arnold, D. 2005DSO....11....5A
Arn2005e Double Star Observer 11, #5, 2005
Arn2005f Mg j Arnold, D. 2005DSO....11....6A
Arn2005f Double Star Observer 11, #6, 2005
Arn2006a Mg j Arnold, D. 2006JDSO....2....6A
Arn2006a +C JDSO 2, 6, 2006
Arn2006b Mg j Arnold, D. 2006JDSO....2...13A
Arn2006b JDSO 2, 13, 2006
Arn2006c Mg j Arnold, D. 2006JDSO....2...54A
Arn2006c JDSO 2, 54, 2006
Arn2006d Mg j Arnold, D. 2006JDSO....2...61A
Arn2006d JDSO 2, 61, 2006
Arn2006e Mg j Arnold, D. 2006JDSO....2...79A
Arn2006e JDSO 2, 79, 2006
Arn2006f Mg j Arnold, D. 2006JDSO....2...87A
Arn2006f JDSO 2, 87, 2006
Arn2006g Mg j Arnold, D. 2006JDSO....2..163A
Arn2006g +C JDSO 2, 163, 2006
Arn2007a Mg j Arnold, D. 2007JDSO....3...27A
Arn2007a JDSO 3, 27, 2007
Arn2007b Mg j Arnold, D. 2007JDSO....3...55A
Arn2007b JDSO 3, 55, 2007
Arn2007c Mg j Arnold, D. 2007JDSO....3..119A
Arn2007c JDSO 3, 119, 2007
Arn2007d Mg j Arnold, D. 2007JDSO....3..139A
Arn2007d JDSO 3, 139, 2007
Arn2008a Mg j Arnold, D. 2008JDSO....4....2A
Arn2008a JDSO 4, 2, 2008
Arn2008b Mg j Arnold, D. 2008JDSO....4...66A
Arn2008b JDSO 4, 66, 2008
Arn2008c Mg j Arnold, D. 2008JDSO....4...91A
Arn2008c JDSO 4, 91, 2008
Arn2008d Mg j Arnold, D. 2008JDSO....4..136A
Arn2008d JDSO 4, 136, 2008
Arn2009a Mg j Arnold, D. 2009JDSO....5....2A
Arn2009a JDSO 5, 2, 2009
Arn2009b Mg j Arnold, D. 2009JDSO....5...94A
Arn2009b JDSO 5, 94, 2009
Arn2009c Mg j Arnold, D. 2009JDSO....5..129A
Arn2009c JDSO 5, 129, 2009
Arn2009d Mg j Arnold, D. 2009JDSO....5..182A
Arn2009d JDSO 5, 182, 2009
Arn2010a Mg j Arnold, D. 2010JDSO....6....5A
Arn2010a JDSO 6, 5, 2010
Arn2010b Mg j Arnold, D. 2010JDSO....6..141A
Arn2010b JDSO 6, 141, 2010
Arn2010c Mg j Arnold, D. 2010JDSO....6..170A
Arn2010c JDSO 6, 170, 2010
Arn2010d Mg j Arnold, D. 2010JDSO....6..301A
Arn2010d JDSO 6, 301, 2010
Arn2012a Mg j Arnold, D. 2012JDSO....8...32A
Arn2012a JDSO 8, 32, 2012
Arn2012b Mg - Arnold, D. 2012JDSO....8..176A
Arn2012b JDSO 8, 176, 2012
Arn2012c Mg j Arnold, D. 2012JDSO....8..226A
Arn2012c JDSO 8, 226, 2012
Arn2013a Mg j Arnold, D. 2013JDSO....9...10A
Arn2013a JDSO 9, 10, 2013
Arn2013b M j Arnold, D. 2013JDSO....9..100A
Arn2013b JDSO 9, 100, 2013
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18472+1655 ARN 75 2004 1 27 60.2 6.80 8.60
18472+1655 ARN 75 2010 9 26 65.3 6.81 8.59 UD 184719.94+165430.6

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

 
 
WDS 18472+1655 ARN 75 (HD 173921) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18472+1655 ARN 75 (HD 173921) : MEASURES
 
 
Records found: 1
Show date username difficulty sep sep_sigma pa pa_sigma delta_mag # notes
Show 12/07/25 Robert   62.00 0.00 25.00 0.00   2
 
 
WDS 18472+1655 (HD 173921) : VIRTUAL EYEPIECE
 
 

18472+1655 ARN 75A mag 6.81 Sp B8 18472+1655 ARN 75B sep 64.8 P.A. 25.00 mag 8.59 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 18472+1655 (HD 173921) : ALADIN DSS IMAGE @ 18h 47m 19.94s +16° 54' 30.6"
 
 
 
