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Doubles in session


Current system
12272+2701
STF 1643 AB
HD 108421


Nearby doubles
7' : 12271+2655
UC 2341

14' : 12268+2650
LDS1308AB

17' : 12282+2712
CVR1437

20' : 12258+2658
SLE 896

23' : 12261+2645
GUR 30

25' : 12254+2700
SLE 895

30' : 12262+2728
LDS1307AB

32' : 12251+2647
LNV 9

34' : 12264+2630
CVR1431

42' : 12241+2706
SKF1014

52' : 12266+2611
SLW 721

53' : 12268+2609
SLE 897AB

54' : 12305+2732
COU 594

57' : 12311+2641
LDS4223

59' : 12271+2603
CVR1434

61' : 12317+2701
STF1651

66' : 12311+2621
GUR 31

66' : 12279+2556
SDK 79

68' : 12243+2606
YSC 97

71' : 12289+2555
STFA 21AB

75' : 12269+2816
SMR 58

76' : 12223+2737
RAO 276

78' : 12298+2812
LDS4218

82' : 12218+2738
LDS1299

83' : 12309+2555
LAS 7

85' : 12313+2556
AZC 75



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.

12272+2701 STF 1643 AB (HD 108421)

 
 
12h 27m 13.72s +27° 01' 29.6" P.A. 3.00 sep 2.8 mag 9.03,9.45 Sp K2 dist. 27.21 pc (88.76 l.y.)
 
 
Coord 2000 12272+2701 Discov num STF1643 Comp AB Coord arcsec 2000 12 27 13.72 +27 01 29.6
Date first 1830 Date last 2020 Obs 253
Pa first 71 Pa last 3.1 P.A. Now (θ) 3.1°
Sep first 2.0 Sep last 2.76 Sep. Now (ρ) 2.76"
Mag pri 9.03 Mag sec 9.45 delta mag (ΔM) 0.42 Spectral class K2 (yellow-orange)
Pri motion ra +094 Sec motion ra +084
Pri motion dec -248 Sec motion dec -242
Notes N O V (See Notes, Orbital solution, Proper motion indicates physical)
rPM=0.044 (< 0.3, Physical double)
This double is physical.
 
 
12272+2701 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 108421 82315 12 27 14 +27 01 30 STF 1643 AB 2020 253 3 2.8 9.03 9.45 0.42 Y <===
Show 82315 12 27 14 +27 01 30 LEP 54 AC 2015 4 261 221.4 9.03 14.78 5.75
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 108421 Constellation Coma Berenices SAO 82315 HIP 60759
Tycho2 1991-00865-1 Gaia DR2 4008897567571892480 HD 108421 GC 16971
ADS 8553 GL NN 3725A BD BD+27 2135 Distance 27.21
Distance ly 88.76
 
 
ORBITAL ELEMENTS
 
 
Period (P)549.41y Periastron (T)2193.49y Semi-major axis (a)2.695a
Eccentricity (e)0.58 Inclination (i)115.2° Longitude of periastron (ω)286.1°
Node (Ω)155.3° Notesn ReferenceOle2003b
Equinox2000 Last observation2000 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 7.3 2.645
2001 7.1 2.650
2002 6.8 2.655
2003 6.6 2.660
2004 6.4 2.665
2005 6.1 2.670
2006 5.9 2.675
2007 5.7 2.680
2008 5.5 2.684
2009 5.2 2.689
2010 5.0 2.694
2011 4.8 2.698
2012 4.5 2.702
2013 4.3 2.707
2014 4.1 2.711
2015 3.9 2.715
2016 3.7 2.719
2017 3.4 2.723
2018 3.2 2.727
2019 3.0 2.731
2020 2.8 2.735
2021 2.5 2.739
2022 2.3 2.742
2023 2.1 2.746
2024 1.9 2.749
2025 1.7 2.753
2026 1.4 2.756
2027 1.2 2.759
2028 1.0 2.762
2029 0.8 2.765
2030 0.6 2.768


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.


 
  


wds12272%2B2701b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 12272+2701 STF 1643 AB (HD 108421) : NOTES
 
 
discov_num notes refcode
STF1643 A premature orbit has been computed. Omega and omega in Hopmann (1964) Hop1964b
have been flipped in the orbit catalog to better match observations.
Data appear equally well fit by rectilinear solution - see catalog.
 
 
REFERENCES
 
 
refcode metd author reference
Hop1964b orb - Hopmann, J. 1964AnWie..26....1H
Hop1964b Ann. Sternw. Wien 26, #1, 1964
Ole2003b orb - Olevic, D. & Cvetkovic, Z. 2003IAUDS.150....1O
Ole2003b Inf. Circ. 150, 1, 2003
 
 
DISCOVERER
 
 
idgroup discov author
1 LEP Lepine, S., Wallace, D., Shara, M., Moffat, A., & Niemela, V.
14 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
12272+2701 STF1643 AB 2010 218 5 2.6 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2012 220 5 2.6 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2013 228 5 2.8 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2014 226 4 2.7 9.03 9.45 K2 NCD 122713.72+270129.6
12272+2701 STF1643 AB 2015 239 4 2.7 9.03 9.45 K2 NO 122713.72+270129.6
12272+2701 STF1643 AB 2017 241 3 2.7 9.03 9.45 K2 NO 122713.72+270129.6
12272+2701 STF1643 AB 2018 248 4 2.7 9.03 9.45 K2 NO 122713.72+270129.6
12272+2701 STF1643 AB 2019 251 3 2.8 9.03 9.45 K2 NO 122713.72+270129.6
12272+2701 STF1643 AB 2020 253 3 2.8 9.03 9.45 K2 NO V 122713.72+270129.6

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

 
 
WDS 12272+2701 STF 1643 AB (HD 108421) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 12272+2701 STF 1643 AB (HD 108421) : MEASURES
 
 
No records found.

 
 
WDS 12272+2701 (HD 108421) : VIRTUAL EYEPIECE
 
 

12272+2701 STF1643A mag 9.03 Sp K2 12272+2701 STF1643B sep 2.8 P.A. 2.80 mag 9.45 12272+2701 LEP 54C sep 197.9 P.A. 259.70 mag 14.78 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 12272+2701 (HD 108421) : ALADIN DSS IMAGE @ 12h 27m 13.72s +27° 01' 29.6"
 
 
 
 
WDS 12272+2701 STF 1643 AB (HD 108421) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

12272+2701 STF1643AB distance=0' 12271+2655 UC 2341 distance=7' 12268+2650 LDS1308AB distance=14' 12282+2712 CVR1437 distance=17' 12258+2658 SLE 896 distance=20' 12261+2645 GUR 30 distance=23' 12254+2700 SLE 895 distance=25' 12262+2728 LDS1307AB distance=30' 12262+2728 LDS1307Aa,Ab distance=30' 12251+2647 LNV 9 distance=32' 12264+2630 CVR1431 distance=34' 12241+2706 SKF1014 distance=42' 12266+2611 SLW 721 distance=52' 12268+2609 SLE 897AB distance=53' 12268+2609 UC 2339AC distance=53' 12305+2732 COU 594 distance=54' 12311+2641 LDS4223 distance=57' 12271+2603 CVR1434 distance=59' 12317+2701 STF1651 distance=61' 12311+2621 GUR 31 distance=66' 12279+2556 SDK 79 distance=66' 12243+2606 YSC 97 distance=68' 12289+2555 STFA 21AB distance=71' 12289+2555 SLE 898AE distance=71' 12289+2555 SLE 898AF distance=71' 12289+2555 BU 1080AD distance=71' 12289+2555 BU 1080BC distance=71' 12289+2555 BU 1080BD distance=71' 12269+2816 SMR 58 distance=75' 12223+2737 RAO 276 distance=76' 12298+2812 LDS4218 distance=78' 12218+2738 LDS1299 distance=82' 12309+2555 LAS 7 distance=83' 12313+2556 AZC 75 distance=85' 12283+2828 LDS4213 distance=88' 12207+2703 STF1633 distance=88' 12340+2650 COU 595 distance=92' 12244+2535 STF1639AB distance=95' 12244+2535 STF1639AC distance=95' 12225+2551 SHJ 143AB distance=96' 12225+2551 SHJ 143AC distance=96' 12225+2551 ARN 6AD distance=96' 12225+2551 SMR 57DE distance=96' 12287+2836 LDS1312 distance=96' 12203+2637 PIN 6 distance=96' 12251+2530 SLW 719 distance=97' 12339+2603 SLE 900AB distance=97' 12339+2603 SLE 900AC distance=97' 12258+2836 LEP 132 distance=97' 12332+2606 LDS3050 distance=98' 12331+2600 CVR1446 distance=100' 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 12272+2701 STF1643 AB 3 2.8
Show 12272+2701 LEP 54 AC 261 221.4
Show 12271+2655 UC 2341 356 30.4 7
Show 12268+2650 LDS1308 AB 215 51.8 14
Show 12282+2712 CVR1437 313 3.4 17
Show 12258+2658 SLE 896 144 19.4 20
Show 12261+2645 GUR 30 166 1.1 23
Show 12254+2700 SLE 895 39 20.9 25
Show 12262+2728 LDS1307 AB 232 47.7 30
Show 12262+2728 LDS1307 Aa,Ab 69 2.5 30
Show 12251+2647 LNV 9 7 3.5 32
Show 12264+2630 CVR1431 151 3.0 34
Show 12241+2706 SKF1014 345 3.4 42
Show 12266+2611 SLW 721 213 168.2 52
Show 12268+2609 SLE 897 AB 126 13.7 53
Show 12268+2609 UC 2339 AC 263 39.3 53
Show 12305+2732 COU 594 133 2.8 54
Show 12311+2641 LDS4223 271 21.7 57
Show 12271+2603 CVR1434 336 5.0 59
Show 12317+2701 STF1651 215 7.0 61
Show 12311+2621 GUR 31 22 2.2 66
Show 12279+2556 SDK 79 43 2.4 66
Show 12243+2606 YSC 97 228 0.2 68
Show 12289+2555 STFA 21 AB 251 146.4 71
Show 12289+2555 SLE 898 AE 270 447.4 71
Show 12289+2555 SLE 898 AF 145 125.5 71
Show 12289+2555 BU 1080 AD 270 324.0 71
Show 12289+2555 BU 1080 BC 180 1.4 71
Show 12289+2555 BU 1080 BD 284 192.9 71
Show 12269+2816 SMR 58 207 16.1 75
Show 12223+2737 RAO 276 281 2.0 76
Show 12298+2812 LDS4218 79 154.3 78
Show 12218+2738 LDS1299 207 12.9 82
Show 12309+2555 LAS 7 231 10.3 83
Show 12313+2556 AZC 75 222 11.9 85
Show 12283+2828 LDS4213 80 2.0 88
Show 12207+2703 STF1633 245 9.0 88
Show 12340+2650 COU 595 182 1.0 92
Show 12244+2535 STF1639 AB 324 1.9 95
Show 12244+2535 STF1639 AC 159 91.4 95
Show 12225+2551 SHJ 143 AB 57 37.0 96
Show 12225+2551 SHJ 143 AC 167 65.2 96
Show 12225+2551 ARN 6 AD 132 213.9 96
Show 12225+2551 SMR 57 DE 166 13.1 96
Show 12287+2836 LDS1312 297 125.0 96
Show 12203+2637 PIN 6 187 42.7 96
Show 12251+2530 SLW 719 295 9.6 97
Show 12339+2603 SLE 900 AB 337 15.8 97
Show 12339+2603 SLE 900 AC 270 25.5 97
Show 12258+2836 LEP 132 235 16.0 97
Show 12332+2606 LDS3050 357 37.7 98

 
 
WDS 12272+2701 : COMPONENTS
 
 
  A B
B pa=2.8°
sep=2.76"
 
C pa=259.7°
sep=197.87"
pa=258.9°
sep=198.52"
 
 
12272+2701 A
 
 
Name HD 108421 Coord arcsec 2000 122713.72+270129.6 Mag 9.03 Spectral class K2 (yellow-orange)
PmRA 94.00 PmDE -248.0 SAO 82315 HIP 60759
Tycho2 1991-00865-1 HD 108421 GC 16971 BD BD+27 2135
Tycho2
Tycho2 1991-00865-1 Pflag P RAmdeg 186.80716044 DEmdeg 27.02489161
PmRA 80.6 PmDE -247.8 E RAmdeg 73 E DEmdeg 84
E pmRA 2.4 E pmDE 2.4 EpRAm 1979.68 EpDEm 1974.86
Num 4 Q RAmdeg 0.3 Q DEmdeg 0.7 Q pmRA 0.3
Q pmDE 0.7 BTmag 10.239 E BTmag 0.033 VTmag 9.025
E VTmag 0.018 Prox 26 TYC T HIP 60759
CCDM A RAdeg 186.80691194 DEdeg 27.02525333 EpRA 1990 1.71
EpDE 1990 1.72 E RAdeg 47.6 E DEdeg 60.8 Posflg D
Corr 0.1
SAO
SAO 82315 DelFlag RA1950 PmRA1950 0.0063
DE1950 PmDE1950 -0.24 Vmag 8.6 SpType K2
Double code Source 70 CatNum 16971 DM BD+27 2135
DMcomp BDsup HD 108421 M HD 0
GC 16971 RA1950rad 3.24947609 DE1950rad 0.47656326 PmRA2000 0.0063
PmDE2000 -0.236
Hipparcos
Catalog H HIP 60759 Proxy H RAhms 12 27 13.65
DEdms +27 01 31.0 Vmag 8.24 VarFlag R Vmag H
RAdeg 186.807 DEdeg 27.0253 AstroRef A Plx 36.32
CCDM 12272+2701 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 10 Rho 2.616 HD 108421 BD BD+27 2135
CD CP Dm number +27 2135 VIred 1.09
SpType K2V R SpType Coord arcsec 2000 122713.65+270131.0
Hipparcos 2
HIP 60759 Sn 15 So 3 Nc 2
RArad 3.2603953862 DErad 0.471680197 Plx 36.75 PmRA 93.52
PmDE -249.31 E RArad 0.79 E DErad 0.55 E Plx 0.9
E pmRA 1.35 E pmDE 0.71 Hpmag 8.38 E Hpmag 0.0019
SHp 0.013 VA 0 BV 1.042 E BV 0.005
VI 1.09
CCDM
Ccdm 12272+2701 RComp Comp A Note1
Note2 Discov num DRAs 1.75 DDEs 29.5
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.2 Sp K2 PmNote *
PmRA 98 PmDE -252 Dm number +27 2135 Cat1 BD
Name2 +27 1226 Cat2 AGK2/3 HD 108421 M HD
ADS BDS A 8553 M ADS BDS N IDS IDS 12222N2735A
HIC 60759
 
 
12272+2701 B
 
 
Coord arcsec 2000 122713.73+270132.4 Mag 9.45 PmRA 84.00 PmDE -242.0
HIP 60759 Tycho2 1991-00865-2 Calc delta mag 0.42 Calc coord yes
Tycho2
Tycho2 1991-00865-2 Pflag P RAmdeg 186.80716044 DEmdeg 27.02489161
PmRA 80.6 PmDE -247.8 E RAmdeg 73 E DEmdeg 84
E pmRA 2.4 E pmDE 2.4 EpRAm 1979.68 EpDEm 1974.86
Num 4 Q RAmdeg 0.3 Q DEmdeg 0.7 Q pmRA 0.3
Q pmDE 0.7 BTmag 10.834 E BTmag 0.049 VTmag 9.450
E VTmag 0.023 Prox 26 TYC T HIP 60759
CCDM B RAdeg 186.80704694 DEdeg 27.02597250 EpRA 1990 1.67
EpDE 1990 1.71 E RAdeg 78.7 E DEdeg 94.2 Posflg D
Corr 0.2
Hipparcos
Catalog H HIP 60759 Proxy H RAhms 12 27 13.65
DEdms +27 01 31.0 Vmag 8.24 VarFlag R Vmag H
RAdeg 186.807 DEdeg 27.0253 AstroRef A Plx 36.32
CCDM 12272+2701 N CCDM I Nsys 1 Ncomp 2
MultFlag C Source Qual A M HIP AB
Theta 10 Rho 2.616 HD 108421 BD BD+27 2135
CD CP Dm number +27 2135 VIred 1.09
SpType K2V R SpType Coord arcsec 2000 122713.65+270131.0
Hipparcos 2
HIP 60759 Sn 15 So 3 Nc 2
RArad 3.2603953862 DErad 0.471680197 Plx 36.75 PmRA 93.52
PmDE -249.31 E RArad 0.79 E DErad 0.55 E Plx 0.9
E pmRA 1.35 E pmDE 0.71 Hpmag 8.38 E Hpmag 0.0019
SHp 0.013 VA 0 BV 1.042 E BV 0.005
VI 1.09
CCDM
Ccdm 12272+2701 RComp Comp B Note1 *
Note2 Discov num STF1643 DRAs DDEs
R dRAs Year 1960 Theta 018 Rho 2.3
Obs 99 Vmag 9.5 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A 8553 M ADS BDS N IDS IDS 12222N2735B
HIC 60759
 
 
12272+2701 C
 
 
Coord arcsec 2000 122659.15+270054.2 Mag 14.78 PmRA 89.00 PmDE -250.0
Calc delta mag 5.75 Calc coord yes