stampa
Login

Never registered to Stelle Doppie? It's like a Ferrari without wheels. Register now to releveal the full potential!


Search



Actions
Advanced Search
Go to Simbad
New report
New measure
Login


Computed Lists
Populars
Latest Populars
Doubles in session


Current system
20089+6205
STF 2652
HD 191940


Nearby doubles
16' : 20109+6211
LDS2789

17' : 20097+6220
ES 1853

19' : 20116+6205
LDS2791

20' : 20067+6214
TOR 22

22' : 20080+6225
BVD 335

24' : 20081+6227
STI 946

25' : 20073+6143
ES 1852AB

36' : 20111+6133
KPP3355

39' : 20043+6225
STI 943

41' : 20145+6152
LDS2793

43' : 20030+6215
STI 942

43' : 20129+6236
STI 954

50' : 20019+6207
TDT1923

53' : 20085+6113
TDT2015

55' : 20014+6217
MLR 13

58' : 20082+6109
MLR 502

74' : 20193+6152
STI 965

76' : 20196+6215
GUL 2

77' : 20193+6142
TDT2165

80' : 20194+6135
STI 966

81' : 20185+6122
LDS1469

82' : 20198+6235
LDS1470

83' : 20086+6328
STI 948

83' : 20001+6110
KPP4180

84' : 20207+6157
STI 968

85' : 20202+6236
HU 958



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.

20089+6205 STF 2652 (HD 191940)

 
 
20h 08m 56.80s +62° 04' 36.0" P.A. 211.00 sep 0.3 mag 7.29,7.78 Sp A0V dist. 252.53 pc (823.75 l.y.)
 
 
Coord 2000 20089+6205 Discov num STF2652 Comp Coord arcsec 2000 20 08 56.80 +62 04 36.0
Date first 1831 Date last 2009 Obs 76
Pa first 285 Pa last 211.2 P.A. Now (θ) 211.2°
Sep first 0.5 Sep last 0.313 Sep. Now (ρ) 0.313"
Mag pri 7.29 Mag sec 7.78 delta mag (ΔM) 0.49 Spectral class A0V (white)
Pri motion ra +012 Sec motion ra
Pri motion dec -019 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 191940 Constellation Draco SAO 18732 HIP 99257
Tycho2 4236-01106-1 Gaia DR2 2237927966972481792 HD 191940 GC 27995
ADS 13449 BD BD+61 1975 Distance 252.53 Distance ly 823.75
 
 
ORBITAL ELEMENTS
 
 
Period (P)495y Periastron (T)2185y Semi-major axis (a)0.495a
Eccentricity (e)0.72 Inclination (i)111.2° Longitude of periastron (ω)85.8°
Node (Ω)141.3° Notes ReferenceZir2014a
Equinox2000 Last observation2005 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 213.1 0.307
2001 212.6 0.308
2002 212.1 0.308
2003 211.6 0.308
2004 211.2 0.308
2005 210.7 0.309
2006 210.2 0.309
2007 209.8 0.309
2008 209.3 0.310
2009 208.8 0.310
2010 208.4 0.310
2011 207.9 0.311
2012 207.4 0.311
2013 207.0 0.311
2014 206.5 0.312
2015 206.1 0.312
2016 205.6 0.313
2017 205.1 0.313
2018 204.7 0.313
2019 204.2 0.314
2020 203.8 0.314
2021 203.3 0.315
2022 202.9 0.315
2023 202.4 0.315
2024 202.0 0.316
2025 201.5 0.316
2026 201.1 0.317
2027 200.6 0.317
2028 200.2 0.318
2029 199.8 0.318
2030 199.3 0.319
2031 198.9 0.319
2032 198.4 0.320
2033 198.0 0.320
2034 197.6 0.321
2035 197.1 0.321
2036 196.7 0.322
2037 196.3 0.322
2038 195.8 0.323
2039 195.4 0.323
2040 195.0 0.324
2041 194.5 0.324
2042 194.1 0.325
2043 193.7 0.325
2044 193.3 0.326
2045 192.9 0.326
2046 192.4 0.327
2047 192.0 0.327
2048 191.6 0.328
2049 191.2 0.328
2050 190.8 0.329


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds20089%2B6205a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic