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Current system
18187-1206
SNA 90 AB


Nearby doubles
11' : 18183-1157
BRT2750

11' : 18182-1159
SKF1505

12' : 18181-1215
TRN 27AB

13' : 18181-1214
LNV 7

14' : 18181-1155
TDT 783

17' : 18175-1206
WRS 12

21' : 18188-1227
SZA 5

34' : 18184-1239
TDT 785

34' : 18164-1214
BRT2747

37' : 18195-1242
RST4006

37' : 18202-1137
BRT2751

42' : 18207-1138
SKF2802

48' : 18218-1155
EGN 22AB
Alasia

50' : 18181-1118
SNA 86

51' : 18166-1247
TSN 45

54' : 18218-1139
HU 62

60' : 18226-1152
BU 1252

65' : 18181-1310
HU 59

65' : 18228-1229
KPP4106

66' : 18189-1101
HU 60

68' : 18161-1111
HDS2579

75' : 18234-1137
BVD 126

80' : 18146-1113
HLD 142

82' : 18242-1213
HU 63

82' : 18210-1321
BWE 2

88' : 18143-1306
RST4003



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

18187-1206 SNA 90 AB

 
 
18h 18m 40.86s -12° 06' 23.3" P.A. 34.00 sep 3.0 mag 6.63,13.70 Sp O5IV+
 
 
Coord 2000 18187-1206 Discov num SNA  90 Comp AB Coord arcsec 2000 18 18 40.86 -12 06 23.3
Date first 2012 Date last 2012 Obs 1
Pa first 34 Pa last 33.8 P.A. Now (θ) 33.8°
Sep first 3.0 Sep last 3 Sep. Now (ρ) 3"
Mag pri 6.63 Mag sec 13.70 delta mag (ΔM) 7.07 Spectral class O5IV+ (blue)
Pri motion ra +001 Sec motion ra
Pri motion dec -002 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.
 
 
18187-1206 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 18 18 41 -12 06 23 SNA 90 Aa,Ab 2012 1 303 0.0 7.40 7.60 0.20
Show 18 18 41 -12 06 23 SNA 90 AB 2012 1 34 3.0 6.63 13.70 7.07 <===
Show 18 18 41 -12 06 23 SNA 90 AC 2012 1 267 7.6 6.63 14.00 7.37
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Serpens Gaia DR2 4153666106124493696
 
 
WDS 18187-1206 SNA 90 AB : NOTES
 
 
discov_num notes refcode
SNA 90 Aa,Ab: Object is a non-thermal radio emitter (DeBecker et al. 2004). DBk2004
PIONIER clearly resolved it into a tight pair (3.3mas) with almost
equal brightness (dH=0.17 +/- 0.19). Sna2014
 
 
REFERENCES
 
 
refcode metd author reference
DBk2004 not - De Becker, M., Rauw, G., Blomme, R., Waldron, W.L., Sana, H., Pittard, J.M., 2004A&A...420.1061D
DBk2004 +Kv Eenens, P., Stevens, I.R., Runacres, M.C., Van Loo, S., & Pollock, A.M.T.
DBk2004 A&A 420, 1061, 2004
Sna2014 Kv j Sana, H., LeBouquin, J.-B., Lacour, S., Berger, J.-P., Duvert, G., Gauchet, L., 2014ApJS..215...15S
Sna2014 +A Norris, B., Olofsson, J., Pickel, D., Zins, G., Absil, O., de Koter, A.,
Sna2014 Kratter, K., Schnurr, O., & Zinnecker, H.
Sna2014 ApJS 215, 15, 2014
Sna2014 (NACO companions in Table 6 assumed physical if quoted probability of spurious
Sna2014 detection <10%, optical if >90%, otherwise indeterminate)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18187-1206 SNA 90 AB 2012 1 34 3.0 6.63 13.70 O5III K 181840.86-120623.3

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

 
 
WDS 18187-1206 SNA 90 AB : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 18187-1206 SNA 90 AB : MEASURES
 
 
No records found.

 
 
WDS 18187-1206 : VIRTUAL EYEPIECE
 
 

18187-1206 SNA 90A mag 6.63 Sp O5IV 18187-1206 SNA 90Ab mag 7.6 Sp O6IV 18187-1206 SNA 90B sep 3.0 P.A. 33.20 mag 13.7 18187-1206 SNA 90C sep 7.5 P.A. 266.70 mag 14 virtual eyepiece
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Radius:
Components only
 
 
WDS 18187-1206 : ALADIN DSS IMAGE @ 18h 18m 40.86s -12° 06' 23.3"
 
 
 
 
WDS 18187-1206 SNA 90 AB : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

18187-1206 SNA 90AB distance=0' 18183-1157 BRT2750 distance=11' 18182-1159 SKF1505 distance=11' 18181-1215 DBK 1Aa,Ab distance=12' 18181-1215 TRN 27AB distance=12' 18181-1215 SS 7AC distance=12' 18181-1215 SS 7AD distance=12' 18181-1215 SS 7AE distance=12' 18181-1215 SS 7AF distance=12' 18181-1215 SS 7AG distance=12' 18181-1215 SS 7AH distance=12' 18181-1215 SS 7AI distance=12' 18181-1215 SS 7AJ distance=12' 18181-1215 SS 7AK distance=12' 18181-1215 SS 7AL distance=12' 18181-1215 SS 7AM distance=12' 18181-1215 SS 7AN distance=12' 18181-1215 SS 7AO distance=12' 18181-1215 SS 7AP distance=12' 18181-1215 SS 7AQ distance=12' 18181-1215 BRT2749KJ distance=13' 18181-1214 LNV 7 distance=13' 18181-1155 TDT 783 distance=14' 18175-1206 WRS 12 distance=17' 18188-1227 SZA 5 distance=21' 18184-1239 TDT 785 distance=34' 18164-1214 BRT2747 distance=34' 18195-1242 RST4006 distance=37' 18202-1137 BRT2751 distance=37' 18207-1138 SKF2802 distance=42' 18218-1155 EGN 22AB (Alasia) distance=48' 18218-1155 EGN 22AC (Alasia) distance=48' 18218-1155 EGN 22AD (Alasia) distance=48' 18218-1155 EGN 22AE (Alasia) distance=48' 18218-1155 EGN 22AF (Alasia) distance=48' 18218-1155 EGN 22AG (Alasia) distance=48' 18218-1155 EGN 22AH (Alasia) distance=48' 18218-1155 EGN 22AI (Alasia) distance=48' 18218-1155 EGN 22AJ (Alasia) distance=48' 18218-1155 EGN 22AK (Alasia) distance=48' 18218-1155 EGN 22AL (Alasia) distance=48' 18218-1155 EGN 22AM (Alasia) distance=48' 18218-1155 EGN 22AN (Alasia) distance=48' 18218-1155 EGN 22AO (Alasia) distance=48' 18218-1155 EGN 22AP (Alasia) distance=48' 18218-1155 EGN 22AQ (Alasia) distance=48' 18218-1155 EGN 22AR (Alasia) distance=48' 18181-1118 SNA 86 distance=50' 18166-1247 TSN 45 distance=51' 18218-1139 HU 62 distance=54' 18226-1152 BU 1252 distance=60' 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 18187-1206 SNA 90 Aa,Ab 303 0.0
Show 18187-1206 SNA 90 AB 34 3.0
Show 18187-1206 SNA 90 AC 267 7.6
Show 18183-1157 BRT2750 40 1.5 11
