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Current system
20454+5735
CIA 1 Aa,Ab


Nearby doubles
28' : 20423+5723
BU 152

31' : 20416+5730
LDS1476AB

35' : 20495+5728
MLB 86

41' : 20500+5751
CVR 232

48' : 20483+5815
MLR 360

49' : 20412+5659
HJ 1570AB

52' : 20470+5825
HDS2961

65' : 20400+5647
OSW 78

66' : 20562+5742
HJ 1595

68' : 20538+5739
OSW 76

69' : 20389+5820
TDT2449

74' : 20540+5711
ES 135AB

77' : 20493+5845
STTA211

83' : 20381+5637
A 745

83' : 20398+5844
MLB 85

84' : 20354+5712
TDT2399

85' : 20443+5610
A 1684

85' : 20356+5808
A 741AB

88' : 20424+5611
VKI 47

88' : 20444+5902
KR 51

88' : 20383+5629
FOX 38

90' : 20472+5607
KR 52

90' : 20404+5615
OSW 73

91' : 20454+5906
ES 2700

92' : 20553+5651
A 752

92' : 20406+5858
HJ 1569



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Binary Systems
Triple Systems
Quadruple Systems
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Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20454+5735 CIA 1 Aa,Ab

 
 
20h 45m 21.12s +57° 34' 47.0" P.A. 105.00 sep 0.1 mag 5.20,5.50 Sp F8IV-V+F9 dist. 27.29 pc (89.02 l.y.)
 
 
Coord 2000 20454+5735 Discov num CIA   1 Comp Aa,Ab Coord arcsec 2000 20 45 21.12 +57 34 47.0
Date first 2006 Date last 2010 Obs 19
Pa first 92 Pa last 104.9 P.A. Now (θ) 104.9°
Sep first 0.0 Sep last 0.055 Sep. Now (ρ) 0.055"
Mag pri 5.20 Mag sec 5.50 delta mag (ΔM) 0.3 Spectral class F8IV-V+F9 (yellow-white)
Pri motion ra -062 Sec motion ra
Pri motion dec -236 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20454+5735 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 32862 20 45 21 +57 34 47 CIA 1 Aa,Ab 2010 19 105 0.1 5.20 5.50 0.30 Y <===
Show Ups1 Cep 32862 20 45 21 +57 34 47 ENG 76 AB 2004 17 146 48.4 4.57 9.86 5.29
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cepheus SAO 32862 HIP 102431 Tycho2 3959-01685-1
Gaia DR2 2190258605988673536 HD 198084 HR 7955 GC 28956
GL Wo 9706 BD BD+57 2240 Bayer Upsilon 1 Cephei Bayer name Ups1 Cep
FK5 782 Distance 27.29 Distance ly 89.02 Bayer greek υ1 Cep
 
 
ORBITAL ELEMENTS
 
 
Period (P)523.4192d± 0.101 Periastron (T)50206.004m (1996.337y)± 0.609 Semi-major axis (a)0.065a± 0.001
Eccentricity (e)0.551± 0.004 Inclination (i)24.53°± 3.13 Longitude of periastron (ω)68.86°± 0.76
Node (Ω)325.21°± 1.05 Notesn ReferenceCIA2010
Equinox Last observation2009 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000-01-01 219.8 0.091
2001-01-01 176.4 0.080
2002-01-01 331.3 0.036
2003-01-01 233.4 0.086
2004-01-01 191.4 0.089
2005-01-01 95.6 0.033
2006-01-01 249.9 0.076
2007-01-01 204.3 0.093
2008-01-01 149.3 0.059
2009-01-01 272.8 0.061
2010-01-01 216.8 0.092
2011-01-01 172.3 0.077
2012-01-01 314.3 0.041
2013-01-01 230.1 0.087
2014-01-01 188.1 0.088
2015-01-01 68.2 0.028
2016-01-01 245.6 0.079
2017-01-01 201.3 0.092
2018-01-01 141.3 0.054
2019-01-01 266.5 0.065
2020-01-01 213.8 0.093
2021-01-01 167.9 0.074
2022-01-01 301.2 0.047
2023-01-01 226.8 0.089
2024-01-01 184.7 0.086
2025-01-01 33.9 0.027
2026-01-01 241.6 0.081
2027-01-01 198.3 0.092
2028-01-01 131.5 0.048
2029-01-01 260.8 0.069
2030-01-01 210.9 0.093


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


 
  


wds20454%2B5735c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 20454+5735 CIA 1 Aa,Ab : NOTES
 
 
discov_num notes refcode
ENG 76 AB: A is an SB. B is BD+57@2241.
Optical pair, based on study of relative motion of the components
using the method of apparent motion parameters. Kiy2008
CIA 1 Aa,Ab: Farrington et al. (2010) present two possible orbits for this CIA2010
F8IV-V + F9IV-V pair. One is based on speckle plus K'-band CHARA Array
separated fringe packet observations, the other is a combined solution
including spectroscopic data. The resulting orbital parallax is
39.8+/-4.8 mas, the masses 1.071+/-0.037 and 1.047+/-0.037 Msun.
The aperture and method, 8m and speckle, are set to give the
resolution capability of this technique, which is less than classical
interferometric methods.
Aa,Ab: Orbit determined by fitting revised Hipparcos intermediate
astrometric data. Derived component masses are 0.47 +/- 0.22 and
0.45 +/- 0.21 Msun. Ren2010
Aa,Ab: Malkov et al. (2012) derive dynamical, photometric, and
spectroscopic masses 2.72 +/- 0.16, 2.39, and 2.38 Msun, respectively. Mlk2012
ENG 76 AB: Rectilinear solution by Hurowitz et al. (2014). USN2014b
 
 
REFERENCES
 
 
refcode metd author reference
CIA2010 Kf j Farrington, C.D., ten Brummelaar, T.A., Mason, B.D., Hartkopf, W.I., McAlister, 2010AJ....139.2308F
CIA2010 +orb H.A., Raghavan, D., Turner, N.H., Sturmann, L., Sturmann, J., & Ridgway, S.T.
CIA2010 AJ 139, 2308, 2010
Kiy2008 - Kiyaeva, O.V., Kiselev, A.A. & Izmailov, I.S. 2008SvAL...32..405K
Kiy2008 SvAL 34, 405, 2008
Mlk2012 not - Malkov, O.Yu., Tamazian, V.S., Docobo, J.A., & Chulkov, D.A. 2012A&A...546A..69M
Mlk2012 A&A 546, A69, 2012
Ren2010 orb - Ren, S. & Fu, Y. 2010AJ....139.1975R
Ren2010 AJ 139, 1975, 2010
USN2014b lin - Hurowitz, J.L., Hartkopf, W.I., & Mason, B.D. 2014IAUDS.183....1H
USN2014b Inf. Circ. 183, 1, 2014
 
 
DISCOVERER
 
 
idgroup discov author
1 ENG changed from EN to ENG and that for Engelhardt from ENG to ENH. This has led to
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20454+5735 CIA 1 Aa,Ab 2009 18 166 0.1 5.20 5.50 NO 204521.20+573449.1
20454+5735 CIA 1 Aa,Ab 2010 19 105 0.1 5.20 5.50 NOD 204521.20+573449.1

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

 
 
WDS 20454+5735 CIA 1 Aa,Ab : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 20454+5735 CIA 1 Aa,Ab : MEASURES
 
 
No records found.

 
 
WDS 20454+5735 : VIRTUAL EYEPIECE
 
 

20454+5735 ENG 76A mag 4.57 Sp F8IV 20454+5735 CIA 1Ab mag 5.5 Sp V 20454+5735 ENG 76B sep 42.8 P.A. 160.30 mag 9.86 Sp V 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 20454+5735 : ALADIN DSS IMAGE @ 20h 45m 21.12s +57° 34' 47.0"
 
 
 
 
WDS 20454+5735 CIA 1 Aa,Ab : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

