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Doubles in session


Current system
20431+1705
BLL 51
S Del


Nearby doubles
8' : 20434+1712
J 845

12' : 20435+1657
STF2720

22' : 20417+1716
BPM2230

23' : 20433+1728
J 3109

23' : 20432+1728
LOS 9

28' : 20430+1734
BPM2236

30' : 20442+1731
BPM2241

33' : 20437+1635
BPM2237

33' : 20446+1642
BPM2246AB

35' : 20453+1715
GWP2993

35' : 20448+1730
BPM2252

38' : 20456+1714
COU 425

39' : 20446+1635
BPM2248AB

41' : 20416+1738
J 3107

42' : 20408+1733
BPM2226

45' : 20409+1738
J 191

45' : 20411+1631
FMR 161

48' : 20463+1715
GWP2995

50' : 20444+1752
UC 4276

55' : 20437+1800
LDS4857

60' : 20415+1611
J 2319

62' : 20400+1749
BPM2222

63' : 20463+1624
BPM2257

63' : 20434+1604
HJ 1564

65' : 20446+1605
BPM2245

72' : 20466+1616
BPM2261



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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20431+1705 BLL 51 (S Del)

 
 
20h 43m 03.51s +17° 06' 10.1" P.A. 159.00 sep 56.3 mag 8.72,9.56 Sp M5 dist. 2127.66 pc (6940.43 l.y.)
 
 
Coord 2000 20431+1705 Discov num BLL  51 Comp Coord arcsec 2000 20 43 03.51 +17 06 10.1
Date first 1879 Date last 2014 Obs 17
Pa first 162 Pa last 159.3 P.A. Now (θ) 159.3°
Sep first 55.8 Sep last 56.314 Sep. Now (ρ) 56.314"
Mag pri 8.72 Mag sec 9.56 delta mag (ΔM) 0.84 Spectral class M5 (red)
Pri motion ra -004 Sec motion ra +008
Pri motion dec +006 Sec motion dec +007
Notes N (See Notes)
rPM=1.133
This double is not physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name S Del Constellation Delphinus SAO 106422 HIP 102242
Tycho2 1638-00403-1 Gaia DR2 1811437302161430656 HD 197420 GC 28867
BD BD+16 4350 Distance 2127.66 Distance ly 6940.43
 
 
WDS 20431+1705 BLL 51 (S Del) : NOTES
 
 
discov_num notes refcode
BLL 51 A is the variable S Del. B is BD+16@4350.
 
 
REFERENCES
 
 
refcode metd author reference
Bll1872 orb - Ball, R.S. .
Bll1872 Proc. Royal Irish Acad., June 1872
Bll1884 Ma j Ball, R.S. 1884DunOP...5....1B
Bll1884 Pub. Dunsink Obs. 5, 1, 1884
Bll1913A Ma - Ball, R.S. 1913QB811.B8.......
Bll1913A cited by Burnham (Carnegie Inst. Wash. #168, 1913)
Bll1932A - Ball, R.S. 1932QB821.A43......
Bll1932A cited in ADS (Aitken Double Star Cat.), 1932
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20431+1705 BLL 51 2006 10 159 56.3 8.72 9.56 M5 N 204303.51+170610.1
20431+1705 BLL 51 2013 13 159 56.5 8.72 9.56 M5 N 204303.51+170610.1
20431+1705 BLL 51 2014 17 159 56.3 8.72 9.56 M5 N 204303.51+170610.1

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

 
 
WDS 20431+1705 BLL 51 (S Del) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20431+1705 BLL 51 (S Del) : MEASURES
 
 
No records found.

 
 
WDS 20431+1705 (S Del) : VIRTUAL EYEPIECE
 
 

20431+1705 BLL 51A mag 8.72 Sp M5 20431+1705 BLL 51B sep 56.0 P.A. 160.10 mag 9.56 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 20431+1705 (S Del) : ALADIN DSS IMAGE @ 20h 43m 03.51s +17° 06' 10.1"
 
 
 