Show 18182-1159 SKF1505 3 3.1 11
Show 18181-1215 DBK 1 Aa,Ab 262 0.0 12
Show 18181-1215 TRN 27 AB 40 4.8 12
Show 18181-1215 SS 7 AC 191 14.4 12
Show 18181-1215 SS 7 AD 260 18.1 12
Show 18181-1215 SS 7 AE 217 18.1 12
Show 18181-1215 SS 7 AF 16 30.1 12
Show 18181-1215 SS 7 AG 9 39.4 12
Show 18181-1215 SS 7 AH 268 40.8 12
Show 18181-1215 SS 7 AI 299 45.7 12
Show 18181-1215 SS 7 AJ 258 45.4 12
Show 18181-1215 SS 7 AK 262 48.6 12
Show 18181-1215 SS 7 AL 348 51.8 12
Show 18181-1215 SS 7 AM 255 64.4 12
Show 18181-1215 SS 7 AN 280 71.3 12
Show 18181-1215 SS 7 AO 305 72.1 12
Show 18181-1215 SS 7 AP 285 72.5 12
Show 18181-1215 SS 7 AQ 291 84.9 12
Show 18181-1215 BRT2749 KJ 121 4.3 13
Show 18181-1214 LNV 7 51 4.3 13
Show 18181-1155 TDT 783 67 0.5 14
Show 18175-1206 WRS 12 134 8.8 17
Show 18188-1227 SZA 5 136 5.9 21
Show 18184-1239 TDT 785 252 1.0 34
Show 18164-1214 BRT2747 4 3.9 34
Show 18195-1242 RST4006 243 1.3 37
Show 18202-1137 BRT2751 24 3.9 37
Show 18207-1138 SKF2802 344 5.6 42
Show Alasia 18218-1155 EGN 22 AB 141 3.3 48
Show Alasia 18218-1155 EGN 22 AC 47 3.7 48
Show Alasia 18218-1155 EGN 22 AD 243 5.6 48
Show Alasia 18218-1155 EGN 22 AE 354 5.9 48
Show Alasia 18218-1155 EGN 22 AF 106 7.3 48
Show Alasia 18218-1155 EGN 22 AG 290 8.5 48
Show Alasia 18218-1155 EGN 22 AH 218 8.8 48
Show Alasia 18218-1155 EGN 22 AI 132 8.9 48
Show Alasia 18218-1155 EGN 22 AJ 294 10.4 48
Show Alasia 18218-1155 EGN 22 AK 337 10.6 48
Show Alasia 18218-1155 EGN 22 AL 310 12.2 48
Show Alasia 18218-1155 EGN 22 AM 9 12.8 48
Show Alasia 18218-1155 EGN 22 AN 334 12.9 48
Show Alasia 18218-1155 EGN 22 AO 339 14.2 48
Show Alasia 18218-1155 EGN 22 AP 294 19.6 48
Show Alasia 18218-1155 EGN 22 AQ 309 23.5 48
Show Alasia 18218-1155 EGN 22 AR 313 26.2 48
Show 18181-1118 SNA 86 68 7.2 50
Show 18166-1247 TSN 45 315 15.7 51

 
 
WDS 18187-1206 : COMPONENTS
 
 
  A Ab B
Ab pa=303.8°
sep=0.00"
 
B pa=33.2°
sep=2.98"
pa=33.3°
sep=2.98"
 
C pa=266.7°
sep=7.45"
pa=266.7°
sep=7.45"
pa=252.2°
sep=9.53"
 
 
18187-1206 A
 
 
Coord arcsec 2000 181840.86-120623.3 Mag 6.63 Spectral class O5IV (blue) PmRA 1.00
PmDE -2.0
 
 
18187-1206 Ab
 
 
Coord arcsec 2000 181840.86-120623.3 Mag 7.6 Spectral class O6IV (blue) Calc delta mag 0.2
Calc coord yes
 
 
18187-1206 B
 
 
Coord arcsec 2000 181840.97-120620.8 Mag 13.7 Calc delta mag 6.3 Calc coord yes
 
 
18187-1206 C
 
 
Coord arcsec 2000 181840.35-120623.7 Mag 14 Calc delta mag 6.6 Calc coord yes