20454+5735 CIA 1Aa,Ab distance=0' 20423+5723 BU 152 distance=28' 20416+5730 LDS1476AB distance=31' 20416+5730 OSO 130AC distance=31' 20495+5728 MLB 86 distance=35' 20500+5751 CVR 232 distance=41' 20483+5815 MLR 360 distance=48' 20412+5659 HJ 1570AB distance=49' 20412+5659 VBS 32AC distance=49' 20470+5825 HDS2961 distance=52' 20400+5647 OSW 78 distance=65' 20562+5742 HJ 1595 distance=66' 20538+5739 OSW 76 distance=68' 20389+5820 TDT2449 distance=69' 20540+5711 ES 135AB distance=74' 20540+5711 ES 135AC distance=74' 20493+5845 STTA211 distance=77' 20381+5637 A 745 distance=83' 20398+5844 MLB 85 distance=83' 20354+5712 TDT2399 distance=84' 20443+5610 A 1684 distance=85' 20356+5808 A 741AB distance=85' 20356+5808 A 741AC distance=85' 20424+5611 VKI 47 distance=88' 20444+5902 KR 51 distance=88' 20383+5629 FOX 38 distance=88' 20472+5607 KR 52 distance=90' 20404+5615 OSW 73 distance=90' 20454+5906 ES 2700 distance=91' 20553+5651 A 752 distance=92' 20406+5858 HJ 1569 distance=92' 20422+5606 OSW 74 distance=93' 20343+5707 STI2541 distance=94' 20567+5656 A 755 distance=100' 20567+5618 ROE 89 distance=103' 20330+5712 A 739 distance=103' 20475+5553 HJ 1580 distance=104' 20351+5624 HJ 1551 distance=110' 20352+5622 HJ 1552 distance=111' 20509+5918 MLR 240 distance=112' 20342+5622 HJ 1546 distance=117' 20309+5747 TDT2333 distance=117' 20312+5714 A 872 distance=117' 20599+5714 ES 136 distance=119' 20577+5849 YSC 117Da,Db distance=120' 20311+5814 LDS1474 distance=121' 20312+5653 RAO 22 distance=123' 20365+5557 VBS 30AB distance=123' 20365+5557 HJ 1556AC distance=123' 20365+5557 VBS 30AD distance=123' 20537+5918 A 751 distance=123' 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 20454+5735 CIA 1 Aa,Ab 105 0.1
Show 20454+5735 ENG 76 AB 146 48.4
Show 20423+5723 BU 152 82 1.2 28
Show 20416+5730 LDS1476 AB 267 11.6 31
Show 20416+5730 OSO 130 AC 233 23.6 31
Show 20495+5728 MLB 86 149 4.6 35
Show 20500+5751 CVR 232 319 112.1 41
Show 20483+5815 MLR 360 295 0.2 48
Show 20412+5659 HJ 1570 AB 79 14.0 49
Show 20412+5659 VBS 32 AC 345 15.4 49
Show 20470+5825 HDS2961 39 0.1 52
Show 20400+5647 OSW 78 233 186.1 65
Show 20562+5742 HJ 1595 313 11.6 66
Show 20538+5739 OSW 76 326 145.5 68
Show 20389+5820 TDT2449 91 0.7 69
Show 20540+5711 ES 135 AB 199 7.1 74
Show 20540+5711 ES 135 AC 115 71.7 74
Show 20493+5845 STTA211 268 94.9 77
Show 20381+5637 A 745 313 2.4 83
Show 20398+5844 MLB 85 134 6.2 83
Show 20354+5712 TDT2399 4 0.5 84
Show 20443+5610 A 1684 141 2.1 85
Show 20356+5808 A 741 AB 157 1.3 85
Show 20356+5808 A 741 AC 211 19.8 85
Show 20424+5611 VKI 47 340 2.3 88
Show 20444+5902 KR 51 181 1.4 88
Show 20383+5629 FOX 38 301 5.4 88
Show 20472+5607 KR 52 64 4.6 90
Show 20404+5615 OSW 73 250 188.6 90
Show 20454+5906 ES 2700 297 15.5 91
Show 20553+5651 A 752 8 1.2 92
Show 20406+5858 HJ 1569 306 3.9 92
Show 20422+5606 OSW 74 88 127.2 93
Show 20343+5707 STI2541 205 10.6 94
Show 20567+5656 A 755 189 0.1 100
Show 20567+5618 ROE 89 241 5.5 103
Show 20330+5712 A 739 195 4.6 103
Show 20475+5553 HJ 1580 245 10.9 104
Show 20351+5624 HJ 1551 225 42.2 110
Show 20352+5622 HJ 1552 234 21.3 111
Show 20509+5918 MLR 240 22 0.2 112
Show 20342+5622 HJ 1546 246 17.4 117
Show 20309+5747 TDT2333 138 2.4 117
Show 20312+5714 A 872 178 0.2 117
Show 20599+5714 ES 136 159 4.2 119
Show 20577+5849 YSC 117 Da,Db 341 0.1 120
Show 20311+5814 LDS1474 209 10.2 121
Show 20312+5653 RAO 22 152 0.2 123
Show 20365+5557 VBS 30 AB 141 4.6 123
Show 20365+5557 HJ 1556 AC 222 6.6 123
Show 20365+5557 VBS 30 AD 97 29.6 123

 
 
WDS 20454+5735 : COMPONENTS
 
 
  A Ab
Ab pa=116.4°
sep=0.03"
 
B pa=160.3°
sep=42.75"
pa=160.4°
sep=42.73"
 
 
20454+5735 A
 
 
Name Ups1 Cep Coord arcsec 2000 204521.12+573447.0 Mag 4.57 Spectral class F8IV (yellow-white)
PmRA -62.00 PmDE -236.0 SAO 32862 HIP 102431
Tycho2 3959-01685-1 HD 198084 HR 7955 GC 28956
BD BD+57 2240 Bayer Upsilon 1 Bayer name Ups1 FK5 782
Tycho2
Tycho2 3959-01685-1 Pflag RAmdeg 311.33803256 DEmdeg 57.57972720
PmRA -63.8 PmDE -234.9 E RAmdeg 3 E DEmdeg 3
E pmRA 0.7 E pmDE 0.8 EpRAm 1991.25 EpDEm 1991.29
Num 18 Q RAmdeg 1.7 Q DEmdeg 1.7 Q pmRA 1.6
Q pmDE 1.8 BTmag 5.156 E BTmag 0.014 VTmag 4.571
E VTmag 0.009 Prox 516 TYC T HIP 102431
CCDM RAdeg 311.33831000 DEdeg 57.58027833 EpRA 1990 1.59
EpDE 1990 1.55 E RAdeg 3.3 E DEdeg 3.3 Posflg
Corr 0.1
SAO
SAO 32862 DelFlag RA1950 PmRA1950 -0.0085
DE1950 PmDE1950 -0.232 Vmag 4.6 SpType G0
Double code Source 74 CatNum 782 DM BD+57 2240
DMcomp BDsup HD 198084 M HD 0
GC 28956 RA1950rad 5.42845604 DE1950rad 1.00181472 PmRA2000 -0.0079
PmDE2000 -0.235
Hipparcos
Catalog H HIP 102431 Proxy RAhms 20 45 21.20
DEdms +57 34 49.1 Vmag 4.52 VarFlag R Vmag G
RAdeg 311.338 DEdeg 57.5803 AstroRef Plx 36.87
CCDM 20454+5735 N CCDM I Nsys 1 Ncomp 1
MultFlag G Source Qual M HIP
Theta Rho HD 198084 BD BD+57 2240
CD CP Dm number +57 2240 VIred 0.58
SpType F8IV-V R SpType Coord arcsec 2000 204521.20+573449.1
Hipparcos 2
HIP 102431 Sn 7 So 1 Nc 1
RArad 5.4338787568 DErad 1.0049657852 Plx 36.64 PmRA -62.32
PmDE -236 E RArad 0.44 E DErad 0.41 E Plx 0.48
E pmRA 0.49 E pmDE 0.46 Hpmag 4.6297 E Hpmag 0.0006
SHp 0.004 VA 0 BV 0.535 E BV 0.005
VI 0.58
CCDM
Ccdm 20454+5735 RComp Comp A Note1
Note2 Discov num DRAs -2.89 DDEs -12.9
R dRAs 10 Year Theta Rho
Obs 2 Vmag 4.6 Sp G0 PmNote *
PmRA -69 PmDE -232 Dm number +57 2240 Cat1 BD
Name2 +57 1392 Cat2 AGK2/3 HD 198084 M HD
ADS BDS M ADS BDS N IDS IDS 20429N5713A
HIC 102431
 
 
20454+5735 Ab
 
 
Coord arcsec 2000 204521.12+573447.0 Mag 5.5 Spectral class V Calc delta mag 0.3
Calc coord yes
 
 
20454+5735 B
 
 
Coord arcsec 2000 204522.91+573406.7 Mag 9.86 Spectral class V PmRA 3.00
PmDE 19.0 Calc delta mag 4.66 Calc coord yes
CCDM
Ccdm 20454+5735 RComp Comp B Note1
Note2 Discov num BUP DRAs 0.47 DDEs -55.0
R dRAs 10 Year 1918 Theta 161 Rho 66.4
Obs 5 Vmag 10.3 Sp PmNote *
PmRA -9 PmDE 16 Dm number +57 2241 Cat1 BD
Name2 +57 1393 Cat2 AGK2/3 HD M HD
ADS BDS M ADS BDS N IDS IDS 20429N5713B
HIC