 
WDS 18472+1655 ARN 75 (HD 173921) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18472+1655 ARN 75 distance=0' 18476+1655 J 2678 distance=3' 18481+1656 BPM 834 distance=11' 18466+1659 STF2385AB distance=13' 18466+1659 MAD 10AC distance=13' 18463+1659 HEI 260 distance=17' 18461+1655 HEI 259 distance=18' 18464+1641 HEI 261 distance=21' 18478+1725 BPM 832 distance=32' 18498+1639 BPM 853 distance=39' 18497+1629 BRT1311 distance=43' 18489+1615 STF2400AB distance=46' 18489+1615 STF2400AD distance=46' 18489+1615 STF2400AC distance=46' 18489+1615 STF2400A,BC distance=46' 18489+1615 STF2400BC distance=46' 18496+1621 BPM 849 distance=47' 18503+1626 BPM 859 distance=52' 18500+1733 BPM 855 distance=55' 18456+1604 BPM 820 distance=57' 18481+1557 BPM 835 distance=59' 18449+1606 HEI 173 distance=60' 18515+1700 BPMA 65 distance=60' 18504+1739 KPP 859 distance=63' 18502+1603 RAO 399 distance=67' 18520+1705 COU 720 distance=68' 18487+1803 BPM 840 distance=72' 18473+1806 DAM 352 distance=72' 18521+1635 BPM 871 distance=72' 18423+1701 GWP2794 distance=74' 18439+1601 OSO 103AB distance=74' 18439+1601 OSO 103AC distance=74' 18439+1601 OSO 103AD distance=74' 18439+1601 OSO 103AE distance=74' 18439+1601 OSO 103AF distance=74' 18484+1542 BPMA 61 distance=74' 18470+1541 GII 5 distance=74' 18504+1554 BPM 860 distance=75' 18525+1644 BPM 875 distance=76' 18477+1539 BPM 831 distance=76' 18470+1811 ENG 64BC distance=76' 18470+1811 ABH 103BE distance=76' 18470+1811 ABH 103BF distance=76' 18470+1811 ABH 103BG distance=76' 18470+1811 ABH 103BH distance=76' 18470+1811 ABH 103BI distance=76' 18470+1811 SMA 80CD distance=76' 18470+1811 ENG 64DJ distance=77' 18470+1811 ENG 64AB distance=77' 18470+1811 ENG 64AD distance=77' 18470+1811 ENG 64AC distance=77' 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 18472+1655 ARN 75 26 65.3
Show 18476+1655 J 2678 27 5.4 3
Show 18481+1656 BPM 834 51 119.5 11
Show 18466+1659 STF2385 AB 30 5.5 13
Show 18466+1659 MAD 10 AC 26 71.9 13
Show 18463+1659 HEI 260 301 2.2 17
Show 18461+1655 HEI 259 248 1.9 18
Show 18464+1641 HEI 261 102 2.4 21
Show 18478+1725 BPM 832 244 111.2 32
Show 18498+1639 BPM 853 163 102.8 39
Show 18497+1629 BRT1311 204 4.3 43
Show 18489+1615 STF2400 AB 159 9.7 46
Show 18489+1615 STF2400 AD 157 0.4 46
Show 18489+1615 STF2400 AC 161 10.9 46
Show 18489+1615 STF2400 A,BC 160 11.0 46
Show 18489+1615 STF2400 BC 201 1.0 46
Show 18496+1621 BPM 849 245 101.4 47
Show 18503+1626 BPM 859 264 110.0 52
Show 18500+1733 BPM 855 290 63.8 55
Show 18456+1604 BPM 820 18 61.6 57
Show 18481+1557 BPM 835 272 105.6 59
Show 18449+1606 HEI 173 305 3.7 60
Show 18515+1700 BPMA 65 297 191.5 60
Show 18504+1739 KPP 859 12 7.3 63
Show 18502+1603 RAO 399 140 2.8 67
Show 18520+1705 COU 720 194 4.5 68
Show 18487+1803 BPM 840 103 103.0 72
Show 18473+1806 DAM 352 202 11.4 72
Show 18521+1635 BPM 871 188 76.6 72
Show 18423+1701 GWP2794 68 14.0 74
Show 18439+1601 OSO 103 AB 121 5.0 74
Show 18439+1601 OSO 103 AC 44 8.9 74
Show 18439+1601 OSO 103 AD 25 14.1 74
Show 18439+1601 OSO 103 AE 150 16.4 74
Show 18439+1601 OSO 103 AF 233 17.4 74
Show 18484+1542 BPMA 61 54 281.7 74
Show 18470+1541 GII 5 102 8.3 74
Show 18504+1554 BPM 860 174 80.3 75
Show 18525+1644 BPM 875 352 114.0 76
Show 18477+1539 BPM 831 340 117.9 76
Show 18470+1811 ENG 64 BC 296 33.8 76
Show 18470+1811 ABH 103 BE 288 85.9 76
Show 18470+1811 ABH 103 BF 263 112.5 76
Show 18470+1811 ABH 103 BG 136 63.8 76
Show 18470+1811 ABH 103 BH 325 92.9 76
Show 18470+1811 ABH 103 BI 246 139.9 76
Show 18470+1811 SMA 80 CD 313 18.4 76
Show 18470+1811 ENG 64 DJ 253 132.4 77
Show 18470+1811 ENG 64 AB 241 113.7 77
Show 18470+1811 ENG 64 AD 258 143.8 77
Show 18470+1811 ENG 64 AC 252 135.8 77

