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Doubles in session


Current system
00258+1025
HDS 57
HD 2157


Nearby doubles
23' : 00253+1047
SHN 50

32' : 00251+1055
KPP4414

32' : 00271+1051
PLQ 6

41' : 00240+0955
A 1805

48' : 00229+1007
DVG 10

51' : 00236+0947
KUI 3

55' : 00244+1115
UC 359

57' : 00277+0936
GIC 9

57' : 00222+1007
DVG 9

59' : 00287+1106
KPP1086

73' : 00222+1114
HEI 301

73' : 00291+1119
A 805AB

76' : 00283+1131
BPM 13AB

79' : 00304+1105
KPP3132

80' : 00209+1059
BU 1093

83' : 00310+0957
CVR 326

97' : 00298+1142
KPP 56

99' : 00290+1152
CVR 324

102' : 00246+1205
CVR 318

102' : 00204+0921
HEI 422

108' : 00324+1113
CVR 329

113' : 00218+0849
CVR 11

126' : 00183+0927
UC 349

126' : 00174+1002
A 1804

128' : 00236+1229
J 583

128' : 00180+0931
AG 1



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.

00258+1025 HDS 57 (HD 2157)

 
 
00h 25m 49.78s +10° 25' 24.1" P.A. 296.00 sep 0.1 mag 9.71,10.71 Sp G0 dist. 110.13 pc (359.24 l.y.)
 
 
Coord 2000 00258+1025 Discov num HDS  57 Comp Coord arcsec 2000 00 25 49.78 +10 25 24.1
Date first 1991 Date last 2023 Obs 16
Pa first 157 Pa last 296 P.A. Now (θ) 339.9°
Sep first 0.2 Sep last 0.06 Sep. Now (ρ) 0.056"
Mag pri 9.71 Mag sec 10.71 delta mag (ΔM) 1 Spectral class G0 (yellow)
Pri motion ra +066 Sec motion ra
Pri motion dec +049 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 2157 Constellation Pisces SAO 91889 HIP 2035
Tycho2 0599-00603-1 Gaia DR2 2754101912605043584 HD 2157 BD BD+09 41
Distance 110.13 Distance ly 359.24
 
 
ORBITAL ELEMENTS
 
 
Period (P)96.7y Periastron (T)2019.26y Semi-major axis (a)0.179a
Eccentricity (e)0.527 Inclination (i)131.8° Longitude of periastron (ω)47.4°
Node (Ω)52.9° Notes ReferenceTok2021c
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 133.3 0.133
2001 129.4 0.130
2002 125.3 0.127
2003 121.0 0.125
2004 116.6 0.123
2005 112.1 0.121
2006 107.4 0.119
2007 102.5 0.117
2008 97.6 0.116
2009 92.5 0.114
2010 87.2 0.113
2011 81.8 0.111
2012 76.2 0.109
2013 70.3 0.106
2014 64.1 0.103
2015 57.4 0.098
2016 50.0 0.093
2017 41.7 0.087
2018 32.0 0.080
2019 20.4 0.073
2020 6.2 0.066
2021 349.5 0.062
2022 331.4 0.061
2023 314.0 0.064
2024 299.1 0.071
2025 287.2 0.080
2026 277.8 0.090
2027 270.4 0.101
2028 264.4 0.112
2029 259.4 0.122
2030 255.3 0.132
2031 251.7 0.142
2032 248.5 0.151
2033 245.7 0.159
2034 243.2 0.167
2035 240.9 0.175
2036 238.7 0.182
2037 236.8 0.188
2038 234.9 0.194
2039 233.2 0.200
2040 231.5 0.205
2041 230.0 0.210
2042 228.5 0.214
2043 227.0 0.218
2044 225.6 0.222
2045 224.3 0.225
2046 223.0 0.228
2047 221.7 0.231
2048 220.4 0.233
2049 219.2 0.235
2050 218.0 0.237


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds00258%2B1025a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic