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Doubles in session


Current system
20396+1555
BU 298 AF


Nearby doubles
10' : 20391+1550
BU 288AB

16' : 20406+1559
BPM2225

22' : 20406+1539
HDS2947

24' : 20393+1529
HEI 77

25' : 20413+1551
UC 4257

30' : 20415+1611
J 2319

30' : 20391+1526
BPM2219

32' : 20375+1557
BPM2214

34' : 20383+1623
BPM2216

43' : 20411+1631
FMR 161

44' : 20366+1553
BPM2207

45' : 20374+1626
BPM2212

52' : 20402+1503
UC 4251

56' : 20388+1500
BU 435

57' : 20434+1604
HJ 1564

58' : 20435+1540
GWP2990

61' : 20436+1537
J 3108

63' : 20413+1458
NSN 4

65' : 20363+1636
J 3095

66' : 20357+1522
ARY 85

68' : 20391+1448
LEP 95

69' : 20351+1533
J 566

69' : 20434+1512
UC 4270

71' : 20437+1635
BPM2237

72' : 20446+1605
BPM2245

74' : 20364+1651
BPM2205



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.

20396+1555 BU 298 AF

 
 
20h 39m 38.25s +15° 54' 43.4" P.A. 118.00 sep 72.2 mag 3.86,10.70 Sp B9IV dist. 77.82 pc (253.85 l.y.)
 
 
Coord 2000 20396+1555 Discov num BU  298 Comp AF Coord arcsec 2000 20 39 38.25 +15 54 43.4
Date first 1835 Date last 2015 Obs 12
Pa first 118 Pa last 117.6 P.A. Now (θ) 117.6°
Sep first 105.0 Sep last 72.217 Sep. Now (ρ) 72.217"
Mag pri 3.86 Mag sec 10.70 delta mag (ΔM) 6.84 Spectral class B9IV (blue-white)
Pri motion ra +053 Sec motion ra -004
Pri motion dec +010 Sec motion dec -008
Notes N (See Notes)
rPM=1.108
This double is not physical.
 
 
20396+1555 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 106357 20 39 38 +15 54 43 WCK 2 Aa,Ab 2019 92 289 0.1 3.86 6.43 2.57 Y
Show 106357 20 39 38 +15 54 43 CIA 23 Ab1,2 2019 11 250 0.0 3.86 6.43 2.57
Show 106357 20 39 38 +15 54 43 BU 298 AB 2015 11 233 35.5 3.86 13.40 9.54
Show Sualocin 106357 20 39 38 +15 54 43 HJ 1554 AC 2017 15 277 48.4 3.86 11.90 8.04
Show 106357 20 39 38 +15 54 43 BU 298 AD 2015 13 160 45.4 3.86 12.90 9.04
Show 106357 20 39 38 +15 54 43 BU 298 AE 2015 12 304 57.2 3.86 12.60 8.74
Show 106357 20 39 38 +15 54 43 BU 298 AF 2015 12 118 72.2 3.86 10.70 6.84 <===
Octuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Sualocin Var name NSV13207 Del Constellation Delphinus SAO 106357
HIP 101958 Tycho2 1633-02442-1 Gaia DR2 1810711143450256128 HD 196867
HR 7906 GC 28780 ADS 14121 BD BD+15 4222
Bayer Alpha Delphini Bayer name Alp Del Flamsteed 9 Delphini Flamsteed name 9 Del
FK5 774 Distance 77.82 Distance ly 253.85 Bayer greek α Del
Other names SVALOCIN, Scalovin
Meaning 'Nicolaus' in reverse
 
 
WDS 20396+1555 BU 298 AF : NOTES
 
 
discov_num notes refcode
WCK 2 Aa,Ab: alp Del = 9 Del = Sualocin. Spectroscopic binary now resolved by
interferometry.
Uniform disk diameter 0.407 +/- 0.022 mas,
Limb darkened diameter 0.420 +/- 0.022 mas,
Teff = 13300 +/- 1300 K based on LDD.
Radius is 3.02 +/- 0.19 \rsun. CIA2019a
Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 6.43 +/- 3.52, 4.55, and 2.82 Msun, respectively. Mlk2012
 
 
REFERENCES
 
 
refcode metd author reference
CIA2019a not j Gordon, K.D., Gies, D.R., Schaefer, G.H., Huber, D. & Ireland, M. 2019ApJ...873...91G
CIA2019a ApJ 869, 37, 2018
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 HJ Herschel, J.F.W.
228 WCK Wickes, W.C. & Dicke, R.H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20396+1555 BU 298 AF 2002 8 118 73.8 3.86 10.70 B9IV D 203938.25+155443.4
20396+1555 BU 298 AF 2008 9 118 72.6 3.86 10.70 B9IV D 203938.25+155443.4
20396+1555 BU 298 AF 2015 12 118 72.2 3.86 10.70 B9IV N 203938.25+155443.4

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

 
 
WDS 20396+1555 BU 298 AF : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20396+1555 BU 298 AF : MEASURES
 
 
No records found.

 
 
WDS 20396+1555 : VIRTUAL EYEPIECE
 
 

20396+1555 BU 298A mag 3.86 Sp B9IV 20396+1555 CIA 23Ab mag 3.86 Sp B9IV 20396+1555 CIA 23Ab2 mag 6.43 20396+1555 BU 298B sep 34.6 P.A. 231.60 mag 13.4 20396+1555 HJ 1554C sep 46.5 P.A. 277.70 mag 11.9 20396+1555 BU 298D sep 45.2 P.A. 160.40 mag 12.9 20396+1555 BU 298E sep 55.7 P.A. 304.50 mag 12.6 20396+1555 BU 298F sep 70.0 P.A. 118.50 mag 10.7 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 20396+1555 : ALADIN DSS IMAGE @ 20h 39m 38.25s +15° 54' 43.4"
 
 
 
 
WDS 20396+1555 BU 298 AF : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20396+1555 BU 298AF (Sualocin) distance=0' 20391+1550 BU 288AB distance=10' 20391+1550 BU 288AC distance=10' 20391+1550 BU 288AD distance=10' 20391+1550 BU 288AE distance=10' 20406+1559 BPM2225 distance=16' 20406+1539 HDS2947 distance=22' 20393+1529 HEI 77 distance=24' 20413+1551 UC 4257 distance=25' 20415+1611 J 2319 distance=30' 20391+1526 BPM2219 distance=30' 20375+1557 BPM2214 distance=32' 20383+1623 BPM2216 distance=34' 20411+1631 FMR 161 distance=43' 20366+1553 BPM2207 distance=44' 20374+1626 BPM2212 distance=45' 20402+1503 UC 4251 distance=52' 20388+1500 BU 435 distance=56' 20434+1604 HJ 1564 distance=57' 20435+1540 GWP2990 distance=58' 20436+1537 J 3108 distance=61' 20413+1458 NSN 4 distance=63' 20363+1636 J 3095 distance=65' 20357+1522 ARY 85 distance=66' 20391+1448 LEP 95 distance=68' 20351+1533 J 566 distance=69' 20434+1512 UC 4270 distance=69' 20437+1635 BPM2237 distance=71' 20446+1605 BPM2245 distance=72' 20364+1651 BPM2205 distance=74' 20435+1504 CIA 11 distance=75' 20446+1635 BPM2248AB distance=82' 20446+1635 BPM2249AC distance=82' 20368+1444 STF2703AB distance=82' 20368+1444 STF2703AD distance=82' 20368+1444 STF2703AC distance=82' 20368+1444 STF2703BC distance=82' 20340+1543 CBL 527 distance=83' 20435+1657 STF2720 distance=83' 20446+1635 BPM2250BC distance=84' 20375+1436 BU 151AB (Rotanev) distance=85' 20375+1436 HJ 5545AB,C distance=85' 20375+1436 STF2704AB,D distance=85' 20375+1436 LBZ 1AB,E distance=85' 20348+1644 BPM2195AB distance=85' 20446+1642 BPM2246AB distance=86' 20446+1642 BPM2247AC distance=86' 20348+1644 BPM2196BC distance=87' 20352+1457 SKF1767 distance=87' 20448+1512 BPM2253 distance=87' 20431+1705 BLL 51 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 Sualocin 20396+1555 WCK 2 Aa,Ab 289 0.1
Show Sualocin 20396+1555 BU 298 AB 233 35.5
Show Sualocin 20396+1555 HJ 1554 AC 277 48.4
Show Sualocin 20396+1555 BU 298 AD 160 45.4
Show Sualocin 20396+1555 BU 298 AE 304 57.2
Show Sualocin 20396+1555 BU 298 AF 118 72.2
Show 20396+1555 CIA 23 Ab1,2 250 0.0
Show 20391+1550 BU 288 AB 154 5.2 10
Show 20391+1550 BU 288 AC 122 39.9 10
Show 20391+1550 BU 288 AD 146 28.8 10
Show 20391+1550 BU 288 AE 33 23.3 10
Show 20406+1559 BPM2225 57 22.7 16
Show 20406+1539 HDS2947 111 0.2 22
Show 20393+1529 HEI 77 41 1.4 24
Show 20413+1551 UC 4257 208 20.3 25
Show 20415+1611 J 2319 192 7.5 30
Show 20391+1526 BPM2219 170 85.3 30
Show 20375+1557 BPM2214 90 69.1 32
Show 20383+1623 BPM2216 177 102.9 34
Show 20411+1631 FMR 161 322 27.8 43
Show 20366+1553 BPM2207 49 43.4 44
Show 20374+1626 BPM2212 324 100.7 45
Show 20402+1503 UC 4251 291 52.0 52
Show 20388+1500 BU 435 119 3.1 56
Show 20434+1604 HJ 1564 41 11.4 57
Show 20435+1540 GWP2990 291 26.5 58
Show 20436+1537 J 3108 196 6.3 61
Show 20413+1458 NSN 4 71 4.6 63
Show 20363+1636 J 3095 185 7.7 65
Show 20357+1522 ARY 85 321 83.6 66
Show 20391+1448 LEP 95 151 8.5 68
Show 20351+1533 J 566 119 4.1 69
Show 20434+1512 UC 4270 2 52.2 69
Show 20437+1635 BPM2237 49 108.4 71
Show 20446+1605 BPM2245 198 112.1 72
Show 20364+1651 BPM2205 170 47.0 74
Show 20435+1504 CIA 11 334 0.0 75
Show 20446+1635 BPM2248 AB 95 107.8 82
Show 20446+1635 BPM2249 AC 29 107.0 82
Show 20368+1444 STF2703 AB 290 25.1 82
Show 20368+1444 STF2703 AD 347 84.7 82
Show 20368+1444 STF2703 AC 234 77.8 82
Show 20368+1444 STF2703 BC 215 67.0 82
Show 20340+1543 CBL 527 190 50.3 83
Show 20435+1657 STF2720 177 4.0 83
Show 20446+1635 BPM2250 BC 332 117.2 84
Show Rotanev 20375+1436 BU 151 AB 218 0.2 85
Show 20375+1436 HJ 5545 AB,C 139 12.1 85
Show 20375+1436 STF2704 AB,D 317 47.8 85
Show 20375+1436 LBZ 1 AB,E 271 112.6 85
Show 20348+1644 BPM2195 AB 302 71.3 85

 
 
WDS 20396+1555 : COMPONENTS
 
 
  A Ab Ab2 B C D E
Ab pa=0.0°
sep=0.00"
 
Ab2 pa=249.0°
sep=0.00"
pa=249.0°
sep=0.00"
 
B pa=231.6°
sep=34.61"
pa=231.6°
sep=34.61"
pa=231.6°
sep=34.60"
 
C pa=277.7°
sep=46.54"
pa=277.7°
sep=46.54"
pa=277.7°
sep=46.54"
pa=325.6°
sep=33.60"
 
D pa=160.4°
sep=45.17"
pa=160.4°
sep=45.17"
pa=160.4°
sep=45.17"
pa=116.5°
sep=47.23"
pa=128.5°
sep=78.32"
 
E pa=304.5°
sep=55.73"
pa=304.5°
sep=55.73"
pa=304.5°
sep=55.73"
pa=340.5°
sep=56.31"
pa=0.5°
sep=25.37"
pa=320.5°
sep=96.05"
 
F pa=118.5°
sep=70.05"
pa=118.5°
sep=70.05"
pa=118.5°
sep=70.06"
pa=97.7°
sep=89.48"
pa=110.2°
sep=114.75"
pa=78.9°
sep=47.29"
pa=121.2°
sep=125.61"
 
