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Current system
21556+3849
A 1449
HD 208490


Nearby doubles
7' : 21550+3851
TDT3237

10' : 21550+3843
KU 62

20' : 21571+3858
SEI1545

34' : 21576+3912
TDT3260

34' : 21529+3901
SEI1542

36' : 21526+3841
MLB 991

37' : 21547+3814
TOK 638AB

38' : 21586+3900
COU1824

42' : 21520+3857
COU1823

43' : 21591+3900
MLB 789

43' : 21590+3839
COU1339

49' : 21520+3826
HDS3114

51' : 21522+3817
TDT3205

55' : 22001+3859
TDT3284

57' : 21559+3752
ES 2524

59' : 21506+3847
MLB 962

62' : 21509+3918
MLB 788

65' : 21585+3944
TDT3268

66' : 21599+3930
ALI1168

66' : 21542+3953
HJ 1703

67' : 21589+3755
A 1450

67' : 22011+3832
RAO 471

70' : 21513+3938
TDT3196

70' : 22015+3854
MLB 992

70' : 22011+3915
A 1451AB

71' : 21504+3927
HO 170



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Neglected List I
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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

21556+3849 A 1449 (HD 208490)

 
 
21h 55m 33.91s +38° 48' 59.8" P.A. 50.00 sep 0.3 mag 9.60,9.60 Sp G0 dist. 222.22 pc (724.88 l.y.)
 
 
Coord 2000 21556+3849 Discov num A  1449 Comp Coord arcsec 2000 21 55 33.91 +38 48 59.8
Date first 1906 Date last 2011 Obs 32
Pa first 24 Pa last 50 P.A. Now (θ) 225°
Sep first 0.4 Sep last 0.271 Sep. Now (ρ) 0.343"
Mag pri 9.60 Mag sec 9.60 delta mag (ΔM) 0 Spectral class G0 (yellow)
Pri motion ra +046 Sec motion ra
Pri motion dec -025 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 208490 Constellation Cygnus SAO 71845 HIP 108231
Tycho2 3185-01617-1 HD 208490 ADS 15454 BD BD+38 4638
Distance 222.22 Distance ly 724.88
 
 
ORBITAL ELEMENTS
 
 
Period (P)161.57y Periastron (T)1978.15y Semi-major axis (a)0.241a
Eccentricity (e)0.709 Inclination (i)152.8° Longitude of periastron (ω)351.1°
Node (Ω)17.5° Notesn ReferenceHrt2014b
Equinox2000 Last observation2008 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 248.5 0.222
2001 246.9 0.229
2002 245.4 0.235
2003 244.0 0.242
2004 242.6 0.248
2005 241.3 0.255
2006 240.1 0.261
2007 238.9 0.267
2008 237.8 0.272
2009 236.8 0.278
2010 235.7 0.283
2011 234.7 0.289
2012 233.8 0.294
2013 232.9 0.299
2014 232.0 0.304
2015 231.1 0.309
2016 230.3 0.314
2017 229.4 0.318
2018 228.7 0.323
2019 227.9 0.327
2020 227.1 0.331
2021 226.4 0.335
2022 225.7 0.339
2023 225.0 0.343
2024 224.3 0.347
2025 223.6 0.350
2026 223.0 0.354
2027 222.3 0.357
2028 221.7 0.360
2029 221.1 0.364
2030 220.5 0.367


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


 
  


wds21556%2B3849b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
WDS 21556+3849 A 1449 (HD 208490) : NOTES
 
 
discov_num notes refcode
A 1449 Baize (1982) orbit rejected from Fourth Orbit Catalog Baz1982
("rescinded by author; omitted from publication") Wor1983
 
 
REFERENCES
 
 
refcode metd author reference
Baz1982 orb - Baize, P. 1982IAUDS..88....1B
Baz1982 Inf. Circ. 88, 1, 1982
Hrt2014b orb - Hartkopf, W.I. & Mason, B.D. 2014IAUDS.184....1H
Hrt2014b Inf. Circ. 184, 1, 2014
Wor1983 - Worley, C.E. & Heintz, W.D. 1983PUSNO..24g...1W
Wor1983 Pub. USNO 24, Pt. 7, 1983 (Fourth Orbit Catalog)
 
 
DISCOVERER
 
 
idgroup discov author
1 A Aitken, R.G.
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21556+3849 A 1449 1996 26 73 0.2 9.60 9.60 G0 NO 215533.91+384859.8
21556+3849 A 1449 2006 27 238 0.3 9.60 9.60 G0 NO 215533.91+384859.8
21556+3849 A 1449 2008 29 58 0.3 9.60 9.60 G0 NO 215533.91+384859.8
21556+3849 A 1449 2010 31 55 0.3 9.60 9.60 G0 NO 215533.91+384859.8
21556+3849 A 1449 2011 32 50 0.3 9.60 9.60 G0 NO 215533.91+384859.8

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

 
 
WDS 21556+3849 A 1449 (HD 208490) : VISUAL OBSERVATIONS REPORTS
 
 
No records found.


 
 
WDS 21556+3849 A 1449 (HD 208490) : MEASURES
 
 
No records found.

 
 
WDS 21556+3849 (HD 208490) : VIRTUAL EYEPIECE
 
 

21556+3849 A 1449A mag 9.6 Sp G0 21556+3849 A 1449B sep 0.2 P.A. 42.90 mag 9.6 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 21556+3849 (HD 208490) : ALADIN DSS IMAGE @ 21h 55m 33.91s +38° 48' 59.8"
 
 
 
 
WDS 21556+3849 A 1449 (HD 208490) : NEIGHBORHOODS
 
 
FoV:
Limit:
Primaries only

21556+3849 A 1449 distance=1' 21550+3851 TDT3237 distance=7' 21550+3843 KU 62 distance=10' 21571+3858 SEI1545 distance=20' 21576+3912 TDT3260 distance=34' 21529+3901 SEI1542 distance=34' 21526+3841 MLB 991 distance=36' 21547+3814 TOK 638AB distance=37' 21586+3900 COU1824 distance=38' 21520+3857 COU1823 distance=42' 21591+3900 MLB 789 distance=43' 21590+3839 COU1339 distance=43' 21520+3826 HDS3114 distance=49' 21522+3817 TDT3205 distance=51' 22001+3859 TDT3284 distance=55' 21559+3752 ES 2524 distance=57' 21506+3847 MLB 962 distance=59' 21509+3918 MLB 788 distance=62' 21585+3944 TDT3268 distance=65' 21599+3930 ALI1168 distance=66' 21542+3953 HJ 1703 distance=66' 21589+3755 A 1450 distance=67' 22011+3832 RAO 471 distance=67' 21513+3938 TDT3196 distance=70' 22015+3854 MLB 992 distance=70' 22011+3915 A 1451AB distance=70' 22011+3915 SEI1549AB,C distance=70' 21504+3927 HO 170 distance=71' 21512+3941 TDT3192 distance=73' 21492+3849 TDT3176 distance=75' 21596+3947 TDT3278 distance=75' 21569+3735 BKO 905AB distance=76' 21569+3735 BKO 905AC distance=76' 21569+3735 BKO 905AD distance=76' 21588+3745 ES 2527 distance=76' 22016+3816 TDT3296 distance=79' 21576+4004 SEI1546 distance=79' 21599+3949 GRV 527 distance=79' 22019+3919 SEI1550 distance=80' 21493+3816 A 1448 distance=81' 21490+3912 TDT3173 distance=81' 21573+3732 ES 2526BC distance=81' 21573+3732 ES 2526AB distance=81' 21573+3732 ABH 155AD distance=81' 21573+3732 ABH 155AE distance=81' 21573+3732 ABH 155AF distance=81' 21573+3732 ABH 155AG distance=81' 21573+3732 ABH 155AH distance=81' 21573+3732 ABH 155AI distance=81' 21573+3732 ABH 155AJ distance=81' 21505+3944 ES 211AB distance=81' 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 21556+3849 A 1449 50 0.3 1
Show 21550+3851 TDT3237 115 1.7 7
Show 21550+3843 KU 62 54 1.6 10
Show 21571+3858 SEI1545 324 5.8 20
Show 21576+3912 TDT3260 304 0.5 34
Show 21529+3901 SEI1542 172 29.7 34
Show 21526+3841 MLB 991 4.4 36
Show 21547+3814 TOK 638 AB 65 999.9 37
Show 21586+3900 COU1824 300 0.6 38
Show 21520+3857 COU1823 13 1.0 42
Show 21591+3900 MLB 789 359 9.8 43
Show 21590+3839 COU1339 261 1.4 43
Show 21520+3826 HDS3114 119 0.1 49
Show 21522+3817 TDT3205 142 0.5 51
Show 22001+3859 TDT3284 233 1.3 55
Show 21559+3752 ES 2524 277 6.2 57
Show 21506+3847 MLB 962 322 4.4 59
Show 21509+3918 MLB 788 52 4.9 62
Show 21585+3944 TDT3268 318 0.5 65
Show 21599+3930 ALI1168 206 13.6 66
Show 21542+3953 HJ 1703 82 8.9 66
Show 21589+3755 A 1450 190 4.1 67
Show 22011+3832 RAO 471 330 1.3 67
Show 21513+3938 TDT3196 234 2.1 70
Show 22015+3854 MLB 992 60 6.9 70
Show 22011+3915 A 1451 AB 13 0.2 70
Show 22011+3915 SEI1549 AB,C 22 36.1 70
Show 21504+3927 HO 170 256 0.3 71
Show 21512+3941 TDT3192 118 0.5 73
Show 21492+3849 TDT3176 1 2.3 75
Show 21596+3947 TDT3278 338 0.4 75
Show 21569+3735 BKO 905 AB 316 6.3 76
Show 21569+3735 BKO 905 AC 36 6.8 76
Show 21569+3735 BKO 905 AD 33 17.8 76
Show 21588+3745 ES 2527 322 8.2 76
Show 22016+3816 TDT3296 209 0.6 79
Show 21576+4004 SEI1546 212 29.0 79
Show 21599+3949 GRV 527 313 58.5 79
Show 22019+3919 SEI1550 222 22.9 80
Show 21493+3816 A 1448 331 4.7 81
Show 21490+3912 TDT3173 137 0.6 81
Show 21573+3732 ES 2526 BC 183 5.8 81
Show 21573+3732 ES 2526 AB 269 17.9 81
Show 21573+3732 ABH 155 AD 259 99.1 81
Show 21573+3732 ABH 155 AE 307 93.5 81
Show 21573+3732 ABH 155 AF 359 46.4 81
Show 21573+3732 ABH 155 AG 22 50.2 81
Show 21573+3732 ABH 155 AH 65 105.4 81
Show 21573+3732 ABH 155 AI 146 63.7 81
Show 21573+3732 ABH 155 AJ 161 35.4 81
Show 21505+3944 ES 211 AB 197 2.5 81

 
 
WDS 21556+3849 : COMPONENTS
 
 
  A
B pa=42.9°
sep=0.24"
 
 
21556+3849 A
 
 
Componente originario normalizzato AB Name HD 208490 Coord arcsec 2000 215533.91+384859.8 Mag 9.6
Spectral class G0 (yellow) PmRA 46.00 PmDE -25.0 SAO 71845
HIP 108231 Tycho2 3185-01617-1 HD 208490 BD BD+38 4638
Tycho2
Tycho2 3185-01617-1 Pflag RAmdeg 328.89145046 DEmdeg 38.81657460
PmRA 51.4 PmDE -14.8 E RAmdeg 8 E DEmdeg 7
E pmRA 1.3 E pmDE 1.3 EpRAm 1990.70 EpDEm 1991.16
Num 9 Q RAmdeg 1.5 Q DEmdeg 0.6 Q pmRA 1.5
Q pmDE 0.6 BTmag 9.844 E BTmag 0.018 VTmag 9.279
E VTmag 0.013 Prox 999 TYC T HIP 108231
CCDM RAdeg 328.89129306 DEdeg 38.81660889 EpRA 1990 1.43
EpDE 1990 1.66 E RAdeg 7.9 E DEdeg 6.7 Posflg
Corr 0.3
SAO
SAO 71845 DelFlag RA1950 PmRA1950 0.0039
DE1950 PmDE1950 -0.01 Vmag 8.9 SpType G0
Double code Source 5 CatNum 2274 DM BD+38 4638
DMcomp BDsup HD 208490 M HD 0
GC RA1950rad 5.73106563 DE1950rad 0.67333436 PmRA2000 0.0041
PmDE2000 -0.013
Hipparcos
Catalog H HIP 108231 Proxy RAhms 21 55 33.91
DEdms +38 48 59.8 Vmag 9.24 VarFlag R Vmag H
RAdeg 328.891 DEdeg 38.8166 AstroRef Plx 5.75
CCDM 21556+3849 N CCDM I Nsys 1 Ncomp 1
MultFlag Source Qual S M HIP
Theta Rho HD 208490 BD BD+38 4638
CD CP Dm number +38 4638 VIred 0.62
SpType G0 R SpType Coord arcsec 2000 215533.91+384859.8
Hipparcos 2
HIP 108231 Sn 5 So 0 Nc 1
RArad 5.7402359076 DErad 0.6774776514 Plx 4.5 PmRA 52.2
PmDE -13.81 E RArad 0.72 E DErad 0.83 E Plx 1.34
E pmRA 0.88 E pmDE 1 Hpmag 9.3535 E Hpmag 0.0017
SHp 0.025 VA 0 BV 0.513 E BV 0.017
VI 0.59
CCDM
Ccdm 21556+3849 RComp Comp A Note1
Note2 Discov num DRAs -2.03 DDEs -1.2
R dRAs 10 Year Theta Rho
Obs 2 Vmag 9.6 Sp G0 PmNote *
PmRA 53 PmDE -28 Dm number +38 4638 Cat1 BD
Name2 +38 2274 Cat2 AGK2/3 HD 208490 M HD
ADS BDS A15454 M ADS BDS N IDS IDS 21514N3821A
HIC 108231
 
 
21556+3849 B
 
 
Componente originario normalizzato AB Coord arcsec 2000 215533.92+384860.0 Mag 9.6 Calc coord yes
CCDM
Ccdm 21556+3849 RComp Comp B Note1 *
Note2 Discov num A 1449 DRAs DDEs
R dRAs Year 1958 Theta 340 Rho 0.2
Obs 12 Vmag 9.6 Sp PmNote
PmRA PmDE Dm number Cat1
Name2 Cat2 HD M HD
ADS BDS A15454 M ADS BDS N IDS IDS 21514N3821B
HIC 108231