 
WDS 20431+1705 BLL 51 (S Del) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20431+1705 BLL 51 distance=0' 20434+1712 J 845 distance=8' 20435+1657 STF2720 distance=12' 20417+1716 BPM2230 distance=22' 20433+1728 J 3109 distance=23' 20432+1728 LOS 9 distance=23' 20430+1734 BPM2236 distance=28' 20442+1731 BPM2241 distance=30' 20437+1635 BPM2237 distance=33' 20446+1642 BPM2246AB distance=33' 20446+1642 BPM2247AC distance=33' 20453+1715 GWP2993 distance=35' 20448+1730 BPM2252 distance=35' 20456+1714 COU 425 distance=38' 20446+1635 BPM2248AB distance=39' 20446+1635 BPM2249AC distance=39' 20446+1635 BPM2250BC distance=40' 20416+1738 J 3107 distance=41' 20408+1733 BPM2226 distance=42' 20409+1738 J 191 distance=45' 20411+1631 FMR 161 distance=45' 20463+1715 GWP2995 distance=48' 20444+1752 UC 4276 distance=50' 20437+1800 LDS4857 distance=55' 20415+1611 J 2319 distance=60' 20400+1749 BPM2222 distance=62' 20463+1624 BPM2257 distance=63' 20434+1604 HJ 1564 distance=63' 20446+1605 BPM2245 distance=65' 20466+1616 BPM2261 distance=72' 20479+1732 BRT1348 distance=75' 20406+1559 BPM2225 distance=76' 20420+1821 J 193 distance=77' 20467+1607 STF2727AB distance=79' 20467+1607 FYM 18AD distance=79' 20413+1551 UC 4257 distance=80' 20383+1623 BPM2216 distance=82' 20377+1736 BPM2215 distance=83' 20395+1812 BPM2220 distance=84' 20468+1602 BPM2264 distance=84' 20462+1554 WSI 110Aa,Ab distance=85' 20462+1554 STF2725AB distance=85' 20374+1735 BPM2211 distance=86' 20435+1540 GWP2990 distance=87' 20485+1628 BPM2271 distance=87' 20396+1555 WCK 2Aa,Ab (Sualocin) distance=87' 20396+1555 BU 298AB (Sualocin) distance=87' 20396+1555 HJ 1554AC (Sualocin) distance=87' 20396+1555 BU 298AD (Sualocin) distance=87' 20396+1555 BU 298AE (Sualocin) distance=87' 20396+1555 BU 298AF (Sualocin) distance=87' 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 20431+1705 BLL 51 159 56.3
Show 20434+1712 J 845 224 4.0 8
Show 20435+1657 STF2720 177 4.0 12
Show 20417+1716 BPM2230 15 58.6 22
Show 20433+1728 J 3109 245 7.8 23
Show 20432+1728 LOS 9 116 2.8 23
Show 20430+1734 BPM2236 331 95.7 28
Show 20442+1731 BPM2241 344 107.2 30
Show 20437+1635 BPM2237 49 108.4 33
Show 20446+1642 BPM2246 AB 16 90.0 33
Show 20446+1642 BPM2247 AC 173 116.0 33
Show 20453+1715 GWP2993 104 11.1 35
Show 20448+1730 BPM2252 246 39.8 35
Show 20456+1714 COU 425 327 0.7 38
Show 20446+1635 BPM2248 AB 95 107.8 39
Show 20446+1635 BPM2249 AC 29 107.0 39
Show 20446+1635 BPM2250 BC 332 117.2 40
Show 20416+1738 J 3107 119 6.0 41
Show 20408+1733 BPM2226 226 107.2 42
Show 20409+1738 J 191 166 1.3 45
Show 20411+1631 FMR 161 322 27.8 45
Show 20463+1715 GWP2995 257 8.3 48
Show 20444+1752 UC 4276 284 50.8 50
Show 20437+1800 LDS4857 128 52.4 55
Show 20415+1611 J 2319 192 7.5 60
Show 20400+1749 BPM2222 294 86.5 62
Show 20463+1624 BPM2257 337 107.8 63
Show 20434+1604 HJ 1564 41 11.4 63
Show 20446+1605 BPM2245 198 112.1 65
Show 20466+1616 BPM2261 202 69.5 72
Show 20479+1732 BRT1348 123 5.7 75
Show 20406+1559 BPM2225 57 22.7 76
Show 20420+1821 J 193 81 5.5 77
Show 20467+1607 STF2727 AB 266 8.8 79
Show 20467+1607 FYM 18 AD 323 109.4 79
Show 20413+1551 UC 4257 208 20.3 80
Show 20383+1623 BPM2216 177 102.9 82
Show 20377+1736 BPM2215 103 61.2 83
Show 20395+1812 BPM2220 281 105.7 84
Show 20468+1602 BPM2264 222 107.2 84
Show 20462+1554 WSI 110 Aa,Ab 343 0.0 85
Show 20462+1554 STF2725 AB 12 6.2 85
Show 20374+1735 BPM2211 234 109.1 86
Show 20435+1540 GWP2990 291 26.5 87
Show 20485+1628 BPM2271 127 97.8 87
Show Sualocin 20396+1555 WCK 2 Aa,Ab 289 0.1 87
Show Sualocin 20396+1555 BU 298 AB 233 35.5 87
Show Sualocin 20396+1555 HJ 1554 AC 277 48.4 87
Show Sualocin 20396+1555 BU 298 AD 160 45.4 87
Show Sualocin 20396+1555 BU 298 AE 304 57.2 87
Show Sualocin 20396+1555 BU 298 AF 118 72.2 87

 
 
WDS 20431+1705 : COMPONENTS
 
 
  A
B pa=160.1°
sep=56.01"
 
 
20431+1705 A
 
 
Componente originario normalizzato AB Var name S Del Coord arcsec 2000 204303.51+170610.1 Mag 8.72
Spectral class M5 (red) PmRA -4.00 PmDE 6.0 HIP 102242
Tycho2 1638-00403-1 BD BD+16 4350
Tycho2
Tycho2 1638-00403-1 Pflag RAmdeg 310.76462849 DEmdeg 17.10280089
PmRA -4.4 PmDE 5.8 E RAmdeg 11 E DEmdeg 13
E pmRA 1.2 E pmDE 1.1 EpRAm 1989.80 EpDEm 1989.03
Num 9 Q RAmdeg 1.0 Q DEmdeg 1.1 Q pmRA 0.9
Q pmDE 1.1 BTmag 10.716 E BTmag 0.050 VTmag 8.719
E VTmag 0.017 Prox 562 TYC T HIP 102242
CCDM RAdeg 310.76463944 DEdeg 17.10278639 EpRA 1990 1.64
EpDE 1990 1.39 E RAdeg 11.8 E DEdeg 14.4 Posflg
Corr 0.1
Hipparcos
Catalog H HIP 102242 Proxy RAhms 20 43 03.51
DEdms +17 06 10.0 Vmag 8.54 VarFlag 1 R Vmag H
RAdeg 310.765 DEdeg 17.1028 AstroRef Plx 0.78
CCDM 20431+1706 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD BD BD+16 4350
CD CP Dm number +16 4350 VIred 1.62
SpType K5 R SpType Coord arcsec 2000 204303.51+170610.0
Hipparcos 2
HIP 102242 Sn 5 So 0 Nc 1
RArad 5.4238660926 DErad 0.2984999241 Plx -0.47 PmRA -3.47
PmDE 4.37 E RArad 0.77 E DErad 0.62 E Plx 1
E pmRA 0.94 E pmDE 0.62 Hpmag 8.6533 E Hpmag 0.0021
SHp 0.021 VA 0 BV 1.611 E BV 0.218
VI 1.62
 
 
20431+1705 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 204304.84+170517.4 Mag 9.56 PmRA 8.00
PmDE 7.0 SAO 106422 HIP 102246 Tycho2 1638-00307-1
HD 197420 GC 28867 BD BD+16 4351 Calc delta mag 0.84
Calc coord yes
Tycho2
Tycho2 1638-00307-1 Pflag RAmdeg 310.77036400 DEmdeg 17.08816214
PmRA 9.2 PmDE 7.3 E RAmdeg 19 E DEmdeg 24
E pmRA 1.3 E pmDE 1.3 EpRAm 1989.12 EpDEm 1986.60
Num 6 Q RAmdeg 1.1 Q DEmdeg 1.4 Q pmRA 1.1
Q pmDE 1.3 BTmag 10.882 E BTmag 0.057 VTmag 9.563
E VTmag 0.029 Prox 562 TYC T HIP 102246
CCDM RAdeg 310.77034278 DEdeg 17.08814444 EpRA 1990 1.71
EpDE 1990 1.35 E RAdeg 20.0 E DEdeg 26.2 Posflg
Corr 0.1
SAO
SAO 106422 DelFlag RA1950 PmRA1950 0.0015
DE1950 PmDE1950 0.032 Vmag 8.4 SpType M5
Double code Source 70 CatNum 28867 DM BD+16 4351
DMcomp BDsup HD 197420 M HD 0
GC 28867 RA1950rad 5.41390887 DE1950rad 0.29509386 PmRA2000 0.0016
PmDE2000 0.03
Hipparcos
Catalog H HIP 102246 Proxy RAhms 20 43 04.88
DEdms +17 05 17.3 Vmag 9.18 VarFlag 3 R Vmag H
RAdeg 310.77 DEdeg 17.0881 AstroRef * Plx -0.5
CCDM 20431+1706 N CCDM I Nsys 2 Ncomp 1
MultFlag V Source Qual M HIP
Theta Rho HD 197420 BD BD+16 4351
CD CP Dm number +16 4351 VIred 4.27
SpType M5-M8e R SpType Coord arcsec 2000 204304.88+170517.3
Hipparcos 2
HIP 102246 Sn 5 So 5 Nc 1
RArad 5.4239654692 DErad 0.2982443362 Plx 1.21 PmRA 4.34
PmDE 3.78 E RArad 1.68 E DErad 1.57 E Plx 2.22
E pmRA 2.85 E pmDE 1.73 Hpmag 8.4959 E Hpmag 0.1114
SHp 0.89 VA 1 BV 1.5 E BV 0.51
VI 4.27