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("rescinded by author; omitted from publication") Wor1983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

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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
 
 

virtual eyepiece
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Radius:
Components only
 
 
WDS 21556+3849 (HD 208490) : ALADIN DSS IMAGE @
 
 
Error -22130
Not valid ID.
Error -22130
Not valid ID.
Error -27220
Not valid ID.