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Current system
21161+2951
BWL 56 AC


Nearby doubles
5' : 21162+2948
TDT2872

9' : 21156+2957
TDT2864

9' : 21167+2955
TDT2878

13' : 21167+3001
MLB1091

14' : 21169+3001
MLB 538AB

24' : 21162+2928
J 1784

29' : 21166+3018
J 3131AB

38' : 21150+2917
GRV 438

42' : 21176+2915
COU 835AB

43' : 21129+2944
MLB 667

47' : 21129+3014
BUP 227AB

50' : 21149+3037
BRT 287

51' : 21155+3042
KPP 488

52' : 21182+3035
HO 154AB

52' : 21144+2905
STF2779AB

54' : 21162+2858
TDT2873

55' : 21159+2858
HDS3025

57' : 21118+2943
HAU 27

58' : 21185+3037
FYM 538AB

61' : 21153+3051
GRV 439

63' : 21180+3049
COU1183

64' : 21145+3052
TDT2850

65' : 21153+2848
MLB 488

71' : 21142+3058
COU 834

73' : 21115+3033
ALD 5

73' : 21109+2925
BAG 29



Selections
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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.

21161+2951 BWL 56 AC

 
 
21h 16m 05.81s +29° 51' 50.8" P.A. 77.00 sep 3.4 mag 7.86,20.10 Sp M4.0
 
 
Coord 2000 21161+2951 Discov num BWL  56 Comp AC Coord arcsec 2000 21 16 05.81 +29 51 50.8
Date first 2011 Date last 2012 Obs 2
Pa first 76 Pa last 76.5 P.A. Now (θ) 76.5°
Sep first 3.6 Sep last 3.355 Sep. Now (ρ) 3.355"
Mag pri 7.86 Mag sec 20.10 delta mag (ΔM) 12.24 Spectral class M4.0 (red)
Pri motion ra +206 Sec motion ra
Pri motion dec +035 Sec motion dec
Notes N U K (See Notes, Proper motion indicates non-physical, 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
This double is not physical.
 
 
21161+2951 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21 16 06 +29 51 51 BWL 56 Aa,Ab 2018 5 163 0.1 8.50 8.80 0.30
Show 21 16 06 +29 51 51 LDS 1053 AB 2016 12 259 26.0 12.89 13.83 0.94
Show 21 16 06 +29 51 51 BWL 56 AC 2012 2 77 3.4 7.86 20.10 12.24 <===
Show 21 16 06 +29 51 51 BWL 56 AD 2012 2 200 2.6 7.86 18.40 10.54
Show 21 16 06 +29 51 51 BWL 56 AE 2012 2 226 4.4 7.86 19.40 11.54
Show 21 16 04 +29 51 46 BWL 56 BF 2011 2 233 3.5 8.66 23.10 14.44
Septuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Gaia DR2 1851868127125091840
 
 
WDS 21161+2951 BWL 56 AC : NOTES
 
 
discov_num notes refcode
LDS1053 NLTT 50902/50901 Chm2004
Luyten measure flipped around the E/W line: pa 282 -> 258. Luy1969
 
 
REFERENCES
 
 
refcode metd author reference
Chm2004 E - Chaname, J. & Gould, A. 2004ApJ...601..289C
Chm2004 ApJ 601, 289, 2004
Chm2004 (Photometry, coordinates, and astrometry from rNLTT. Astrometry from early
Chm2004 versions of 2MASS and UCAC, with date given only as "circa 2000". Measures
Chm2004 identical to discovery observations - predominantly close pairs - were assumed
Chm2004 not new observations, so not included in WDS. Similar concerns when primary and
Chm2004 secondary magnitudes or proper motions were the same.)
Luy1969 Po - Luyten, W.J. 1969PMMin..21....1L
Luy1969 Univ. Minnesota Proper Motion Survey #21, 1969
Luy1969 (CPM pairs found by comparison of Palomar 48-inch Schmidt plates. First and second
Luy1969 plates epochs were 1950-1955 and 1963-1967, so a default mean date of 1960 was
Luy1969 assigned to all measures for LDS 859 and later not having more precisely known
Luy1969 dates. LDS 833 - 858 were measured from Bruce PM plates - see note to Luy1941
Luy1969 reference.)
 
 
DISCOVERER
 
 
idgroup discov author
1 BWL Bowler, B.P., Liu, M.C., Shkolnik, E.L., Dupuy, T.J., Cieza, L.A., Kraus, A.L., &
1 BWL Tamura, M.
10 BWL Bowler, B.P., Shkolnik, E.L., Liu, M.C., Schlieder, J.E., Mann, A.W., Dupuy, T.J.,
10 BWL Hinkley, S., Crepp, J., Johnson, J., Howard, A., Flagg, L., Weinberger, A., et al.
11 BWL Bowler, B.P., Dupuy, T.J., Endl, M., Cochran, W.D., MacQueen, P.J., Fulton, B.J.,
11 BWL Petigura, E.A., Howard, A.W., Hirsch, L., Kratter, K.M., Crepp, J.R., Biller, B.A.,
11 BWL Johnson, M.C. & Wittenmyer, R.A.
13 LDS Luyten p.m. catalog (from additional DD list)
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21161+2951 BWL 56 AC 2012 2 77 3.4 7.86 20.10 M4.0 U K 211605.81+295150.8

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

 
 
WDS 21161+2951 BWL 56 AC : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21161+2951 BWL 56 AC : MEASURES
 
 
No records found.

 
 
WDS 21161+2951 : VIRTUAL EYEPIECE
 
 

21161+2951 LDS1053A mag 12.89 Sp M3.5V 21161+2951 BWL 56Ab sep 0.1 P.A. 165.20 mag 8.8 21161+2951 BWL 56B sep 26.7 P.A. 259.60 mag 8.66 Sp M3.3 21161+2951 BWL 56C sep 2.9 P.A. 74.50 mag 20.1 21161+2951 BWL 56D sep 2.5 P.A. 197.10 mag 18.4 21161+2951 BWL 56E sep 4.1 P.A. 222.00 mag 19.4 21161+2951 BWL 56F sep 29.5 P.A. 256.60 mag 23.1 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 21161+2951 : ALADIN DSS IMAGE @ 21h 16m 05.81s +29° 51' 50.8"
 
 
 
 
WDS 21161+2951 BWL 56 AC : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21161+2951 BWL 56AC distance=0' 21161+2951 BWL 56BF distance=1' 21162+2948 TDT2872 distance=5' 21156+2957 TDT2864 distance=9' 21167+2955 TDT2878 distance=9' 21167+3001 MLB1091 distance=13' 21169+3001 MLB 538AB distance=14' 21169+3001 DAM 227AC distance=14' 21162+2928 J 1784 distance=24' 21166+3018 J 3131BC distance=29' 21166+3018 J 3131AB distance=29' 21150+2917 GRV 438 distance=38' 21176+2915 COU 835AB distance=42' 21176+2915 COU 835AC distance=42' 21129+2944 MLB 667 distance=43' 21129+3014 BAS 7Aa,Ab distance=47' 21129+3014 BUP 227AB distance=47' 21129+3014 BUP 227AC distance=47' 21129+3014 BUP 227AD distance=47' 21129+3014 FYM 141AE distance=47' 21129+3014 FYM 141AF distance=47' 21129+3014 FYM 141AG distance=47' 21149+3037 BRT 287 distance=50' 21182+3035 NOV 1XL distance=51' 21182+3035 NOV 1XQ distance=51' 21182+3035 NOV 1XY distance=51' 21182+3035 NOV 1XZ distance=51' 21182+3035 POP 228NK distance=51' 21155+3042 KPP 488 distance=51' 21182+3035 HO 154AB distance=52' 21182+3035 POP 228AC distance=52' 21182+3035 NOV 1AD distance=52' 21182+3035 POP 228AN distance=52' 21182+3035 NOV 1AX distance=52' 21144+2905 STF2779AB distance=52' 21144+2905 STF2779AC distance=52' 21162+2858 TDT2873 distance=54' 21159+2858 HDS3025 distance=55' 21118+2943 HAU 27 distance=57' 21185+3037 FYM 538BC distance=58' 21185+3037 FYM 538AB distance=58' 21153+3051 GRV 439 distance=61' 21180+3049 COU1183 distance=63' 21145+3052 TDT2850 distance=64' 21153+2848 MLB 488 distance=65' 21142+3058 COU 834 distance=71' 21115+3033 ALD 5 distance=73' 21109+2925 BAG 29 distance=73' 21117+3038 J 1235 distance=73' 21176+2841 MLB 489AB distance=74' 21176+2841 MLB 489AC distance=74' 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 21161+2951 LDS1053 AB 259 26.0
Show 21161+2951 BWL 56 Aa,Ab 163 0.1
Show 21161+2951 BWL 56 AC 77 3.4
Show 21161+2951 BWL 56 AD 200 2.6
Show 21161+2951 BWL 56 AE 226 4.4
Show 21161+2951 BWL 56 BF 233 3.5 1
Show 21162+2948 TDT2872 163 0.7 5
Show 21156+2957 TDT2864 100 0.9 9
Show 21167+2955 TDT2878 10 0.6 9
Show 21167+3001 MLB1091 170 10.4 13
Show 21169+3001 MLB 538 AB 310 3.2 14
Show 21169+3001 DAM 227 AC 26 8.2 14
Show 21162+2928 J 1784 338 5.0 24
Show 21166+3018 J 3131 BC 229 5.5 29
Show 21166+3018 J 3131 AB 253 24.6 29
Show 21150+2917 GRV 438 8 15.2 38
Show 21176+2915 COU 835 AB 238 0.4 42
Show 21176+2915 COU 835 AC 247 12.3 42
Show 21129+2944 MLB 667 30 2.4 43
Show 21129+3014 BAS 7 Aa,Ab 246 0.0 47
Show 21129+3014 BUP 227 AB 205 65.2 47
Show 21129+3014 BUP 227 AC 300 91.5 47
Show 21129+3014 BUP 227 AD 63 105.3 47
Show 21129+3014 FYM 141 AE 76 42.8 47
Show 21129+3014 FYM 141 AF 267 63.6 47
Show 21129+3014 FYM 141 AG 97 70.7 47
Show 21149+3037 BRT 287 197 6.2 50
Show 21182+3035 NOV 1 XL 89 32.2 51
Show 21182+3035 NOV 1 XQ 134 29.2 51
Show 21182+3035 NOV 1 XY 206 14.1 51
Show 21182+3035 NOV 1 XZ 57 18.3 51
Show 21182+3035 POP 228 NK 64 6.5 51
Show 21155+3042 KPP 488 119 3.6 51
Show 21182+3035 HO 154 AB 211 3.6 52
Show 21182+3035 POP 228 AC 139 9.0 52
Show 21182+3035 NOV 1 AD 162 21.4 52
Show 21182+3035 POP 228 AN 262 64.2 52
Show 21182+3035 NOV 1 AX 142 186.7 52
Show 21144+2905 STF2779 AB 164 15.1 52
Show 21144+2905 STF2779 AC 71 67.7 52
Show 21162+2858 TDT2873 277 0.8 54
Show 21159+2858 HDS3025 46 0.2 55
Show 21118+2943 HAU 27 297 50.0 57
Show 21185+3037 FYM 538 BC 218 5.7 58
Show 21185+3037 FYM 538 AB 192 7.0 58
Show 21153+3051 GRV 439 127 21.5 61
Show 21180+3049 COU1183 16 0.3 63
Show 21145+3052 TDT2850 173 2.7 64
Show 21153+2848 MLB 488 306 11.4 65
Show 21142+3058 COU 834 77 7.9 71
Show 21115+3033 ALD 5 153 3.7 73

 
 
WDS 21161+2951 : COMPONENTS
 
 
  A Ab B C D E
Ab pa=165.2°
sep=0.06"
 
B pa=259.6°
sep=26.71"
pa=259.8°
sep=26.72"
 
C pa=74.5°
sep=2.94"
pa=73.4°
sep=2.94"
pa=79.1°
sep=29.64"
 
D pa=197.1°
sep=2.55"
pa=197.8°
sep=2.51"
pa=84.7°
sep=25.64"
pa=228.0°
sep=4.82"
 
E pa=222.0°
sep=4.11"
pa=222.7°
sep=4.08"
pa=85.8°
sep=23.59"
pa=235.5°
sep=6.77"
pa=253.0°
sep=2.09"
 
F pa=256.6°
sep=29.49"
pa=256.7°
sep=29.49"
pa=229.4°
sep=3.16"
pa=256.4°
sep=32.42"
pa=261.0°
sep=28.28"
pa=261.7°
sep=26.21"
 
 
21161+2951 A
 
 
Coord arcsec 2000 211605.81+295150.8 Mag 12.89 Spectral class M3.5V (red) PmRA 206.00
PmDE 35.0
 
 
21161+2951 Ab
 
 
Coord arcsec 2000 211605.81+295150.7 Mag 8.8 Calc delta mag 0.3 Calc coord yes
 
 
21161+2951 B
 
 
Coord arcsec 2000 211603.79+295146.0 Coord calc 211603.79+295146.0 Mag 8.66 Spectral class M3.3 (red)
PmRA 220.00 PmDE 46.0 Calc delta mag 0.16
 
 
21161+2951 C
 
 
Coord arcsec 2000 211606.03+295151.6 Mag 20.1 Calc delta mag 11.6 Calc coord yes
 
 
21161+2951 D
 
 
Coord arcsec 2000 211605.75+295148.4 Mag 18.4 Calc delta mag 9.9 Calc coord yes
 
 
21161+2951 E
 
 
Coord arcsec 2000 211605.60+295147.7 Mag 19.4 Calc delta mag 10.9 Calc coord yes
 
 
21161+2951 F
 
 
Coord arcsec 2000 211603.61+295143.9 Mag 23.1 Calc delta mag 14.6 Calc coord yes