 
 
WDS 18472+1655 : COMPONENTS
 
 
  A
B pa=25.0°
sep=64.77"
 
 
18472+1655 A
 
 
Componente originario normalizzato AB Name HD 173921 Coord arcsec 2000 184719.94+165430.6 Mag 6.81
Spectral class B8 (blue-white) PmRA -2.00 PmDE -8.0 SAO 104098
HIP 92191 Tycho2 1587-00276-1 HD 173921 GC 25743
BD BD+16 3613
Tycho2
Tycho2 1587-00276-1 Pflag RAmdeg 281.83308916 DEmdeg 16.90851430
PmRA -2.6 PmDE -7.7 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.2 EpRAm 1991.66 EpDEm 1991.65
Num 14 Q RAmdeg 0.8 Q DEmdeg 1.0 Q pmRA 0.7
Q pmDE 0.9 BTmag 6.922 E BTmag 0.015 VTmag 6.808
E VTmag 0.010 Prox 607 TYC T HIP 92191
CCDM RAdeg 281.83309556 DEdeg 16.90853167 EpRA 1990 1.90
EpDE 1990 1.85 E RAdeg 3.6 E DEdeg 3.9 Posflg
Corr 0.4
SAO
SAO 104098 DelFlag RA1950 PmRA1950 0.0015
DE1950 PmDE1950 -0.004 Vmag 6.7 SpType B8
Double code Source 70 CatNum 25743 DM BD+16 3613
DMcomp BDsup HD 173921 M HD 0
GC 25743 RA1950rad 4.90918462 DE1950rad 0.2941387 PmRA2000 0.0016
PmDE2000 -0.004
Hipparcos
Catalog H HIP 92191 Proxy RAhms 18 47 19.94
DEdms +16 54 30.7 Vmag 6.8 VarFlag R Vmag H
RAdeg 281.833 DEdeg 16.9085 AstroRef Plx 2.54
CCDM N CCDM Nsys Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 173921 BD BD+16 3613
CD CP Dm number +16 3613 VIred 0.11
SpType B8 R SpType Coord arcsec 2000 184719.94+165430.7
Hipparcos 2
HIP 92191 Sn 5 So 0 Nc 1
RArad 4.9189154507 DErad 0.2951096094 Plx 3.17 PmRA -2.28
PmDE -7.96 E RArad 0.46 E DErad 0.41 E Plx 0.6
E pmRA 0.51 E pmDE 0.5 Hpmag 6.8447 E Hpmag 0.0011
SHp 0.009 VA 0 BV 0.121 E BV 0.006
VI 0.14
 
 
18472+1655 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 184721.85+165529.3 Mag 8.59 PmRA -2.00
PmDE -7.0 SAO 104099 Tycho2 1587-00468-1 HD 229504
DM BD+16 3614 Calc delta mag 1.78 Calc coord yes
Tycho2
Tycho2 1587-00468-1 Pflag RAmdeg 281.84082540 DEmdeg 16.92367157
PmRA -1.7 PmDE -6.0 E RAmdeg 5 E DEmdeg 7
E pmRA 1.3 E pmDE 1.2 EpRAm 1991.63 EpDEm 1991.31
Num 8 Q RAmdeg 0.8 Q DEmdeg 1.1 Q pmRA 0.8
Q pmDE 1.2 BTmag 8.709 E BTmag 0.017 VTmag 8.587
E VTmag 0.013 Prox 607 TYC T HIP
CCDM RAdeg 281.84082944 DEdeg 16.92368528 EpRA 1990 1.93
EpDE 1990 1.92 E RAdeg 5.4 E DEdeg 7.4 Posflg
Corr 0.5
SAO
SAO 104099 DelFlag RA1950 PmRA1950 -0.0006
DE1950 PmDE1950 -0.011 Vmag 8.2 SpType A0
Double code Source 28 CatNum 7012 DM BD+16 3614
DMcomp BDsup HD 229504 M HD 0
GC RA1950rad 4.9093115 DE1950rad 0.29439972 PmRA2000 -0.0005
PmDE2000 -0.011