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Doubles in session


Current system
01108+6747
HDS 155
HD 6840


Nearby doubles
24' : 01083+6729
HU 1021AB

43' : 01172+6810
HJ 1075

47' : 01189+6756
TDS1839

52' : 01066+6833
HDS 142

55' : 01149+6658
LDS3247

57' : 01151+6656
LDS3249

57' : 01207+6752
MLR 294

60' : 01107+6847
H 4 16

63' : 01167+6841
HU 1025AB

65' : 00599+6732
TDS1709

68' : 01003+6717
HJ 1061

70' : 01180+6844
LDS3259

70' : 01023+6838
TDS1736

73' : 00587+6726
HU 1019

73' : 00581+6742
BLL 2AB

76' : 01237+6806
SKF 978AB

86' : 01198+6856
MLR 293

88' : 01259+6808
BU 1101AB

89' : 00568+6828
MLR 290

94' : 01256+6830
TDS1874

94' : 01274+6751
LDS3281

94' : 01269+6814
LDS3280

98' : 01030+6914
LAF 24AB

99' : 01280+6733
HU 1028

101' : 00548+6831
KPP2614

101' : 00561+6653
SKF2560



Selections
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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.

01108+6747 HDS 155 (HD 6840)

 
 
01h 10m 50.74s +67° 46' 48.2" P.A. 174.00 sep 0.1 mag 7.22,7.68 Sp G0IV+G0IV dist. 54.64 pc (178.24 l.y.)
 
 
Coord 2000 01108+6747 Discov num HDS 155 Comp Coord arcsec 2000 01 10 50.74 +67 46 48.2
Date first 1991 Date last 2013 Obs 27
Pa first 165 Pa last 174 P.A. Now (θ) 284.9°
Sep first 0.1 Sep last 0.133 Sep. Now (ρ) 0.029"
Mag pri 7.22 Mag sec 7.68 delta mag (ΔM) 0.46 Spectral class G0IV+G0IV (yellow/yellow)
Pri motion ra +250 Sec motion ra
Pri motion dec +024 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 6840 Constellation Cassiopeia SAO 11614 HIP 5531
Tycho2 4296-01443-1 Gaia DR2 526537396786294784 HD 6840 GC 1409
BD BD+67 98 Distance 54.64 Distance ly 178.24
 
 
ORBITAL ELEMENTS
 
 
Period (P)7.454y± 0.004 Periastron (T)1995.493y± 0.01 Semi-major axis (a)0.082a± 0.001
Eccentricity (e)0.744± 0.003 Inclination (i)50.849°± 0.6 Longitude of periastron (ω)214.597°± 0.2
Node (Ω)152.306°± 0.5 Notesn ReferenceMdz2022
Equinox Last observation Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 182.8 0.118
2001 195.3 0.091
2002 223.2 0.052
2003 19.8 0.016
2004 149.1 0.085
2005 161.8 0.120
2006 170.4 0.131
2007 178.6 0.125
2008 188.9 0.105
2009 206.6 0.072
2010 270.6 0.031
2011 136.6 0.057
2012 157.1 0.108
2013 166.7 0.128
2014 174.8 0.129
2015 183.8 0.116
2016 196.8 0.088
2017 228.1 0.048
2018 69.9 0.017
2019 150.7 0.090
2020 162.7 0.122
2021 171.1 0.131
2022 179.4 0.124
2023 190.0 0.103
2024 209.2 0.068
2025 284.7 0.029
2026 140.1 0.064
2027 158.1 0.111
2028 167.4 0.129
2029 175.5 0.129
2030 184.7 0.114
2031 198.5 0.085
2032 234.0 0.044
2033 101.5 0.024
2034 152.2 0.094
2035 163.5 0.123
2036 171.9 0.131
2037 180.3 0.122
2038 191.3 0.100
2039 212.1 0.064
2040 300.9 0.027
2041 142.9 0.070
2042 159.1 0.113
2043 168.2 0.129
2044 176.3 0.128
2045 185.7 0.112
2046 200.3 0.082
2047 241.0 0.041
2048 117.3 0.033
2049 153.6 0.098
2050 164.4 0.125


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds01108%2B6747c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic