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Current system
16550-4109
SNA 58 AC
NSV8031


Nearby doubles
6' : 16549-4104
I 101

11' : 16541-4105
SNA 52AB

13' : 16547-4121
TDS 843

14' : 16539-4115
RST1905

16' : 16564-4104
CPO 501

17' : 16547-4053
WG 191

23' : 16554-4047
I 1600

26' : 16573-4108
BRT 939

27' : 16548-4043
WG 192

30' : 16526-4122
CPO 496

30' : 16563-4043
WG 193

31' : 16542-4139
SNA 53AB

32' : 16563-4041
TDT 153

33' : 16563-4040
HDS2394AB

33' : 16525-4126
CPO 495

33' : 16579-4108
KPP3007

35' : 16538-4140
CPO 498

35' : 16550-4035
SEE 304

36' : 16540-4143
SNA 50AB

37' : 16542-4146
SEE 298AB

38' : 16523-4048
RST1903

38' : 16549-4031
SNA 57

40' : 16545-4148
SNA 56AB

41' : 16546-4150
BRT 934

41' : 16523-4136
B 1832AB

41' : 16540-4148
B 1833AB



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Neglected List I
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

16550-4109 SNA 58 AC (NSV8031)

 
 
16h 54m 58.51s -41° 09' 03.1" P.A. 19.00 sep 3.8 mag 4.90,13.18 Sp O8:Ia dist. 694.44 pc (2265.26 l.y.)
 
 
Coord 2000 16550-4109 Discov num SNA  58 Comp AC Coord arcsec 2000 16 54 58.51 -41 09 03.1
Date first 2012 Date last 2012 Obs 1
Pa first 19 Pa last 18.9 P.A. Now (θ) 18.9°
Sep first 3.8 Sep last 3.84 Sep. Now (ρ) 3.84"
Mag pri 4.90 Mag sec 13.18 delta mag (ΔM) 8.28 Spectral class O8:Ia (blue)
Pri motion ra -002 Sec motion ra
Pri motion dec +001 Sec motion dec
Notes N K (See Notes, K-band or other infrared magnitudes)
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
Nature of this double is uncertain.
 
 
16550-4109 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 227425 16 54 59 -41 09 03 I 576 AB 2012 7 262 5.5 5.82 13.00 7.18
Show NSV8031 227425 16 54 59 -41 09 03 SNA 58 AC 2012 1 19 3.8 4.90 13.18 8.28 <===
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV8031 Constellation Scorpius SAO 227425 HIP 82775
Tycho2 7872-01609-1 Gaia DR2 5966563486675142912 HD 152408 HR 6272
CD CD-4010919 CP CP-40 7597 Distance 694.44 Distance ly 2265.26
 
 
WDS 16550-4109 SNA 58 AC (NSV8031) : NOTES
 
 
discov_num notes refcode
I 576 Classification of the B component is by Msn1998a
Lindroos (1985). Lnd1985
The image rotator was in an unknown state, so two possible theta
values are listed for the 2001.4030 observation - one for zenith up
and one for north up. Trn2008
 
 
REFERENCES
 
 
refcode metd author reference
Lnd1985 - Lindroos, K.P. 1985A&AS...60..183L
Lnd1985 A&AS 60, 183, 1985
Msn1998a Sc j Mason, B.D., Gies, D.R., Hartkopf, W.I., Bagnuolo, Jr., W.G., 1998AJ....115..821M
Msn1998a ten Brummelaar, T.A., & McAlister, H.A.
Msn1998a AJ 115, 821, 1998
Trn2008 Ac j Turner, N.H., ten Brummelaar, T.A., Roberts, L.C., Mason, B.D., Hartkopf, W.I., & 2008AJ....136..554T
Trn2008 +E2 Gies, D.R.
Trn2008 +A AJ 136, 554, 2008
Trn2008 (Note: For some observations the image derotator was in an unknown state. In these
Trn2008 cases the theta value is either left blank or two possible values are listed - one
Trn2008 for zenith up and one for north up. For unresolved objects, the listed rho value
Trn2008 is the FWHM of the corrected stellar PSF. Larger FWHM values are indicative of
Trn2008 poorer seeing and/or non-optimal AO system tuning.)
 
 
DISCOVERER
 
 
idgroup discov author
1 I Innes, R.T.A.
5 I MNRAS 57, 533, 1897 (data also in I__1897b,
5 I I__1897c)
91 SNA Sana, H., Gosset, E., Rauw, G., Sung, H., & Vreux, J.-M.
108 SNA Sana, H., LeBouquin, J.-B., Lacour, S., Berger, J.-P., Duvert, G., Gauchet, L.,
108 SNA Norris, B., Olofsson, J., Pickel, D., Zins, G., Absil, O., de Koter, A.,
108 SNA Kratter, K., Schnurr, O., & Zinnecker, H.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16550-4109 SNA 58 AC 2012 1 19 3.8 4.90 13.18 O8:Ia N K 165458.51-410903.1

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

 
 
WDS 16550-4109 SNA 58 AC (NSV8031) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 16550-4109 SNA 58 AC (NSV8031) : MEASURES
 
 
No records found.

 
 
WDS 16550-4109 (NSV8031) : VIRTUAL EYEPIECE
 
 

16550-4109 I 576A mag 5.82 Sp O8If 16550-4109 I 576B sep 4.1 P.A. 260.00 mag 13 16550-4109 SNA 58C sep 3.8 P.A. 14.50 mag 13.18 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 16550-4109 (NSV8031) : ALADIN DSS IMAGE @ 16h 54m 58.51s -41° 09' 03.1"
 
 
 
 
WDS 16550-4109 SNA 58 AC (NSV8031) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

16550-4109 SNA 58AC distance=0' 16549-4104 I 101 distance=6' 16541-4105 SNA 52Aa,Ab distance=11' 16541-4105 SNA 52AB distance=11' 16547-4121 TDS 843 distance=13' 16539-4115 RST1905 distance=14' 16564-4104 CPO 501 distance=16' 16547-4053 WG 191 distance=17' 16554-4047 I 1600 distance=23' 16573-4108 BRT 939 distance=26' 16548-4043 WG 192 distance=27' 16526-4122 CPO 496 distance=30' 16563-4043 WG 193 distance=30' 16542-4139 SNA 53Aa,Ab distance=31' 16542-4139 SNA 53AB distance=31' 16542-4139 SNA 53AC distance=31' 16563-4041 TDT 153 distance=32' 16563-4040 HDS2394AB distance=33' 16563-4040 SNA 60Aa,Ab distance=33' 16563-4040 SNA 60AC distance=33' 16525-4126 CPO 495 distance=33' 16579-4108 KPP3007 distance=33' 16538-4140 CPO 498 distance=35' 16550-4035 SEE 304 distance=35' 16540-4143 SEE 296AC distance=36' 16540-4143 SNA 50AB distance=36' 16542-4146 SEE 298AB distance=37' 16542-4146 SEE 298AC distance=37' 16523-4048 RST1903 distance=38' 16549-4031 SNA 57 distance=38' 16545-4148 SNA 56Aa,Ab distance=40' 16545-4148 SNA 56AB distance=40' 16545-4148 SNA 56AC distance=40' 16540-4148 SEE 294FG distance=40' 16540-4148 HJ 4892FH distance=40' 16540-4148 SNA 51Fa,Fb distance=40' 16546-4150 BRT 934 distance=41' 16523-4136 B 1832AB distance=41' 16523-4136 B 1832AC distance=41' 16540-4148 B 1833AB distance=41' 16540-4148 B 1833AC distance=41' 16540-4148 SEE 293AD distance=41' 16540-4148 SEE 293AE distance=41' 16540-4148 JC 23AF distance=41' 16540-4148 SNA 51Aa,Ab distance=41' 16543-4149 B 1834CD distance=41' 16543-4149 BRT 929AB distance=41' 16544-4150 HJ 4893AB distance=42' 16544-4150 SNA 55AC distance=42' 16544-4150 SNA 55AD distance=42' 16542-4150 CHR 252Aa,Ab distance=42' 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 16550-4109 I 576 AB 262 5.5
Show 16550-4109 SNA 58 AC 19 3.8
Show 16549-4104 I 101 356 1.5 6
Show 16541-4105 SNA 52 Aa,Ab 218 0.0 11
Show 16541-4105 SNA 52 AB 307 3.7 11
Show 16547-4121 TDS 843 91 1.1 13
Show 16539-4115 RST1905 254 0.6 14
Show 16564-4104 CPO 501 158 3.9 16
Show 16547-4053 WG 191 174 8.8 17
Show 16554-4047 I 1600 157 0.4 23
Show 16573-4108 BRT 939 62 6.2 26
Show 16548-4043 WG 192 123 6.2 27
Show 16526-4122 CPO 496 239 5.1 30
Show 16563-4043 WG 193 259 8.7 30
Show 16542-4139 SNA 53 Aa,Ab 1 0.0 31
Show 16542-4139 SNA 53 AB 313 3.2 31
Show 16542-4139 SNA 53 AC 22 5.1 31
Show 16563-4041 TDT 153 55 0.4 32
Show 16563-4040 HDS2394 AB 308 0.3 33
Show 16563-4040 SNA 60 Aa,Ab 285 0.0 33
Show 16563-4040 SNA 60 AC 144 1.5 33
Show 16525-4126 CPO 495 85 4.4 33
Show 16579-4108 KPP3007 37 6.0 33
Show 16538-4140 CPO 498 69 4.5 35
Show 16550-4035 SEE 304 244 18.6 35
Show 16540-4143 SEE 296 AC 240 19.9 36
Show 16540-4143 SNA 50 AB 213 4.3 36
Show 16542-4146 SEE 298 AB 286 6.2 37
Show 16542-4146 SEE 298 AC 144 17.7 37
Show 16523-4048 RST1903 313 1.2 38
Show 16549-4031 SNA 57 115 0.1 38
Show 16545-4148 SNA 56 Aa,Ab 63 0.0 40
Show 16545-4148 SNA 56 AB 187 3.2 40
Show 16545-4148 SNA 56 AC 141 3.5 40
Show 16540-4148 SEE 294 FG 47 6.7 40
Show 16540-4148 HJ 4892 FH 300 8.8 40
Show 16540-4148 SNA 51 Fa,Fb 54 0.0 40
Show 16546-4150 BRT 934 266 3.0 41
Show 16523-4136 B 1832 AB 234 4.1 41
Show 16523-4136 B 1832 AC 143 5.2 41
Show 16540-4148 B 1833 AB 75 0.5 41
Show 16540-4148 B 1833 AC 99 5.4 41
Show 16540-4148 SEE 293 AD 127 19.1 41
Show 16540-4148 SEE 293 AE 281 20.5 41
Show 16540-4148 JC 23 AF 19 56.7 41
Show 16540-4148 SNA 51 Aa,Ab 153 0.0 41
Show 16543-4149 B 1834 CD 313 4.6 41
Show 16543-4149 BRT 929 AB 197 3.9 41
Show 16544-4150 HJ 4893 AB 52 7.3 42
Show 16544-4150 SNA 55 AC 40 1.1 42
Show 16544-4150 SNA 55 AD 326 3.4 42

