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Doubles in session


Current system
15282+0251
A 2175
HD 137844


Nearby doubles
5' : 15281+0255
TDS9524AB

21' : 15273+0306
HDS2172

31' : 15292+0317
LDS5838

37' : 15279+0215
SLW1096

38' : 15306+0303
CVR 788

41' : 15257+0307
J 442

44' : 15262+0221
SLW1091

46' : 15301+0216
SLW1100

59' : 15243+0248
HDS2165

60' : 15259+0340
UC 3002

74' : 15296+0141
KPP1203

77' : 15302+0140
BAL1904

86' : 15287+0416
UC 3009AB

87' : 15330+0308
GRV1114

96' : 15345+0307
HDS2187

97' : 15250+0128
UC 2999

105' : 15347+0212
RAO 337

106' : 15323+0417
UC 3025AB

110' : 15298+0439
HDS2180

119' : 15356+0209
BAL1905

130' : 15317+0053
TOK 48

144' : 15374+0214
SLW1116

145' : 15216+0437
CVR 785

145' : 15333+0454
SKF2213

149' : 15193+0146
STF1930AB

151' : 15276+0522
STF1943



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.

15282+0251 A 2175 (HD 137844)

 
 
15h 28m 12.94s +02° 51' 21.6" P.A. 223.00 sep 0.2 mag 8.78,9.09 Sp A5 dist. 250.63 pc (817.56 l.y.)
 
 
Coord 2000 15282+0251 Discov num A  2175 Comp Coord arcsec 2000 15 28 12.94 +02 51 21.6
Date first 1910 Date last 2021 Obs 51
Pa first 349 Pa last 222.8 P.A. Now (θ) 222.8°
Sep first 0.2 Sep last 0.198 Sep. Now (ρ) 0.198"
Mag pri 8.78 Mag sec 9.09 delta mag (ΔM) 0.31 Spectral class A5 (white)
Pri motion ra -016 Sec motion ra
Pri motion dec -016 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 137844 Constellation Serpens SAO 121015 HIP 75724
Tycho2 0341-00121-1 Gaia DR2 4421301323766535168 HD 137844 ADS 9654
BD BD+03 3034 Distance 250.63 Distance ly 817.56
 
 
ORBITAL ELEMENTS
 
 
Period (P)179.6y± 15.3 Periastron (T)1932.6y± 3.3 Semi-major axis (a)0.253a± 0.021
Eccentricity (e)0.377± 0.044 Inclination (i)65.2°± 2.2 Longitude of periastron (ω)246.4°± 11.5
Node (Ω)180.4°± 2.2 Notesn ReferenceTok2022g
Equinox2000 Last observation2021 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 202.3 0.259
2001 203.1 0.257
2002 203.8 0.254
2003 204.6 0.252
2004 205.4 0.249
2005 206.2 0.247
2006 207.0 0.244
2007 207.9 0.241
2008 208.7 0.239
2009 209.6 0.236
2010 210.5 0.233
2011 211.5 0.230
2012 212.4 0.227
2013 213.4 0.224
2014 214.4 0.220
2015 215.5 0.217
2016 216.5 0.214
2017 217.6 0.211
2018 218.8 0.208
2019 219.9 0.204
2020 221.2 0.201
2021 222.4 0.198
2022 223.7 0.195
2023 225.0 0.191
2024 226.4 0.188
2025 227.9 0.185
2026 229.3 0.182
2027 230.9 0.179
2028 232.5 0.176
2029 234.1 0.173
2030 235.8 0.170
2031 237.6 0.167
2032 239.4 0.164
2033 241.3 0.161
2034 243.2 0.159
2035 245.2 0.156
2036 247.3 0.154
2037 249.5 0.152
2038 251.7 0.149
2039 253.9 0.148
2040 256.2 0.146
2041 258.6 0.144
2042 261.0 0.143
2043 263.5 0.141
2044 266.0 0.140
2045 268.5 0.140
2046 271.1 0.139
2047 273.7 0.138
2048 276.3 0.138
2049 278.9 0.138
2050 281.5 0.138


 
 grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
wds15282%2B0251b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic