18181-1215 SS    7AJ

 
 
18h 18m 05.90s -12 14' 33.3" P.A. 258 sep 45.3 mag 7.45,11.42 Sp O8Ia dist. 662.25 pc (2160.26 l.y.)
 
 
Coord 2000
18181-1215
Discov num
SS    7
Comp
AJ
Coord arcsec 2000
18 18 05.90 -12 14 33.3
Date first
1906
Date last
2000
Obs
4
Pa first
258
Pa last
258
P.A. Now (θ)
258°
Sep first
44.8
Sep last
45.3
Sep. Now (ρ)
45.3"
Mag pri
7.45
Mag sec
11.42
delta mag (ΔM)
3.97
Spectral class
O8Ia (blue)
Pri motion ra
-000
Sec motion ra
Pri motion dec
-003
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
18181-1215 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161292 18181-1215 DBK 1 Aa,Ab 2008 2016 15 292 0.0 7.45
Show MY Ser 161292 18181-1215 TRN 27 AB 2001 2012 3 40 4.8 7.45 16.00 8.55
Show 161292 18181-1215 SS 7 AC 1953 2000 3 191 14.7 7.45 14.30 6.85
Show 161292 18181-1215 SS 7 AD 1906 2000 7 260 18.1 7.45 12.90 5.45
Show 161292 18181-1215 SS 7 AE 1906 2000 6 217 18.2 7.45 13.00 5.55
Show 161292 18181-1215 SS 7 AF 1906 2000 10 16 30.1 7.45 10.80 3.35
Show 161292 18181-1215 SS 7 AG 1953 2000 4 9 39.3 7.45 15.50 8.05
Show 161292 18181-1215 SS 7 AH 1907 2000 6 268 40.8 7.45 9.80 2.35
Show 161292 18181-1215 SS 7 AI 1953 2000 3 299 45.8 7.45 13.70 6.25
Show 161292 18181-1215 SS 7 AJ 1906 2000 4 258 45.3 7.45 11.42 3.97 <===
Show 161292 18181-1215 SS 7 AK 1907 2000 4 262 48.6 7.45 10.51 3.06
Show 161292 18181-1215 SS 7 AL 1953 2000 4 348 51.7 7.45 14.50 7.05
Show 161292 18181-1215 SS 7 AM 1953 2000 4 254 64.4 7.45 15.30 7.85
Show 161292 18181-1215 SS 7 AN 1953 2000 4 279 71.0 7.45 15.10 7.65
Show 161292 18181-1215 SS 7 AO 1953 2000 4 305 72.0 7.45 15.90 8.45
Show 161292 18181-1215 SS 7 AP 1907 2000 6 286 72.5 7.45 10.40 2.95
Show 161292 18181-1215 SS 7 AQ 1907 2000 5 291 84.7 7.45 11.70 4.25
Show 161292 18181-1215 BRT2749 KJ 1906 2000 5 121 4.4 10.51 11.42 0.91
18-fold system
17 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name
MY Ser
Constellation
Serpens
SAO
161292
HIP
89681
Tycho2
5685-04419-1
HD
167971
BD
BD-12 4980
Distance
662.25
Distance ly
2160.26
last precise pa
258.4
last precise sep
45.33
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18181-1215 SS 7 AJ 2000 4 258 45.3 7.45 11.42 O8Ia N 181805.90-121433.3

If you need more information about this double, apply for a data request form to the WDS.
 
 
WDS 18181-1215 SS 7AJ : NOTES
 
 
discov_num notes refcode
TRN 27 The image rotator was in an unknown state, so two possible theta
values are listed for the 2001.7447 observation - one for zenith up
and one for north up. Trn2008
HD 167971 Leitherer et al. (1987 A&A 185, 121) argue that this is a triple
system consisting of a close eclipsing pair and a brighter, distant O
star; the spectral classification presumably applies to the latter
star. Msn1998a
DBK 1 Aa,Ab: System includes a 3.3d eclipsing binary, unresolved in the VLTI
observations. De Becker et al. (2012) assume the components of the
close pair are both O6.5V, and the wide component is O8I. V=7.35 for
the system yields a distance of about 1.8 kpc, in good agreement with
the 1.7 kpc distance determined by Reipurth (2008 Handbook of Star
Forming Regions, vol 2, 590) for the NGC 6604 open cluster. The Aa,Ab
orbit is thought to be very eccentric. DBk2012
 
 
REFERENCES
 
 
refcode metd author reference
DBk2012 Kv j De Becker, M., Sana, H., Absil, O., Le Bouquin, J.-B., & Blomme, R. 2012MNRAS.423.2711D
DBk2012 +orb MNRAS 423, 2711, 2012
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
 
 
discov author
SS Sharpless, S.

 
 
WDS 18181-1215 SS 7AJ : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18181-1215 SS 7AJ : MEASURES
 
 
No records found.

 
 
WDS 18181-1215 SS 7AJ : Virtual Eyepiece
 
 

18181-1215  TRN  27 A 18181-1215  DBK   1Aa,Ab P.A. 292 mag 7.45, Sp O8Ia 18181-1215  TRN  27AB sep 4.8 P.A. 40 mag 7.45,16.00 Sp O8Ia 18181-1215  SS    7AC sep 14.7 P.A. 191 mag 7.45,14.30 Sp O8Ia 18181-1215  SS    7AD sep 18.1 P.A. 260 mag 7.45,12.90 Sp O8Ia 18181-1215  SS    7AE sep 18.2 P.A. 217 mag 7.45,13.00 Sp O8Ia 18181-1215  SS    7AF sep 30.1 P.A. 16 mag 7.45,10.80 Sp O8Ia+B0 18181-1215  SS    7AG sep 39.3 P.A. 9 mag 7.45,15.50 Sp O8Ia 18181-1215  SS    7AH sep 40.8 P.A. 268 mag 7.45,9.80 Sp O8Ia+O9.5 18181-1215  SS    7AI sep 45.8 P.A. 299 mag 7.45,13.70 Sp O8Ia 18181-1215  SS    7AJ sep 45.3 P.A. 258 mag 7.45,11.42 Sp O8Ia 18181-1215  SS    7AK sep 48.6 P.A. 262 mag 7.45,10.51 Sp O8Ia+B 18181-1215  SS    7AL sep 51.7 P.A. 348 mag 7.45,14.50 Sp O8Ia 18181-1215  SS    7AM sep 64.4 P.A. 254 mag 7.45,15.30 Sp O8Ia 18181-1215  SS    7AN sep 71 P.A. 279 mag 7.45,15.10 Sp O8Ia 18181-1215  SS    7AO sep 72 P.A. 305 mag 7.45,15.90 Sp O8Ia 18181-1215  SS    7AP sep 72.5 P.A. 286 mag 7.45,10.40 Sp O8Ia+B 18181-1215  SS    7AQ sep 84.7 P.A. 291 mag 7.45,11.70 Sp O8Ia 18181-1215  BRT2749KJ sep 4.4 P.A. 121 mag 10.51,11.42 Sp B virtual eyepiece
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Radius:
 
 
WDS 18181-1215 SS 7AJ : Aladin DSS image @ 18h 18m 05.90s -12 14' 33.3"
 
 
 
 
WDS 18181-1215 SS 7AJ : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only


18181-1215  DBK   1Aa,Ab distance=1' 18181-1215  TRN  27AB distance=1' 18181-1215  SS    7AC distance=1' 18181-1215  SS    7AD distance=1' 18181-1215  SS    7AE distance=1' 18181-1215  SS    7AF distance=1' 18181-1215  SS    7AG distance=1' 18181-1215  SS    7AH distance=1' 18181-1215  SS    7AI distance=1' 18181-1215  SS    7AJ distance=1' 18181-1215  SS    7AK distance=1' 18181-1215  SS    7AL distance=1' 18181-1215  SS    7AM distance=1' 18181-1215  SS    7AN distance=1' 18181-1215  SS    7AO distance=1' 18181-1215  SS    7AP distance=1' 18181-1215  SS    7AQ distance=1' 18181-1215  BRT2749KJ distance=1' 18187-1206  SNA  90Aa,Ab distance=12' 18187-1206  SNA  90AB distance=12' 18187-1206  SNA  90AC distance=12' 18182-1159  SKF1505 distance=16' 18183-1157  BRT2750 distance=18' 18181-1155  TDT 783 distance=20' 18164-1214  BRT2747 distance=25' 18184-1239  TDT 785 distance=26' 18195-1242  RST4006 distance=34' 18166-1247  TSN  45 distance=40' 18202-1137  BRT2751 distance=49' 18207-1138  SKF2802 distance=53' 18181-1310  HU   59 distance=56' 18181-1118  SNA  86 distance=57' 18218-1155  EGN  22AB distance=59' 18218-1155  EGN  22AC distance=59' 18218-1155  EGN  22AD distance=59' 18218-1155  EGN  22AE distance=59' 18218-1155  EGN  22AF distance=59' 18218-1155  EGN  22AG distance=59' 18218-1155  EGN  22AH distance=59' 18218-1155  EGN  22AI distance=59' 18218-1155  EGN  22AJ distance=59' 18218-1155  EGN  22AK distance=59' 18218-1155  EGN  22AL distance=59' 18218-1155  EGN  22AM distance=59' 18218-1155  EGN  22AN distance=59' 18218-1155  EGN  22AO distance=59' 18218-1155  EGN  22AP distance=59' 18218-1155  EGN  22AQ distance=59' 18218-1155  EGN  22AR distance=59' 18218-1139  HU   62 distance=66' 18226-1152  BU 1252 distance=71' grafico limitrofi
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Pass over with the mouse cursor to display the catalog designation.

Show name coord_2000 discov# comp sep pa dist(')
Show 18181-1215 DBK 1 Aa,Ab 0 292 1
Show 18181-1215 TRN 27 AB 4.80 40 1
Show 18181-1215 SS 7 AC 14.70 191 1
Show 18181-1215 SS 7 AD 18.10 260 1
Show 18181-1215 SS 7 AE 18.20 217 1
Show 18181-1215 SS 7 AF 30.10 16 1
Show 18181-1215 SS 7 AG 39.30 9 1
Show 18181-1215 SS 7 AH 40.80 268 1
Show 18181-1215 SS 7 AI 45.80 299 1
Show 18181-1215 SS 7 AJ 45.30 258 1
Show 18181-1215 SS 7 AK 48.60 262 1
Show 18181-1215 SS 7 AL 51.70 348 1
Show 18181-1215 SS 7 AM 64.40 254 1
Show 18181-1215 SS 7 AN 71 279 1
Show 18181-1215 SS 7 AO 72 305 1
Show 18181-1215 SS 7 AP 72.50 286 1
Show 18181-1215 SS 7 AQ 84.70 291 1
Show 18181-1215 BRT2749 KJ 4.40 121 1
Show 18187-1206 SNA 90 Aa,Ab 0 303 12
Show 18187-1206 SNA 90 AB 3 34 12
Show 18187-1206 SNA 90 AC 7.60 267 12
Show 18182-1159 SKF1505 3.10 4 16
Show 18183-1157 BRT2750 1.50 40 18
Show 18181-1155 TDT 783 0.50 67 20
Show 18164-1214 BRT2747 4 5 25
Show 18184-1239 TDT 785 1 252 26
Show 18195-1242 RST4006 0.80 244 34
Show 18166-1247 TSN 45 15.60 315 40
Show 18202-1137 BRT2751 3.90 24 49
Show 18207-1138 SKF2802 5.60 345 53
Show 18181-1310 HU 59 1 343 56
Show 18181-1118 SNA 86 7.20 68 57
Show 18218-1155 EGN 22 AB 3.30 141 59
Show 18218-1155 EGN 22 AC 3.70 47 59
Show 18218-1155 EGN 22 AD 5.60 243 59
Show 18218-1155 EGN 22 AE 5.90 354 59
Show 18218-1155 EGN 22 AF 7.30 106 59
Show 18218-1155 EGN 22 AG 8.50 290 59
Show 18218-1155 EGN 22 AH 8.80 218 59
Show 18218-1155 EGN 22 AI 8.90 132 59
Show 18218-1155 EGN 22 AJ 10.40 294 59
Show 18218-1155 EGN 22 AK 10.60 337 59
Show 18218-1155 EGN 22 AL 12.20 310 59
Show 18218-1155 EGN 22 AM 12.80 9 59
Show 18218-1155 EGN 22 AN 12.90 334 59
Show 18218-1155 EGN 22 AO 14.50 338 59
Show 18218-1155 EGN 22 AP 19.60 293 59
Show 18218-1155 EGN 22 AQ 23.50 309 59
Show 18218-1155 EGN 22 AR 25.70 312 59
Show 18218-1139 HU 62 0.50 25 66
Show 18226-1152 BU 1252 0.80 154 71