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Current system
12289+2555
STFA 21 AB
17 Com


Nearby doubles
15' : 12279+2556
SDK 79

27' : 12271+2603
CVR1434

28' : 12309+2555
LAS 7

32' : 12313+2556
AZC 75

33' : 12268+2609
SLE 897AB

35' : 12266+2611
SLW 721

40' : 12311+2621
GUR 31

50' : 12264+2630
CVR1431

54' : 12282+2502
TOK 912

55' : 12311+2641
LDS4223

55' : 12339+2603
SLE 900AB

57' : 12331+2600
CVR1446

58' : 12251+2530
SLW 719

59' : 12332+2606
LDS3050

62' : 12268+2650
LDS1308AB

63' : 12261+2645
GUR 30

64' : 12250+2520
SLE 894

64' : 12243+2606
YSC 97

64' : 12244+2535
STF1639AB

66' : 12271+2655
UC 2341

71' : 12272+2701
STF1643AB

74' : 12251+2647
LNV 9

76' : 12258+2658
SLE 896

77' : 12317+2701
STF1651

78' : 12282+2712
CVR1437

79' : 12347+2549
LAS 8



Selections
Full WDS
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.

12289+2555 STFA 21 AB (17 Com)

 
 
12h 28m 54.72s +25° 54' 46.4" P.A. 251.00 sep 146.4 mag 5.23,6.64 Sp A0p dist. 72.89 pc (237.77 l.y.)
 
 
Coord 2000 12289+2555 Discov num STFA 21 Comp AB Coord arcsec 2000 12 28 54.72 +25 54 46.4
Date first 1836 Date last 2018 Obs 49
Pa first 251 Pa last 251 P.A. Now (θ) 251°
Sep first 145.3 Sep last 146.42 Sep. Now (ρ) 146.42"
Mag pri 5.23 Mag sec 6.64 delta mag (ΔM) 1.41 Spectral class A0p (white)
Pri motion ra -022 Sec motion ra -020
Pri motion dec -016 Sec motion dec -016
Notes N (See Notes)
rPM=0.074 (< 0.3, Physical double)
This double is physical.
 
 
12289+2555 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 17 Com 82330 12 28 55 +25 54 46 STFA 21 AB 2018 49 251 146.4 5.23 6.64 1.41 <===
Show 82330 12 28 55 +25 54 46 BU 1080 AD 2015 7 270 324.0 5.23 11.63 6.40
Show 82330 12 28 55 +25 54 46 SLE 898 AE 2015 4 270 447.4 5.23 13.60 8.37
Show 82330 12 28 55 +25 54 46 SLE 898 AF 2015 4 145 125.5 5.23 13.92 8.69
Show 82328 12 28 45 +25 53 58 BU 1080 BC 2015 5 180 1.4 6.64 13.70 7.06
Show 82328 12 28 45 +25 53 58 BU 1080 BD 2015 7 284 192.9 6.64 11.63 4.99
Sextuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 17 Com Var name AI Com Constellation Coma Berenices SAO 82330
HIP 60904 Tycho2 1989-03206-1 Gaia DR2 3960724252307181056 HD 108662
HR 4752 GC 17012 ADS 8568 BD BD+26 2354
Flamsteed 17 Comae Berenices Flamsteed name 17 Com Distance 72.89 Distance ly 237.77
 
 
WDS 12289+2555 STFA 21 AB (17 Com) : NOTES
 
 
discov_num notes refcode
STFA 21 AB: A is an Alpha CVn-type variable, AI Com.
B is a spectroscopic binary.
BU 1080 BC: Faint companion was suspected sf on both nights. B__1963b
 
 
REFERENCES
 
 
refcode metd author reference
B__1963b Ma j van den Bos, W.H. 1963AJ.....68..582V
B__1963b AJ 68, 582, 1963
 
 
DISCOVERER
 
 
idgroup discov author
1 BU Burnham, S.W. (BU 1 - 81)
179 SLE Soulie, G.
198 STF Struve, F.G.W.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12289+2555 STFA 21 AB 2002 40 251 146.2 5.23 6.64 A0p N D 122854.72+255446.4
12289+2555 STFA 21 AB 2009 41 251 144.2 5.23 6.64 A0p N D 122854.72+255446.4
12289+2555 STFA 21 AB 2012 42 250 143.5 5.23 6.64 A0p N D 122854.72+255446.4
12289+2555 STFA 21 AB 2018 48 251 146.4 5.23 6.64 A0p N 122854.72+255446.4

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

 
 
WDS 12289+2555 STFA 21 AB (17 Com) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 12289+2555 STFA 21 AB (17 Com) : MEASURES
 
 
No records found.

 
 
WDS 12289+2555 (17 Com) : VIRTUAL EYEPIECE
 
 

12289+2555 STFA 21A mag 5.23 Sp A0p 12289+2555 BU 1080B sep 145.6 P.A. 250.40 mag 6.64 Sp Am 12289+2555 BU 1080C sep 146.0 P.A. 249.90 mag 13.7 12289+2555 BU 1080D sep 291.4 P.A. 269.60 mag 11.63 12289+2555 SLE 898E sep 402.4 P.A. 270.20 mag 13.6 12289+2555 SLE 898F sep 121.6 P.A. 148.10 mag 13.92 virtual eyepiece
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Pass over with the mouse cursor to display the catalog designation.
Radius:
Components only
 
 
WDS 12289+2555 (17 Com) : ALADIN DSS IMAGE @ 12h 28m 54.72s +25° 54' 46.4"
 
 
 
 
WDS 12289+2555 STFA 21 AB (17 Com) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

12289+2555 STFA 21AB distance=0' 12289+2555 BU 1080BC distance=3' 12289+2555 BU 1080BD distance=3' 12279+2556 SDK 79 distance=15' 12271+2603 CVR1434 distance=27' 12309+2555 LAS 7 distance=28' 12313+2556 AZC 75 distance=32' 12268+2609 SLE 897AB distance=33' 12268+2609 UC 2339AC distance=33' 12266+2611 SLW 721 distance=35' 12311+2621 GUR 31 distance=40' 12264+2630 CVR1431 distance=50' 12282+2502 TOK 912 distance=54' 12311+2641 LDS4223 distance=55' 12339+2603 SLE 900AB distance=55' 12339+2603 SLE 900AC distance=55' 12331+2600 CVR1446 distance=57' 12251+2530 SLW 719 distance=58' 12332+2606 LDS3050 distance=59' 12268+2650 LDS1308AB distance=62' 12261+2645 GUR 30 distance=63' 12250+2520 SLE 894 distance=64' 12243+2606 YSC 97 distance=64' 12244+2535 STF1639AB distance=64' 12244+2535 STF1639AC distance=64' 12271+2655 UC 2341 distance=66' 12272+2701 STF1643AB distance=71' 12272+2701 LEP 54AC distance=71' 12251+2647 LNV 9 distance=74' 12258+2658 SLE 896 distance=76' 12317+2701 STF1651 distance=77' 12282+2712 CVR1437 distance=78' 12347+2549 LAS 8 distance=79' 12348+2608 SLW 737 distance=81' 12254+2700 SLE 895 distance=81' 12351+2547 LAS 9 distance=84' 12225+2551 SMR 57DE distance=85' 12315+2437 STF1650 distance=86' 12225+2551 SHJ 143AB distance=87' 12225+2551 SHJ 143AC distance=87' 12225+2551 ARN 6AD distance=87' 12340+2650 COU 595 distance=88' 12341+2453 SDK 95AB distance=94' 12341+2453 SKF1480AC distance=94' 12339+2448 UC 2358 distance=95' 12240+2447 SKF1582 distance=96' 12241+2706 SKF1014 distance=96' 12262+2728 LDS1307AB distance=100' 12262+2728 LDS1307Aa,Ab distance=100' 12305+2732 COU 594 distance=100' 12346+2447 SKF1850 distance=103' 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 12289+2555 STFA 21 AB 251 146.4
Show 12289+2555 SLE 898 AE 270 447.4
Show 12289+2555 SLE 898 AF 145 125.5
Show 12289+2555 BU 1080 AD 270 324.0
Show 12289+2555 BU 1080 BC 180 1.4 3
Show 12289+2555 BU 1080 BD 284 192.9 3
Show 12279+2556 SDK 79 43 2.4 15
Show 12271+2603 CVR1434 336 5.0 27
Show 12309+2555 LAS 7 231 10.3 28
Show 12313+2556 AZC 75 222 11.9 32
Show 12268+2609 SLE 897 AB 126 13.7 33
Show 12268+2609 UC 2339 AC 263 39.3 33
Show 12266+2611 SLW 721 213 168.2 35
Show 12311+2621 GUR 31 22 2.2 40
Show 12264+2630 CVR1431 151 3.0 50
Show 12282+2502 TOK 912 118 0.0 54
Show 12311+2641 LDS4223 271 21.7 55
Show 12339+2603 SLE 900 AB 337 15.8 55
Show 12339+2603 SLE 900 AC 270 25.5 55
Show 12331+2600 CVR1446 351 3.5 57
Show 12251+2530 SLW 719 295 9.6 58
Show 12332+2606 LDS3050 357 37.7 59
Show 12268+2650 LDS1308 AB 215 51.8 62
Show 12261+2645 GUR 30 166 1.1 63
Show 12250+2520 SLE 894 160 11.8 64
Show 12243+2606 YSC 97 228 0.2 64
Show 12244+2535 STF1639 AB 324 1.9 64
Show 12244+2535 STF1639 AC 159 91.4 64
Show 12271+2655 UC 2341 356 30.4 66
Show 12272+2701 STF1643 AB 3 2.8 71
Show 12272+2701 LEP 54 AC 261 221.4 71
Show 12251+2647 LNV 9 7 3.5 74
Show 12258+2658 SLE 896 144 19.4 76
Show 12317+2701 STF1651 215 7.0 77
Show 12282+2712 CVR1437 313 3.4 78
Show 12347+2549 LAS 8 165 7.6 79
Show 12348+2608 SLW 737 338 145.9 81
Show 12254+2700 SLE 895 39 20.9 81
Show 12351+2547 LAS 9 271 9.3 84
Show 12225+2551 SMR 57 DE 166 13.1 85
Show 12315+2437 STF1650 178 16.6 86
Show 12225+2551 SHJ 143 AB 57 37.0 87
Show 12225+2551 SHJ 143 AC 167 65.2 87
Show 12225+2551 ARN 6 AD 132 213.9 87
Show 12340+2650 COU 595 182 1.0 88
Show 12341+2453 SDK 95 AB 343 5.4 94
Show 12341+2453 SKF1480 AC 126 2.3 94
Show 12339+2448 UC 2358 258 41.7 95
Show 12240+2447 SKF1582 249 96.1 96
Show 12241+2706 SKF1014 345 3.4 96
Show 12262+2728 LDS1307 AB 232 47.7 100

 
 
WDS 12289+2555 : COMPONENTS
 
 
  A B C D E
B pa=250.4°
sep=145.55"
 
C pa=249.9°
sep=146.00"
pa=179.6°
sep=1.38"
 
D pa=269.6°
sep=291.43"
pa=286.8°
sep=161.24"
pa=287.3°
sep=161.66"
 
E pa=270.2°
sep=402.44"
pa=280.8°
sep=270.13"
pa=281.1°
sep=270.40"
pa=272.0°
sep=111.08"
 
F pa=148.1°
sep=121.58"
pa=105.1°
sep=208.58"
pa=104.7°
sep=208.21"
pa=105.8°
sep=369.78"
pa=102.7°
sep=478.37"
 
 
12289+2555 A
 
 
Name 17 Com Var name AI Com Coord arcsec 2000 122854.72+255446.4 Mag 5.23
Spectral class A0p (white) PmRA -22.00 PmDE -16.0 SAO 82330
HIP 60904 Tycho2 1989-03206-1 HD 108662 HR 4752
GC 17012 BD BD+26 2354 Flamsteed 17 Comae Berenices Flamsteed name 17 Com
Tycho2
Tycho2 1989-03206-1 Pflag RAmdeg 187.22792710 DEmdeg 25.91284986
PmRA -23.5 PmDE -15.3 E RAmdeg 3 E DEmdeg 4
E pmRA 0.8 E pmDE 0.8 EpRAm 1991.55 EpDEm 1991.45
Num 15 Q RAmdeg 1.3 Q DEmdeg 0.5 Q pmRA 1.4
Q pmDE 0.5 BTmag 5.204 E BTmag 0.014 VTmag 5.231
E VTmag 0.009 Prox 999 TYC T HIP 60904
CCDM RAdeg 187.22798722 DEdeg 25.91288444 EpRA 1990 1.74
EpDE 1990 1.82 E RAdeg 3.4 E DEdeg 3.5 Posflg
Corr 0.2
SAO
SAO 82330 DelFlag RA1950 PmRA1950 -0.0019
DE1950 PmDE1950 -0.024 Vmag 5.4 SpType A0p
Double code Source 70 CatNum 17012 DM BD+26 2354
DMcomp BDsup HD 108662 M HD 0
GC 17012 RA1950rad 3.25685438 DE1950rad 0.45709059 PmRA2000 -0.0019
PmDE2000 -0.02
Hipparcos
Catalog H HIP 60904 Proxy RAhms 12 28 54.72
DEdms +25 54 46.4 Vmag 5.29 VarFlag 1 R Vmag G
RAdeg 187.228 DEdeg 25.9129 AstroRef Plx 12.06
CCDM 12289+2554 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 108662 BD BD+26 2354
CD CP Dm number +26 2354 VIred -0.06
SpType A0p R SpType Coord arcsec 2000 122854.72+255446.4
Hipparcos 2
HIP 60904 Sn 5 So 0 Nc 1
RArad 3.2677448931 DErad 0.4522652176 Plx 13.72 PmRA -21.94
PmDE -15.46 E RArad 0.19 E DErad 0.17 E Plx 0.25
E pmRA 0.27 E pmDE 0.21 Hpmag 5.2424 E Hpmag 0.0018
SHp 0.01 VA 1 BV -0.056 E BV 0.009
VI -0.06
 
 
12289+2555 B
 
 
Coord arcsec 2000 122844.56+255357.5 Coord calc 122844.56+255357.5 Mag 6.64 Spectral class Am (white)
PmRA -22.00 PmDE -17.0 SAO 82328 HIP 60891
Tycho2 1989-03208-1 HD 108651 HR 4751 GC 17007
BD BD+26 2353 Flamsteed 17 Comae Berenices Flamsteed name 17 Com Calc delta mag 1.41
Tycho2
Tycho2 1989-03208-1 Pflag RAmdeg 187.18568379 DEmdeg 25.89931835
PmRA -21.7 PmDE -17.0 E RAmdeg 4 E DEmdeg 4
E pmRA 1.0 E pmDE 1.0 EpRAm 1991.44 EpDEm 1991.52
Num 13 Q RAmdeg 1.5 Q DEmdeg 1.0 Q pmRA 1.5
Q pmDE 1.1 BTmag 6.874 E BTmag 0.015 VTmag 6.638
E VTmag 0.010 Prox 999 TYC T HIP 60891
CCDM RAdeg 187.18573972 DEdeg 25.89935694 EpRA 1990 1.68
EpDE 1990 1.78 E RAdeg 4.4 E DEdeg 4.1 Posflg
Corr 0.4
SAO
SAO 82328 DelFlag RA1950 PmRA1950 -0.0014
DE1950 PmDE1950 -0.025 Vmag 6.7 SpType A3
Double code Source 70 CatNum 17007 DM BD+26 2353
DMcomp BDsup HD 108651 M HD 0
GC 17007 RA1950rad 3.25611523 DE1950rad 0.45685571 PmRA2000 -0.0014
PmDE2000 -0.021
Hipparcos
Catalog H HIP 60891 Proxy RAhms 12 28 44.58
DEdms +25 53 57.7 Vmag 6.63 VarFlag R Vmag G
RAdeg 187.186 DEdeg 25.8994 AstroRef Plx 12.66
CCDM 12289+2554 N CCDM I Nsys 2 Ncomp 1
MultFlag Source Qual M HIP
Theta Rho HD 108651 BD BD+26 2353
CD CP Dm number +26 2353 VIred 0.23
SpType A0p R SpType Coord arcsec 2000 122844.58+255357.7
Hipparcos 2
HIP 60891 Sn 5 So 0 Nc 1
RArad 3.2670075341 DErad 0.4520291367 Plx 14.62 PmRA -20.28
PmDE -16.43 E RArad 0.3 E DErad 0.29 E Plx 0.41
E pmRA 0.42 E pmDE 0.32 Hpmag 6.6831 E Hpmag 0.0008
SHp 0.007 VA 0 BV 0.212 E BV 0.026
VI 0.23
 
 
12289+2555 C
 
 
Coord arcsec 2000 122844.56+255356.1 Mag 13.7 Calc delta mag 8.47 Calc coord yes
 
 
12289+2555 D
 
 
Coord arcsec 2000 122833.12+255444.1 Mag 11.63 PmRA -6.00 PmDE -28.0
Calc delta mag 6.4 Calc coord yes
 
 
12289+2555 E
 
 
Coord arcsec 2000 122824.89+255448.0 Mag 13.6 PmRA -14.00 PmDE 4.0
Calc delta mag 8.37 Calc coord yes
 
 
12289+2555 F
 
 
Coord arcsec 2000 122859.48+255303.2 Mag 13.92 PmRA 4.00 PmDE -11.0
Calc delta mag 8.69 Calc coord yes