 
20396+1555 A
 
 
Common name Sualocin Meaning 'Nicolaus' in reverse Other names SVALOCIN, Scalovin Coord arcsec 2000 203938.25+155443.4
Mag 3.86 Spectral class B9IV (blue-white) PmRA 53.00 PmDE 10.0
SAO 106357 HIP 101958 Tycho2 1633-02442-1 HD 196867
HR 7906 GC 28780 ADS 14121 BD BD+15 4222
Bayer Alpha Delphini Bayer name Alp Del Flamsteed 9 Delphini Flamsteed name 9 Del
FK5 774
Tycho2
Tycho2 1633-02442-1 Pflag X RAmdeg DEmdeg
PmRA PmDE E RAmdeg E DEmdeg
E pmRA E pmDE EpRAm EpDEm
Num Q RAmdeg Q DEmdeg Q pmRA
Q pmDE BTmag 3.703 E BTmag 0.014 VTmag 3.753
E VTmag 0.009 Prox 999 TYC T HIP 101958
CCDM AG RAdeg 309.90940361 DEdeg 15.91205361 EpRA 1990 1.71
EpDE 1990 1.43 E RAdeg 3.3 E DEdeg 3.4 Posflg P
Corr -0.1
SAO
SAO 106357 DelFlag RA1950 PmRA1950 0.0045
DE1950 PmDE1950 0 Vmag 3.9 SpType B8
Double code Source 74 CatNum 774 DM BD+15 4222
DMcomp BDsup HD 196867 M HD 0
GC 28780 RA1950rad 5.39880325 DE1950rad 0.27461931 PmRA2000 0.0046
PmDE2000 -0.002
Hipparcos
Catalog H HIP 101958 Proxy H RAhms 20 39 38.25
DEdms +15 54 43.4 Vmag 3.77 VarFlag R Vmag G
RAdeg 309.909 DEdeg 15.9121 AstroRef * Plx 13.55
CCDM 20396+1555 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AG
Theta 221 Rho 0.218 HD 196867 BD BD+15 4222
CD CP Dm number +15 4222 VIred -0.01
SpType B9V R SpType Coord arcsec 2000 203938.25+155443.4
Hipparcos 2
HIP 101958 Sn 55 So 3 Nc 2
RArad 5.4089393078 DErad 0.2777177099 Plx 12.85 PmRA 53.82
PmDE 8.47 E RArad 0.34 E DErad 0.29 E Plx 0.44
E pmRA 0.43 E pmDE 0.31 Hpmag 3.765 E Hpmag 0.0005
SHp 0.005 VA 0 BV -0.057 E BV 0.005
VI -0.01
CCDM
Ccdm 20396+1555 RComp Comp A Note1
Note2 Discov num DRAs 2.28 DDEs -16.5
R dRAs 82 Year Theta Rho
Obs 7 Vmag 3.9 Sp B8 PmNote *
PmRA 53 PmDE 10 Dm number +15 4222 Cat1 BD
Name2 106357 Cat2 SAO HD 196867 M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534A
HIC 101958
 
 
20396+1555 Ab
 
 
Coord arcsec 2000 203938.25+155443.4 Coord calc 203938.24+155443.4 Mag 3.86 Mag composta 6.43
Spectral class B9IV (blue-white) PmRA 66.00 PmDE -2.0 Calc delta mag 2.57
 
 
20396+1555 Ab2
 
 
Coord arcsec 2000 203938.25+155443.4 Mag 6.43 Calc delta mag 2.57 Calc coord yes
 
 
20396+1555 B
 
 
Coord arcsec 2000 203936.37+155421.9 Mag 13.4 Calc delta mag 9.54 Calc coord yes
CCDM
Ccdm 20396+1555 RComp Comp B Note1
Note2 Discov num BU 298 DRAs DDEs
R dRAs Year 1891 Theta 224 Rho 29.5
Obs 4 Vmag 13.4 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534B
HIC
 
 
20396+1555 C
 
 
Coord arcsec 2000 203935.05+155449.6 Mag 11.9 PmRA 33.00 PmDE -5.0
Calc delta mag 8.04 Calc coord yes
CCDM
Ccdm 20396+1555 RComp Comp C Note1
Note2 Discov num HJ 1554 DRAs DDEs
R dRAs Year 1878 Theta 279 Rho 43.4
Obs 6 Vmag 11.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534C
HIC
 
 
20396+1555 D
 
 
Coord arcsec 2000 203939.30+155400.8 Mag 12.9 Calc delta mag 9.04 Calc coord yes
CCDM
Ccdm 20396+1555 RComp Comp D Note1
Note2 Discov num BU 298 DRAs DDEs
R dRAs Year 1959 Theta 155 Rho 46.5
Obs 6 Vmag 12.9 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534D
HIC
 
 
20396+1555 E
 
 
Coord arcsec 2000 203935.07+155515.0 Mag 12.6 Calc delta mag 8.74 Calc coord yes
CCDM
Ccdm 20396+1555 RComp Comp E Note1
Note2 Discov num BU 298 DRAs DDEs
R dRAs Year 1959 Theta 306 Rho 54.5
Obs 5 Vmag 12.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534E
HIC
 
 
20396+1555 F
 
 
Coord arcsec 2000 203942.52+155409.9 Mag 10.7 PmRA -4.00 PmDE -8.0
Calc delta mag 6.84 Calc coord yes
CCDM
Ccdm 20396+1555 RComp Comp F Note1
Note2 Discov num BU 298 DRAs DDEs
R dRAs Year 1911 Theta 115 Rho 79.4
Obs 4 Vmag 10.7 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A14121 M ADS BDS N IDS IDS 20350N1534F
HIC