 
 
WDS 16550-4109 : COMPONENTS
 
 
  A B
B pa=260.0°
sep=4.13"
 
C pa=14.5°
sep=3.75"
pa=49.0°
sep=6.63"
 
 
16550-4109 A
 
 
Coord arcsec 2000 165458.51-410903.1 Mag 5.82 Spectral class O8If (blue) PmRA -2.00
PmDE 1.0 SAO 227425 HIP 82775 Tycho2 7872-01609-1
HD 152408 HR 6272 GC 22768 CD CD-4010919
CP CP-40 7597
Tycho2
Tycho2 7872-01609-1 Pflag RAmdeg 253.74377059 DEmdeg -41.15085471
PmRA -0.3 PmDE -0.2 E RAmdeg 4 E DEmdeg 4
E pmRA 1.1 E pmDE 1.1 EpRAm 1991.37 EpDEm 1991.19
Num 15 Q RAmdeg 1.8 Q DEmdeg 0.8 Q pmRA 1.6
Q pmDE 0.8 BTmag 5.967 E BTmag 0.015 VTmag 5.825
E VTmag 0.010 Prox 691 TYC T HIP 82775
CCDM RAdeg 253.74377167 DEdeg -41.15085444 EpRA 1990 1.74
EpDE 1990 1.54 E RAdeg 3.7 E DEdeg 4.1 Posflg
Corr 0.1
SAO
SAO 227425 DelFlag RA1950 PmRA1950 -0.0015
DE1950 PmDE1950 -0.014 Vmag 6 SpType Oep
Double code Source 70 CatNum 22768 DM CD-4010919
DMcomp BDsup HD 152408 M HD 0
GC 22768 RA1950rad 4.41341442 DE1950rad -0.71682376 PmRA2000 -0.0015
PmDE2000 -0.013
Hipparcos
Catalog H HIP 82775 Proxy RAhms 16 54 58.51
DEdms -41 09 03.1 Vmag 5.78 VarFlag 1 R Vmag H
RAdeg 253.744 DEdeg -41.1509 AstroRef Plx 0.34
CCDM 16550-4109 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 152408 BD
CD CD-4010919 CP CP-40 7597 Dm number -4010919 VIred 0.12
SpType O8Iab+... R SpType Coord arcsec 2000 165458.51-410903.1
Hipparcos 2
HIP 82775 Sn 5 So 0 Nc 1
RArad 4.4286642794 DErad -0.7182179035 Plx 1.44 PmRA 0.47
PmDE -2.25 E RArad 0.3 E DErad 0.22 E Plx 0.34
E pmRA 0.37 E pmDE 0.26 Hpmag 5.8276 E Hpmag 0.0019
SHp 0.011 VA 2 BV 0.132 E BV 0.008
VI 0.15
CCDM
Ccdm 16550-4109 RComp Comp A Note1
Note2 Discov num DRAs -1.48 DDEs -2.8
R dRAs 10 Year Theta Rho
Obs 2 Vmag 6.0 Sp OE PmNote *
PmRA PmDE Dm number -4010919 Cat1 CD
Name2 227425 Cat2 SAO HD 152408 M HD
ADS BDS M ADS BDS N IDS IDS 16480S4059A
HIC 82775
 
 
16550-4109 B
 
 
Coord arcsec 2000 165458.15-410903.8 Mag 13 Calc delta mag 7.18 Calc coord yes
CCDM
Ccdm 16550-4109 RComp Comp B Note1
Note2 Discov num I 576 DRAs DDEs
R dRAs Year 1913 Theta 265 Rho 5.4
Obs 2 Vmag 13.0 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS M ADS BDS N IDS IDS 16480S4059B
HIC 82775
 
 
16550-4109 C
 
 
Coord arcsec 2000 165458.59-410859.5 Mag 13.18 Calc delta mag 7.36 Calc coord yes