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Current system
18553-2618
BED 1 Aa,Ab


Nearby doubles
38' : 18544-2543
RST3204

43' : 18572-2652
TSN 65

48' : 18536-2536
RST3202

52' : 18591-2612
I 1389

52' : 18591-2609
B 415

53' : 18517-2641
RST2079

58' : 18512-2601
OCC 66

65' : 18593-2653
RSS 501

65' : 18579-2524
B 2871AB

66' : 18592-2540
TDT1167

69' : 18506-2646
B 409

71' : 18544-2727
B 411

75' : 18502-2647
J 1637

76' : 18560-2503
B 413

85' : 18497-2538
B 407

87' : 18489-2603
B 406

93' : 18531-2745
I 1031

96' : 18512-2500
B 410

97' : 18521-2452
WFC 214

103' : 18594-2744
B 2465

103' : 19024-2541
HDS2699

104' : 19028-2634
TDT1198

104' : 18554-2801
TVB 305

106' : 18534-2435
OCC 54

109' : 18496-2736
OCC 153

109' : 18581-2436
RST3207



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

18553-2618 BED 1 Aa,Ab

 
 
18h 55m 15.92s -26° 17' 48.2" P.A. 202.00 sep 0.0 mag 2.04, Sp B2.5V dist. 69.83 pc (227.79 l.y.)
 
 
Coord 2000 18553-2618 Discov num BED   1 Comp Aa,Ab Coord arcsec 2000 18 55 15.92 -26 17 48.2
Date first 1991 Date last 1991 Obs 1
Pa first 202 Pa last 202 P.A. Now (θ) 202°
Sep first 0.0 Sep last 0.012 Sep. Now (ρ) 0.012"
Mag pri 2.04 Mag sec delta mag (ΔM) Spectral class B2.5V (blue-white)
Pri motion ra +014 Sec motion ra
Pri motion dec -053 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
18553-2618 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 187448 18 55 16 -26 17 48 BED 1 Aa,Ab 1991 1 202 0.0 2.04 <===
Show Nunki 187448 18 55 16 -26 17 48 SMY 4 AB 1999 4 239 349.0 2.04 9.95 7.91
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Common name Nunki Constellation Sagittarius SAO 187448 HIP 92855
Tycho2 6868-01829-1 HD 175191 HR 7121 GC 25941
CD CD-2613595 CP CP-26 6590 Bayer Sigma Sagittarii Bayer name Sig Sgr
Flamsteed 34 Sagittarii Flamsteed name 34 Sgr FK5 706 Distance 69.83
Distance ly 227.79 Bayer greek σ Sgr
Other names SADIRA
Meaning the Sumerian god of the waters 'Enki'
 
 
WDS 18553-2618 BED 1 Aa,Ab : NOTES
 
 
discov_num notes refcode
BED 1 Aa,Ab: Measure of 1991.566 made by MAPPIT. Bed1994
SMY 4 AB: sig Sgr = 34 Sgr = Nunki. B is CD-26@13591.
 
 
REFERENCES
 
 
refcode metd author reference
Bed1994 Sa j Bedding, T.R., Robertson, J.G., & Marson, R.G. 1994A&A...290..340B
Bed1994 A&A 290, 340-348, 1994
 
 
DISCOVERER
 
 
idgroup discov author
1 SMY Smyth, W.H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18553-2618 BED 1 Aa,Ab 1991 1 202 0.0 2.02   B2.5V N 185515.92-261747.7

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

 
 
WDS 18553-2618 BED 1 Aa,Ab : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18553-2618 BED 1 Aa,Ab : MEASURES
 
 
No records found.

 
 
WDS 18553-2618 : VIRTUAL EYEPIECE
 
 

18553-2618 SMY 4A mag 2.04 Sp B2.5V 18553-2618 BED 1Ab 18553-2618 SMY 4B sep 322.7 P.A. 236.30 mag 9.95 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 18553-2618 : ALADIN DSS IMAGE @ 18h 55m 15.92s -26° 17' 48.2"
 
 
 
 
WDS 18553-2618 BED 1 Aa,Ab : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18553-2618 BED 1Aa,Ab (Nunki) distance=0' 18544-2543 RST3204 distance=38' 18572-2652 TSN 65 distance=43' 18536-2536 RST3202 distance=48' 18591-2612 I 1389 distance=52' 18591-2609 B 415 distance=52' 18517-2641 RST2079 distance=53' 18512-2601 OCC 66 distance=58' 18593-2653 RSS 501 distance=65' 18579-2524 B 2871AB distance=65' 18579-2524 SIN 112AC distance=65' 18592-2540 TDT1167 distance=66' 18506-2646 B 409 distance=69' 18544-2727 B 411 distance=71' 18502-2647 J 1637 distance=75' 18560-2503 B 413 distance=76' 18497-2538 B 407 distance=85' 18489-2603 B 406 distance=87' 18531-2745 I 1031 distance=93' 18512-2500 B 410 distance=96' 18521-2452 WFC 214 distance=97' 18594-2744 B 2465 distance=103' 19024-2541 HDS2699 distance=103' 19028-2634 TDT1198 distance=104' 18554-2801 TVB 305 distance=104' 18534-2435 OCC 54 distance=106' 18496-2736 OCC 153 distance=109' 18581-2436 RST3207 distance=109' 19013-2733 B 418 distance=111' 18560-2808 SEE 364 distance=111' 19035-2645 LDS5870AB distance=114' 19035-2645 LDS5870Aa,Ab distance=114' 18510-2431 J 1751 distance=122' 18554-2413 OCC1045 distance=126' 18555-2413 OCC1047 distance=126' 19010-2439 COO 230 distance=126' 18459-2637 J 2229 distance=128' 19037-2510 RST3211 distance=133' 18456-2651 I 1382 distance=135' 18457-2659 OCC9185 distance=136' 18463-2721 B 405 distance=136' 18465-2511 RST3197 distance=137' 19048-2532 RST3213 distance=137' 18549-2357 RCH 7AB distance=141' 18549-2357 OCC1044Aa,Ab distance=141' 18549-2357 OCC1044Aa,Ac distance=141' 19057-2639 OCC 768AB distance=143' 19057-2639 SKF2073AC distance=143' 19055-2534 BRT3081 distance=144' 18447-2548 SEE 358 distance=145' 19061-2634 RST2087AB distance=148' 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 Nunki 18553-2618 BED 1 Aa,Ab 202 0.0
Show Nunki 18553-2618 SMY 4 AB 239 349.0
Show 18544-2543 RST3204 225 2.7 38
Show 18572-2652 TSN 65 338 70.2 43
Show 18536-2536 RST3202 50 0.2 48
Show 18591-2612 I 1389 105 5.4 52
Show 18591-2609 B 415 1 4.6 52
Show 18517-2641 RST2079 197 1.9 53
Show 18512-2601 OCC 66 -1 0.1 58
Show 18593-2653 RSS 501 124 11.5 65
Show 18579-2524 B 2871 AB 296 14.7 65
Show 18579-2524 SIN 112 AC 94 54.3 65
Show 18592-2540 TDT1167 99 0.6 66
Show 18506-2646 B 409 258 5.2 69
Show 18544-2727 B 411 40 4.1 71
Show 18502-2647 J 1637 16 5.2 75
Show 18560-2503 B 413 247 6.2 76
Show 18497-2538 B 407 358 0.8 85
Show 18489-2603 B 406 315 1.7 87
Show 18531-2745 I 1031 349 0.4 93
Show 18512-2500 B 410 190 0.8 96
Show 18521-2452 WFC 214 262 9.3 97
Show 18594-2744 B 2465 189 7.4 103
Show 19024-2541 HDS2699 190 0.2 103
Show 19028-2634 TDT1198 287 0.6 104
Show 18554-2801 TVB 305 192 2.0 104
Show 18534-2435 OCC 54 -1 0.1 106
Show 18496-2736 OCC 153 -1 0.1 109
Show 18581-2436 RST3207 303 2.7 109
Show 19013-2733 B 418 155 1.7 111
Show 18560-2808 SEE 364 127 0.9 111
Show 19035-2645 LDS5870 AB 282 17.4 114
Show 19035-2645 LDS5870 Aa,Ab 68 0.5 114
Show 18510-2431 J 1751 281 13.7 122
Show 18554-2413 OCC1045 -1 0.0 126
Show 18555-2413 OCC1047 -1 0.0 126
Show 19010-2439 COO 230 195 8.5 126
Show 18459-2637 J 2229 26 3.7 128
Show 19037-2510 RST3211 137 3.4 133
Show 18456-2651 I 1382 200 0.4 135
Show 18457-2659 OCC9185 10 0.2 136
Show 18463-2721 B 405 136 0.5 136
Show 18465-2511 RST3197 156 0.3 137
Show 19048-2532 RST3213 145 2.3 137
Show 18549-2357 RCH 7 AB 20 1.6 141
Show 18549-2357 OCC1044 Aa,Ab -1 0.0 141
Show 18549-2357 OCC1044 Aa,Ac -1 0.0 141
Show 19057-2639 OCC 768 AB 179 0.1 143
Show 19057-2639 SKF2073 AC 160 13.6 143
Show 19055-2534 BRT3081 97 4.4 144
Show 18447-2548 SEE 358 69 1.2 145

 
 
WDS 18553-2618 : COMPONENTS
 
 
  A Ab
Ab pa=199.9°
sep=0.01"
 
B pa=236.3°
sep=322.72"
pa=236.3°
sep=322.71"
 
 
18553-2618 A
 
 
Common name Nunki Meaning the Sumerian god of the waters 'Enki' Other names SADIRA Coord arcsec 2000 185515.92-261748.2
Mag 2.04 Spectral class B2.5V (blue-white) PmRA 13.00 PmDE -54.0
SAO 187448 HIP 92855 Tycho2 6868-01829-1 HD 175191
HR 7121 GC 25941 CD CD-2613595 CP CP-26 6590
Bayer Sigma Sagittarii Bayer name Sig Sgr Flamsteed 34 Sagittarii Flamsteed name 34 Sgr
FK5 706
SAO
SAO 187448 DelFlag RA1950 PmRA1950 0.001
DE1950 PmDE1950 -0.054 Vmag 2.1 SpType B3
Double code Source 74 CatNum 706 DM CD-2613595
DMcomp BDsup HD 175191 M HD 0
GC 25941 RA1950rad 4.94000366 DE1950rad -0.46007989 PmRA2000 0.0009
PmDE2000 -0.054
Hipparcos
Catalog H HIP 92855 Proxy RAhms 18 55 15.92
DEdms -26 17 47.7 Vmag 2.05 VarFlag 1 R Vmag H
RAdeg 283.816 DEdeg -26.2966 AstroRef Plx 14.54
CCDM 18552-2618 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 175191 BD
CD CD-2613595 CP CP-26 6590 Dm number -2613595 VIred -0.21
SpType B2.5V R SpType Coord arcsec 2000 185515.92-261747.7
Hipparcos 2
HIP 92855 Sn 5 So 0 Nc 1
RArad 4.9535292437 DErad -0.4589621517 Plx 14.32 PmRA 15.14
PmDE -53.43 E RArad 0.27 E DErad 0.15 E Plx 0.29
E pmRA 0.29 E pmDE 0.19 Hpmag 2.0095 E Hpmag 0.0008
SHp 0.005 VA 0 BV -0.134 E BV 0.006
VI -0.13
 
 
18553-2618 Ab
 
 
Coord arcsec 2000 185515.92-261748.2 Calc delta mag 2.04 Calc coord yes
 
 
18553-2618 B
 
 
Coord arcsec 2000 185455.96-262047.4 Mag 9.95 PmRA 1.00 PmDE -11.0
Calc delta mag 7.91 Calc coord yes